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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java')
| -rwxr-xr-x | bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java | 2543 |
1 files changed, 2543 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java new file mode 100755 index 0000000000..0f0befb5d1 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java @@ -0,0 +1,2543 @@ +/******************************************************************************* + * Copyright (c) 2000, 2009 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +package org.eclipse.swt.widgets; + + +import org.eclipse.swt.internal.win32.*; +import org.eclipse.swt.*; +import org.eclipse.swt.graphics.*; +import org.eclipse.swt.events.*; + +/** + * Instances of this class are selectable user interface + * objects that allow the user to enter and modify text. + * Text controls can be either single or multi-line. + * When a text control is created with a border, the + * operating system includes a platform specific inset + * around the contents of the control. When created + * without a border, an effort is made to remove the + * inset such that the preferred size of the control + * is the same size as the contents. + * <p> + * <dl> + * <dt><b>Styles:</b></dt> + * <dd>CENTER, ICON_CANCEL, ICON_SEARCH, LEFT, MULTI, PASSWORD, SEARCH, SINGLE, RIGHT, READ_ONLY, WRAP</dd> + * <dt><b>Events:</b></dt> + * <dd>DefaultSelection, Modify, Verify</dd> + * </dl> + * <p> + * Note: Only one of the styles MULTI and SINGLE may be specified, + * and only one of the styles LEFT, CENTER, and RIGHT may be specified. + * </p> + * <p> + * Note: The styles ICON_CANCEL and ICON_SEARCH are hints used in combination with SEARCH. + * When the platform supports the hint, the text control shows these icons. When an icon + * is selected, a default selection event is sent with the detail field set to one of + * ICON_CANCEL or ICON_SEARCH. Normally, application code does not need to check the + * detail. In the case of ICON_CANCEL, the text is cleared before the default selection + * event is sent causing the application to search for an empty string. + * </p> + * <p> + * IMPORTANT: This class is <em>not</em> intended to be subclassed. + * </p> + * + * @see <a href="http://www.eclipse.org/swt/snippets/#text">Text snippets</a> + * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> + * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> + * @noextend This class is not intended to be subclassed by clients. + */ +public class Text extends Scrollable { + int tabs, oldStart, oldEnd; + boolean doubleClick, ignoreModify, ignoreVerify, ignoreCharacter; + String message; + + /** + * The maximum number of characters that can be entered + * into a text widget. + * <p> + * Note that this value is platform dependent, based upon + * the native widget implementation. + * </p> + */ + public static final int LIMIT; + + /** + * The delimiter used by multi-line text widgets. When text + * is queried and from the widget, it will be delimited using + * this delimiter. + */ + public static final String DELIMITER; + + /* + * This code is intentionally commented. + */ +// static final char PASSWORD; + + /* + * These values can be different on different platforms. + * Therefore they are not initialized in the declaration + * to stop the compiler from inlining. + */ + static { + LIMIT = OS.IsWinNT ? 0x7FFFFFFF : 0x7FFF; + DELIMITER = "\r\n"; + } + + static final int /*long*/ EditProc; + static final TCHAR EditClass = new TCHAR (0, "EDIT", true); + static { + WNDCLASS lpWndClass = new WNDCLASS (); + OS.GetClassInfo (0, EditClass, lpWndClass); + EditProc = lpWndClass.lpfnWndProc; + /* + * This code is intentionally commented. + */ +// int /*long*/ hwndText = OS.CreateWindowEx (0, +// EditClass, +// null, +// OS.WS_OVERLAPPED | OS.ES_PASSWORD, +// 0, 0, 0, 0, +// 0, +// 0, +// OS.GetModuleHandle (null), +// null); +// char echo = (char) OS.SendMessage (hwndText, OS.EM_GETPASSWORDCHAR, 0, 0); +// OS.DestroyWindow (hwndText); +// PASSWORD = echo != 0 ? echo : '*'; + } + +/** + * Constructs a new instance of this class given its parent + * and a style value describing its behavior and appearance. + * <p> + * The style value is either one of the style constants defined in + * class <code>SWT</code> which is applicable to instances of this + * class, or must be built by <em>bitwise OR</em>'ing together + * (that is, using the <code>int</code> "|" operator) two or more + * of those <code>SWT</code> style constants. The class description + * lists the style constants that are applicable to the class. + * Style bits are also inherited from superclasses. + * </p> + * + * @param parent a composite control which will be the parent of the new instance (cannot be null) + * @param style the style of control to construct + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> + * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> + * </ul> + * + * @see SWT#SINGLE + * @see SWT#MULTI + * @see SWT#READ_ONLY + * @see SWT#WRAP + * @see SWT#LEFT + * @see SWT#RIGHT + * @see SWT#CENTER + * @see SWT#PASSWORD + * @see SWT#SEARCH + * @see SWT#ICON_SEARCH + * @see SWT#ICON_CANCEL + * @see Widget#checkSubclass + * @see Widget#getStyle + */ +public Text (Composite parent, int style) { + super (parent, checkStyle (style)); +} + +int /*long*/ callWindowProc (int /*long*/ hwnd, int msg, int /*long*/ wParam, int /*long*/ lParam) { + if (handle == 0) return 0; + boolean redraw = false; + switch (msg) { + case OS.WM_ERASEBKGND: { + if (findImageControl () != null) return 0; + break; + } + case OS.WM_HSCROLL: + case OS.WM_VSCROLL: { + redraw = findImageControl () != null && getDrawing () && OS.IsWindowVisible (handle); + if (redraw) OS.DefWindowProc (handle, OS.WM_SETREDRAW, 0, 0); + break; + } + case OS.WM_PAINT: { + boolean doubleBuffer = findImageControl () != null; + boolean drawMessage = false; + if ((style & SWT.SINGLE) != 0 && message.length () > 0) { + if (!OS.IsWinCE && OS.WIN32_VERSION < OS.VERSION (6, 0)) { + drawMessage = hwnd != OS.GetFocus () && OS.GetWindowTextLength (handle) == 0; + } + } + if (doubleBuffer || drawMessage) { + int /*long*/ paintDC = 0; + PAINTSTRUCT ps = new PAINTSTRUCT (); + paintDC = OS.BeginPaint (handle, ps); + int width = ps.right - ps.left; + int height = ps.bottom - ps.top; + if (width != 0 && height != 0) { + int /*long*/ hDC = paintDC, hBitmap = 0, hOldBitmap = 0; + POINT lpPoint1 = null, lpPoint2 = null; + if (doubleBuffer) { + hDC = OS.CreateCompatibleDC (paintDC); + lpPoint1 = new POINT (); + lpPoint2 = new POINT (); + OS.SetWindowOrgEx (hDC, ps.left, ps.top, lpPoint1); + OS.SetBrushOrgEx (hDC, ps.left, ps.top, lpPoint2); + hBitmap = OS.CreateCompatibleBitmap (paintDC, width, height); + hOldBitmap = OS.SelectObject (hDC, hBitmap); + RECT rect = new RECT (); + OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom); + drawBackground (hDC, rect); + } + + OS.CallWindowProc (EditProc, hwnd, OS.WM_PAINT, hDC, lParam); + /* + * Bug in XP. Windows does not draw the cue message on XP when + * East Asian language pack is installed. The fix is to draw + * the cue messages ourselves. + * Note: This bug is fixed on Vista. + */ + if (drawMessage) { + RECT rect = new RECT(); + OS.GetClientRect(handle, rect); + int /*long*/ margins = OS.SendMessage (handle, OS.EM_GETMARGINS, 0, 0); + rect.left += OS.LOWORD (margins); + rect.right -= OS.HIWORD (margins); + if ((style & SWT.BORDER) != 0) { + rect.left++; + rect.top++; + rect.right--; + rect.bottom--; + } + TCHAR buffer = new TCHAR (getCodePage (), message, false); + int uFormat = OS.DT_EDITCONTROL; + boolean rtl = (style & SWT.RIGHT_TO_LEFT) != 0; + if (rtl) uFormat |= OS.DT_RTLREADING; + int alignment = style & (SWT.LEFT | SWT.CENTER | SWT.RIGHT); + switch (alignment) { + case SWT.LEFT: uFormat |= (rtl ? OS.DT_RIGHT : OS.DT_LEFT); break; + case SWT.CENTER: uFormat |= OS.DT_CENTER; + case SWT.RIGHT: uFormat |= (rtl ? OS.DT_LEFT : OS.DT_RIGHT); break; + } + int /*long*/ hFont = OS.SendMessage (hwnd, OS.WM_GETFONT, 0, 0); + int /*long*/ hOldFont = OS.SelectObject (hDC, hFont); + OS.SetTextColor (hDC, OS.GetSysColor (OS.COLOR_GRAYTEXT)); + OS.SetBkMode (hDC, OS.TRANSPARENT); + OS.DrawText (hDC, buffer, buffer.length (), rect, uFormat); + OS.SelectObject (hDC, hOldFont); + } + + if (doubleBuffer) { + OS.SetWindowOrgEx (hDC, lpPoint1.x, lpPoint1.y, null); + OS.SetBrushOrgEx (hDC, lpPoint2.x, lpPoint2.y, null); + OS.BitBlt (paintDC, ps.left, ps.top, width, height, hDC, 0, 0, OS.SRCCOPY); + OS.SelectObject (hDC, hOldBitmap); + OS.DeleteObject (hBitmap); + OS.DeleteObject (hDC); + } + } + OS.EndPaint (handle, ps); + return 0; + } + break; + } + } + int /*long*/ code = OS.CallWindowProc (EditProc, hwnd, msg, wParam, lParam); + switch (msg) { + case OS.WM_HSCROLL: + case OS.WM_VSCROLL: { + if (redraw) { + OS.DefWindowProc (handle, OS.WM_SETREDRAW, 1, 0); + OS.InvalidateRect (handle, null, true); + } + break; + } + } + return code; +} + +void createHandle () { + super.createHandle (); + OS.SendMessage (handle, OS.EM_LIMITTEXT, 0, 0); + if ((style & SWT.READ_ONLY) != 0) { + if ((style & (SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { + state |= THEME_BACKGROUND; + } + } +} + +/** + * Adds the listener to the collection of listeners who will + * be notified when the receiver's text is modified, by sending + * it one of the messages defined in the <code>ModifyListener</code> + * interface. + * + * @param listener the listener which should be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see ModifyListener + * @see #removeModifyListener + */ +public void addModifyListener (ModifyListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (SWT.Modify, typedListener); +} + +/** + * Adds the listener to the collection of listeners who will + * be notified when the control is selected by the user, by sending + * it one of the messages defined in the <code>SelectionListener</code> + * interface. + * <p> + * <code>widgetSelected</code> is not called for texts. + * <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text, + * or when ENTER is pressed in a search text. If the receiver has the <code>SWT.SEARCH | SWT.CANCEL</code> style + * and the user cancels the search, the event object detail field contains the value <code>SWT.CANCEL</code>. + * </p> + * + * @param listener the listener which should be notified when the control is selected by the user + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SelectionListener + * @see #removeSelectionListener + * @see SelectionEvent + */ +public void addSelectionListener (SelectionListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (SWT.Selection,typedListener); + addListener (SWT.DefaultSelection,typedListener); +} + +/** + * Adds the listener to the collection of listeners who will + * be notified when the receiver's text is verified, by sending + * it one of the messages defined in the <code>VerifyListener</code> + * interface. + * + * @param listener the listener which should be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see VerifyListener + * @see #removeVerifyListener + */ +public void addVerifyListener (VerifyListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (SWT.Verify, typedListener); +} + +/** + * Appends a string. + * <p> + * The new text is appended to the text at + * the end of the widget. + * </p> + * + * @param string the string to be appended + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the string is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void append (String string) { + checkWidget (); + if (string == null) error (SWT.ERROR_NULL_ARGUMENT); + string = Display.withCrLf (string); + int length = OS.GetWindowTextLength (handle); + if (hooks (SWT.Verify) || filters (SWT.Verify)) { + string = verifyText (string, length, length, null); + if (string == null) return; + } + OS.SendMessage (handle, OS.EM_SETSEL, length, length); + TCHAR buffer = new TCHAR (getCodePage (), string, true); + /* + * Feature in Windows. When an edit control with ES_MULTILINE + * style that does not have the WS_VSCROLL style is full (i.e. + * there is no space at the end to draw any more characters), + * EM_REPLACESEL sends a WM_CHAR with a backspace character + * to remove any further text that is added. This is an + * implementation detail of the edit control that is unexpected + * and can cause endless recursion when EM_REPLACESEL is sent + * from a WM_CHAR handler. The fix is to ignore calling the + * handler from WM_CHAR. + */ + ignoreCharacter = true; + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); + ignoreCharacter = false; + OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); +} + +static int checkStyle (int style) { + if ((style & SWT.SEARCH) != 0) { + style |= SWT.SINGLE | SWT.BORDER; + style &= ~SWT.PASSWORD; + /* + * NOTE: ICON_CANCEL has the same value as H_SCROLL and + * ICON_SEARCH has the same value as V_SCROLL so they are + * cleared because SWT.SINGLE is set. + */ + } + if ((style & SWT.SINGLE) != 0 && (style & SWT.MULTI) != 0) { + style &= ~SWT.MULTI; + } + style = checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0); + if ((style & SWT.SINGLE) != 0) style &= ~(SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP); + if ((style & SWT.WRAP) != 0) { + style |= SWT.MULTI; + style &= ~SWT.H_SCROLL; + } + if ((style & SWT.MULTI) != 0) style &= ~SWT.PASSWORD; + if ((style & (SWT.SINGLE | SWT.MULTI)) != 0) return style; + if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0) return style | SWT.MULTI; + return style | SWT.SINGLE; +} + +/** + * Clears the selection. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void clearSelection () { + checkWidget (); + if (OS.IsWinCE) { + /* + * Bug in WinCE. Calling EM_SETSEL with -1 and 0 is equivalent + * to calling EM_SETSEL with 0 and -1. It causes the entire + * text to be selected instead of clearing the selection. The + * fix is to set the start of the selection to the end of the + * current selection. + */ + int [] end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, (int []) null, end); + OS.SendMessage (handle, OS.EM_SETSEL, end [0], end [0]); + } else { + OS.SendMessage (handle, OS.EM_SETSEL, -1, 0); + } +} + +public Point computeSize (int wHint, int hHint, boolean changed) { + checkWidget (); + int height = 0, width = 0; + if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { + int /*long*/ newFont, oldFont = 0; + int /*long*/ hDC = OS.GetDC (handle); + newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); + if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); + TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA (); + OS.GetTextMetrics (hDC, tm); + int count = (style & SWT.SINGLE) != 0 ? 1 : (int)/*64*/OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); + height = count * tm.tmHeight; + RECT rect = new RECT (); + int flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_NOPREFIX; + boolean wrap = (style & SWT.MULTI) != 0 && (style & SWT.WRAP) != 0; + if (wrap && wHint != SWT.DEFAULT) { + flags |= OS.DT_WORDBREAK; + rect.right = wHint; + } + int length = OS.GetWindowTextLength (handle); + if (length != 0) { + TCHAR buffer = new TCHAR (getCodePage (), length + 1); + OS.GetWindowText (handle, buffer, length + 1); + OS.DrawText (hDC, buffer, length, rect, flags); + width = rect.right - rect.left; + } + if (wrap && hHint == SWT.DEFAULT) { + int newHeight = rect.bottom - rect.top; + if (newHeight != 0) height = newHeight; + } + if ((style & SWT.SINGLE) != 0 && message.length () > 0) { + OS.SetRect (rect, 0, 0, 0, 0); + TCHAR buffer = new TCHAR (getCodePage (), message, false); + OS.DrawText (hDC, buffer, buffer.length (), rect, flags); + width = Math.max (width, rect.right - rect.left); + } + if (newFont != 0) OS.SelectObject (hDC, oldFont); + OS.ReleaseDC (handle, hDC); + } + if (width == 0) width = DEFAULT_WIDTH; + if (height == 0) height = DEFAULT_HEIGHT; + if (wHint != SWT.DEFAULT) width = wHint; + if (hHint != SWT.DEFAULT) height = hHint; + Rectangle trim = computeTrim (0, 0, width, height); + return new Point (trim.width, trim.height); +} + +public Rectangle computeTrim (int x, int y, int width, int height) { + checkWidget (); + Rectangle rect = super.computeTrim (x, y, width, height); + /* + * The preferred height of a single-line text widget + * has been hand-crafted to be the same height as + * the single-line text widget in an editable combo + * box. + */ + int /*long*/ margins = OS.SendMessage(handle, OS.EM_GETMARGINS, 0, 0); + rect.x -= OS.LOWORD (margins); + rect.width += OS.LOWORD (margins) + OS.HIWORD (margins); + if ((style & SWT.H_SCROLL) != 0) rect.width++; + if ((style & SWT.BORDER) != 0) { + rect.x -= 1; + rect.y -= 1; + rect.width += 2; + rect.height += 2; + } + return rect; +} + +/** + * Copies the selected text. + * <p> + * The current selection is copied to the clipboard. + * </p> + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void copy () { + checkWidget (); + OS.SendMessage (handle, OS.WM_COPY, 0, 0); +} + +void createWidget () { + super.createWidget (); + message = ""; + doubleClick = true; + setTabStops (tabs = 8); + fixAlignment (); +} + +/** + * Cuts the selected text. + * <p> + * The current selection is first copied to the + * clipboard and then deleted from the widget. + * </p> + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void cut () { + checkWidget (); + if ((style & SWT.READ_ONLY) != 0) return; + OS.SendMessage (handle, OS.WM_CUT, 0, 0); +} + +int defaultBackground () { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + return OS.GetSysColor ((bits & OS.ES_READONLY) != 0 ? OS.COLOR_3DFACE : OS.COLOR_WINDOW); +} + +boolean dragDetect (int /*long*/ hwnd, int x, int y, boolean filter, boolean [] detect, boolean [] consume) { + if (filter) { + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (start [0] != end [0]) { + int /*long*/ lParam = OS.MAKELPARAM (x, y); + int position = OS.LOWORD (OS.SendMessage (handle, OS.EM_CHARFROMPOS, 0, lParam)); + if (start [0] <= position && position < end [0]) { + if (super.dragDetect (hwnd, x, y, filter, detect, consume)) { + if (consume != null) consume [0] = true; + return true; + } + } + } + return false; + } + return super.dragDetect (hwnd, x, y, filter, detect, consume); +} + +void fixAlignment () { + /* + * Feature in Windows. When the edit control is not + * mirrored, it uses WS_EX_RIGHT, WS_EX_RTLREADING and + * WS_EX_LEFTSCROLLBAR to give the control a right to + * left appearance. This causes the control to be lead + * aligned no matter what alignment was specified by + * the programmer. For example, setting ES_RIGHT and + * WS_EX_LAYOUTRTL should cause the contents of the + * control to be left (trail) aligned in a mirrored world. + * When the orientation is changed by the user or + * specified by the programmer, WS_EX_RIGHT conflicts + * with the mirrored alignment. The fix is to clear + * or set WS_EX_RIGHT to achieve the correct alignment + * according to the orientation and mirroring. + */ + if ((style & SWT.MIRRORED) != 0) return; + int bits1 = OS.GetWindowLong (handle, OS.GWL_EXSTYLE); + int bits2 = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((style & SWT.LEFT_TO_RIGHT) != 0) { + /* + * Bug in Windows 98. When the edit control is created + * with the style ES_RIGHT it automatically sets the + * WS_EX_LEFTSCROLLBAR bit. The fix is to clear the + * bit when the orientation of the control is left + * to right. + */ + bits1 &= ~OS.WS_EX_LEFTSCROLLBAR; + if ((style & SWT.RIGHT) != 0) { + bits1 |= OS.WS_EX_RIGHT; + bits2 |= OS.ES_RIGHT; + } + if ((style & SWT.LEFT) != 0) { + bits1 &= ~OS.WS_EX_RIGHT; + bits2 &= ~OS.ES_RIGHT; + } + } else { + if ((style & SWT.RIGHT) != 0) { + bits1 &= ~OS.WS_EX_RIGHT; + bits2 &= ~OS.ES_RIGHT; + } + if ((style & SWT.LEFT) != 0) { + bits1 |= OS.WS_EX_RIGHT; + bits2 |= OS.ES_RIGHT; + } + } + if ((style & SWT.CENTER) != 0) { + bits2 |= OS.ES_CENTER; + } + OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits1); + OS.SetWindowLong (handle, OS.GWL_STYLE, bits2); +} + +public int getBorderWidth () { + checkWidget (); + /* + * Feature in Windows 2000 and XP. Despite the fact that WS_BORDER + * is set when the edit control is created, the style bit is cleared. + * The fix is to avoid the check for WS_BORDER and use the SWT widget + * style bits instead. + */ +// if ((style & SWT.BORDER) != 0 && (style & SWT.FLAT) != 0) { +// return OS.GetSystemMetrics (OS.SM_CXBORDER); +// } + return super.getBorderWidth (); +} + +/** + * Returns the line number of the caret. + * <p> + * The line number of the caret is returned. + * </p> + * + * @return the line number + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getCaretLineNumber () { + checkWidget (); + return (int)/*64*/OS.SendMessage (handle, OS.EM_LINEFROMCHAR, -1, 0); +} + +/** + * Returns a point describing the receiver's location relative + * to its parent (or its display if its parent is null). + * <p> + * The location of the caret is returned. + * </p> + * + * @return a point, the location of the caret + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public Point getCaretLocation () { + checkWidget (); + /* + * Bug in Windows. For some reason, Windows is unable + * to return the pixel coordinates of the last character + * in the widget. The fix is to temporarily insert a + * space, query the coordinates and delete the space. + * The selection is always an i-beam in this case because + * this is the only time the start of the selection can + * be equal to the last character position in the widget. + * If EM_POSFROMCHAR fails for any other reason, return + * pixel coordinates (0,0). + */ + int position = getCaretPosition (); + int /*long*/ caretPos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, position, 0); + if (caretPos == -1) { + caretPos = 0; + if (position >= OS.GetWindowTextLength (handle)) { + int cp = getCodePage (); + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + OS.SendMessage (handle, OS.EM_SETSEL, position, position); + /* + * Feature in Windows. When an edit control with ES_MULTILINE + * style that does not have the WS_VSCROLL style is full (i.e. + * there is no space at the end to draw any more characters), + * EM_REPLACESEL sends a WM_CHAR with a backspace character + * to remove any further text that is added. This is an + * implementation detail of the edit control that is unexpected + * and can cause endless recursion when EM_REPLACESEL is sent + * from a WM_CHAR handler. The fix is to ignore calling the + * handler from WM_CHAR. + */ + ignoreCharacter = ignoreModify = true; + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, new TCHAR (cp, " ", true)); + caretPos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, position, 0); + OS.SendMessage (handle, OS.EM_SETSEL, position, position + 1); + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, new TCHAR (cp, "", true)); + ignoreCharacter = ignoreModify = false; + OS.SendMessage (handle, OS.EM_SETSEL, start [0], start [0]); + OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); + } + } + return new Point (OS.GET_X_LPARAM (caretPos), OS.GET_Y_LPARAM (caretPos)); +} + +/** + * Returns the character position of the caret. + * <p> + * Indexing is zero based. + * </p> + * + * @return the position of the caret + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getCaretPosition () { + checkWidget (); + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + /* + * In Windows, there is no API to get the position of the caret + * when the selection is not an i-beam. The best that can be done + * is to query the pixel position of the current caret and compare + * it to the pixel position of the start and end of the selection. + * + * NOTE: This does not work when the i-beam belongs to another + * control. In this case, guess that the i-beam is at the start + * of the selection. + */ + int caret = start [0]; + if (start [0] != end [0]) { + int startLine = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEFROMCHAR, start [0], 0); + int endLine = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEFROMCHAR, end [0], 0); + if (startLine == endLine) { + if (!OS.IsWinCE) { + int idThread = OS.GetWindowThreadProcessId (handle, null); + GUITHREADINFO lpgui = new GUITHREADINFO (); + lpgui.cbSize = GUITHREADINFO.sizeof; + if (OS.GetGUIThreadInfo (idThread, lpgui)) { + if (lpgui.hwndCaret == handle || lpgui.hwndCaret == 0) { + POINT ptCurrentPos = new POINT (); + if (OS.GetCaretPos (ptCurrentPos)) { + int /*long*/ endPos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, end [0], 0); + if (endPos == -1) { + int /*long*/ startPos = OS.SendMessage (handle, OS.EM_POSFROMCHAR, start [0], 0); + int startX = OS.GET_X_LPARAM (startPos); + if (ptCurrentPos.x > startX) caret = end [0]; + } else { + int endX = OS.GET_X_LPARAM (endPos); + if (ptCurrentPos.x >= endX) caret = end [0]; + } + } + } + } + } + } else { + int caretPos = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEINDEX, -1, 0); + int caretLine = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEFROMCHAR, caretPos, 0); + if (caretLine == endLine) caret = end [0]; + } + } + if (!OS.IsUnicode && OS.IsDBLocale) caret = mbcsToWcsPos (caret); + return caret; +} + +/** + * Returns the number of characters. + * + * @return number of characters in the widget + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getCharCount () { + checkWidget (); + int length = OS.GetWindowTextLength (handle); + if (!OS.IsUnicode && OS.IsDBLocale) length = mbcsToWcsPos (length); + return length; +} + +/** + * Returns the double click enabled flag. + * <p> + * The double click flag enables or disables the + * default action of the text widget when the user + * double clicks. + * </p> + * + * @return whether or not double click is enabled + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public boolean getDoubleClickEnabled () { + checkWidget (); + return doubleClick; +} + +/** + * Returns the echo character. + * <p> + * The echo character is the character that is + * displayed when the user enters text or the + * text is changed by the programmer. + * </p> + * + * @return the echo character + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #setEchoChar + */ +public char getEchoChar () { + checkWidget (); + char echo = (char) OS.SendMessage (handle, OS.EM_GETPASSWORDCHAR, 0, 0); + if (echo != 0 && (echo = Display.mbcsToWcs (echo, getCodePage ())) == 0) echo = '*'; + return echo; +} + +/** + * Returns the editable state. + * + * @return whether or not the receiver is editable + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public boolean getEditable () { + checkWidget (); + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + return (bits & OS.ES_READONLY) == 0; +} + +/** + * Returns the number of lines. + * + * @return the number of lines in the widget + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getLineCount () { + checkWidget (); + return (int)/*64*/OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); +} + +/** + * Returns the line delimiter. + * + * @return a string that is the line delimiter + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #DELIMITER + */ +public String getLineDelimiter () { + checkWidget (); + return DELIMITER; +} + +/** + * Returns the height of a line. + * + * @return the height of a row of text + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getLineHeight () { + checkWidget (); + int /*long*/ newFont, oldFont = 0; + int /*long*/ hDC = OS.GetDC (handle); + newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); + if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); + TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA (); + OS.GetTextMetrics (hDC, tm); + if (newFont != 0) OS.SelectObject (hDC, oldFont); + OS.ReleaseDC (handle, hDC); + return tm.tmHeight; +} + +/** + * Returns the orientation of the receiver, which will be one of the + * constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>. + * + * @return the orientation style + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 2.1.2 + */ +public int getOrientation () { + checkWidget(); + return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT); +} + +/** + * Returns the widget message. The message text is displayed + * as a hint for the user, indicating the purpose of the field. + * <p> + * Typically this is used in conjunction with <code>SWT.SEARCH</code>. + * </p> + * + * @return the widget message + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.3 + */ +public String getMessage () { + checkWidget (); + return message; +} + +/** + * Returns the character position at the given point in the receiver + * or -1 if no such position exists. The point is in the coordinate + * system of the receiver. + * <p> + * Indexing is zero based. + * </p> + * + * @return the position of the caret + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.3 + */ +//TODO - Javadoc +/*public*/ int getPosition (Point point) { + checkWidget(); + if (point == null) error (SWT.ERROR_NULL_ARGUMENT); + int /*long*/ lParam = OS.MAKELPARAM (point.x, point.y); + int position = OS.LOWORD (OS.SendMessage (handle, OS.EM_CHARFROMPOS, 0, lParam)); + if (!OS.IsUnicode && OS.IsDBLocale) position = mbcsToWcsPos (position); + return position; +} + +/** + * Returns a <code>Point</code> whose x coordinate is the + * character position representing the start of the selected + * text, and whose y coordinate is the character position + * representing the end of the selection. An "empty" selection + * is indicated by the x and y coordinates having the same value. + * <p> + * Indexing is zero based. The range of a selection is from + * 0..N where N is the number of characters in the widget. + * </p> + * + * @return a point representing the selection start and end + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public Point getSelection () { + checkWidget (); + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (!OS.IsUnicode && OS.IsDBLocale) { + start [0] = mbcsToWcsPos (start [0]); + end [0] = mbcsToWcsPos (end [0]); + } + return new Point (start [0], end [0]); +} + +/** + * Returns the number of selected characters. + * + * @return the number of selected characters. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getSelectionCount () { + checkWidget (); + Point selection = getSelection (); + return selection.y - selection.x; +} + +/** + * Gets the selected text, or an empty string if there is no current selection. + * + * @return the selected text + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public String getSelectionText () { + checkWidget (); + int length = OS.GetWindowTextLength (handle); + if (length == 0) return ""; + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (start [0] == end [0]) return ""; + TCHAR buffer = new TCHAR (getCodePage (), length + 1); + OS.GetWindowText (handle, buffer, length + 1); + return buffer.toString (start [0], end [0] - start [0]); +} + +/** + * Returns the number of tabs. + * <p> + * Tab stop spacing is specified in terms of the + * space (' ') character. The width of a single + * tab stop is the pixel width of the spaces. + * </p> + * + * @return the number of tab characters + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getTabs () { + checkWidget (); + return tabs; +} + +int getTabWidth (int tabs) { + int /*long*/ oldFont = 0; + RECT rect = new RECT (); + int /*long*/ hDC = OS.GetDC (handle); + int /*long*/ newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); + if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); + int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE | OS.DT_NOPREFIX; + TCHAR SPACE = new TCHAR (getCodePage (), " ", false); + OS.DrawText (hDC, SPACE, SPACE.length (), rect, flags); + if (newFont != 0) OS.SelectObject (hDC, oldFont); + OS.ReleaseDC (handle, hDC); + return (rect.right - rect.left) * tabs; +} + +/** + * Returns the widget text. + * <p> + * The text for a text widget is the characters in the widget, or + * an empty string if this has never been set. + * </p> + * + * @return the widget text + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public String getText () { + checkWidget (); + int length = OS.GetWindowTextLength (handle); + if (length == 0) return ""; + TCHAR buffer = new TCHAR (getCodePage (), length + 1); + OS.GetWindowText (handle, buffer, length + 1); + return buffer.toString (0, length); +} + +/** + * Returns a range of text. Returns an empty string if the + * start of the range is greater than the end. + * <p> + * Indexing is zero based. The range of + * a selection is from 0..N-1 where N is + * the number of characters in the widget. + * </p> + * + * @param start the start of the range + * @param end the end of the range + * @return the range of text + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public String getText (int start, int end) { + checkWidget (); + if (!(start <= end && 0 <= end)) return ""; + int length = OS.GetWindowTextLength (handle); + if (!OS.IsUnicode && OS.IsDBLocale) length = mbcsToWcsPos (length); + end = Math.min (end, length - 1); + if (start > end) return ""; + start = Math.max (0, start); + /* + * NOTE: The current implementation uses substring () + * which can reference a potentially large character + * array. + */ + return getText ().substring (start, end + 1); +} + +/** + * Returns the maximum number of characters that the receiver is capable of holding. + * <p> + * If this has not been changed by <code>setTextLimit()</code>, + * it will be the constant <code>Text.LIMIT</code>. + * </p> + * + * @return the text limit + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #LIMIT + */ +public int getTextLimit () { + checkWidget (); + return (int)/*64*/OS.SendMessage (handle, OS.EM_GETLIMITTEXT, 0, 0) & 0x7FFFFFFF; +} + +/** + * Returns the zero-relative index of the line which is currently + * at the top of the receiver. + * <p> + * This index can change when lines are scrolled or new lines are added or removed. + * </p> + * + * @return the index of the top line + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getTopIndex () { + checkWidget (); + if ((style & SWT.SINGLE) != 0) return 0; + return (int)/*64*/OS.SendMessage (handle, OS.EM_GETFIRSTVISIBLELINE, 0, 0); +} + +/** + * Returns the top pixel. + * <p> + * The top pixel is the pixel position of the line + * that is currently at the top of the widget. On + * some platforms, a text widget can be scrolled by + * pixels instead of lines so that a partial line + * is displayed at the top of the widget. + * </p><p> + * The top pixel changes when the widget is scrolled. + * The top pixel does not include the widget trimming. + * </p> + * + * @return the pixel position of the top line + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getTopPixel () { + checkWidget (); + /* + * Note, EM_GETSCROLLPOS is implemented in Rich Edit 3.0 + * and greater. The plain text widget and previous versions + * of Rich Edit return zero. + */ + int [] buffer = new int [2]; + int /*long*/ code = OS.SendMessage (handle, OS.EM_GETSCROLLPOS, 0, buffer); + if (code == 1) return buffer [1]; + return getTopIndex () * getLineHeight (); +} + +/** + * Inserts a string. + * <p> + * The old selection is replaced with the new text. + * </p> + * + * @param string the string + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the string is <code>null</code></li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void insert (String string) { + checkWidget (); + if (string == null) error (SWT.ERROR_NULL_ARGUMENT); + string = Display.withCrLf (string); + if (hooks (SWT.Verify) || filters (SWT.Verify)) { + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + string = verifyText (string, start [0], end [0], null); + if (string == null) return; + } + TCHAR buffer = new TCHAR (getCodePage (), string, true); + /* + * Feature in Windows. When an edit control with ES_MULTILINE + * style that does not have the WS_VSCROLL style is full (i.e. + * there is no space at the end to draw any more characters), + * EM_REPLACESEL sends a WM_CHAR with a backspace character + * to remove any further text that is added. This is an + * implementation detail of the edit control that is unexpected + * and can cause endless recursion when EM_REPLACESEL is sent + * from a WM_CHAR handler. The fix is to ignore calling the + * handler from WM_CHAR. + */ + ignoreCharacter = true; + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); + ignoreCharacter = false; +} + +int mbcsToWcsPos (int mbcsPos) { + if (mbcsPos <= 0) return 0; + if (OS.IsUnicode) return mbcsPos; + int cp = getCodePage (); + int wcsTotal = 0, mbcsTotal = 0; + byte [] buffer = new byte [128]; + String delimiter = getLineDelimiter(); + int delimiterSize = delimiter.length (); + int count = (int)/*64*/OS.SendMessageA (handle, OS.EM_GETLINECOUNT, 0, 0); + for (int line=0; line<count; line++) { + int wcsSize = 0; + int linePos = (int)/*64*/OS.SendMessageA (handle, OS.EM_LINEINDEX, line, 0); + int mbcsSize = (int)/*64*/OS.SendMessageA (handle, OS.EM_LINELENGTH, linePos, 0); + if (mbcsSize != 0) { + if (mbcsSize + delimiterSize > buffer.length) { + buffer = new byte [mbcsSize + delimiterSize]; + } + //ENDIAN + buffer [0] = (byte) (mbcsSize & 0xFF); + buffer [1] = (byte) (mbcsSize >> 8); + mbcsSize = (int)/*64*/OS.SendMessageA (handle, OS.EM_GETLINE, line, buffer); + wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, mbcsSize, null, 0); + } + if (line - 1 != count) { + for (int i=0; i<delimiterSize; i++) { + buffer [mbcsSize++] = (byte) delimiter.charAt (i); + } + wcsSize += delimiterSize; + } + if ((mbcsTotal + mbcsSize) >= mbcsPos) { + int bufferSize = mbcsPos - mbcsTotal; + wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, bufferSize, null, 0); + return wcsTotal + wcsSize; + } + wcsTotal += wcsSize; + mbcsTotal += mbcsSize; + } + return wcsTotal; +} + +/** + * Pastes text from clipboard. + * <p> + * The selected text is deleted from the widget + * and new text inserted from the clipboard. + * </p> + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void paste () { + checkWidget (); + if ((style & SWT.READ_ONLY) != 0) return; + OS.SendMessage (handle, OS.WM_PASTE, 0, 0); +} + +void releaseWidget () { + super.releaseWidget (); + message = null; +} + +/** + * Removes the listener from the collection of listeners who will + * be notified when the receiver's text is modified. + * + * @param listener the listener which should no longer be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see ModifyListener + * @see #addModifyListener + */ +public void removeModifyListener (ModifyListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + if (eventTable == null) return; + eventTable.unhook (SWT.Modify, listener); +} + +/** + * Removes the listener from the collection of listeners who will + * be notified when the control is selected by the user. + * + * @param listener the listener which should no longer be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SelectionListener + * @see #addSelectionListener + */ +public void removeSelectionListener (SelectionListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + if (eventTable == null) return; + eventTable.unhook (SWT.Selection, listener); + eventTable.unhook (SWT.DefaultSelection,listener); +} + +/** + * Removes the listener from the collection of listeners who will + * be notified when the control is verified. + * + * @param listener the listener which should no longer be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see VerifyListener + * @see #addVerifyListener + */ +public void removeVerifyListener (VerifyListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + if (eventTable == null) return; + eventTable.unhook (SWT.Verify, listener); +} + +/** + * Selects all the text in the receiver. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void selectAll () { + checkWidget (); + OS.SendMessage (handle, OS.EM_SETSEL, 0, -1); +} + +boolean sendKeyEvent (int type, int msg, int /*long*/ wParam, int /*long*/ lParam, Event event) { + if (!super.sendKeyEvent (type, msg, wParam, lParam, event)) { + return false; + } + if ((style & SWT.READ_ONLY) != 0) return true; + if (ignoreVerify) return true; + if (type != SWT.KeyDown) return true; + if (msg != OS.WM_CHAR && msg != OS.WM_KEYDOWN && msg != OS.WM_IME_CHAR) { + return true; + } + if (event.character == 0) return true; + if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return true; + char key = event.character; + int stateMask = event.stateMask; + + /* + * Disable all magic keys that could modify the text + * and don't send events when Alt, Shift or Ctrl is + * pressed. + */ + switch (msg) { + case OS.WM_CHAR: + if (key != 0x08 && key != 0x7F && key != '\r' && key != '\t' && key != '\n') break; + // FALL THROUGH + case OS.WM_KEYDOWN: + if ((stateMask & (SWT.ALT | SWT.SHIFT | SWT.CONTROL)) != 0) return false; + break; + } + + /* + * Feature in Windows. If the left button is down in + * the text widget, it refuses the character. The fix + * is to detect this case and avoid sending a verify + * event. + */ + if (OS.GetKeyState (OS.VK_LBUTTON) < 0) { + if (handle == OS.GetCapture()) return true; + } + + /* Verify the character */ + String oldText = ""; + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + switch (key) { + case 0x08: /* Bs */ + if (start [0] == end [0]) { + if (start [0] == 0) return true; + int lineStart = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEINDEX, -1, 0); + if (start [0] == lineStart) { + start [0] = start [0] - DELIMITER.length (); + } else { + start [0] = start [0] - 1; + if (!OS.IsUnicode && OS.IsDBLocale) { + int [] newStart = new int [1], newEnd = new int [1]; + OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); + OS.SendMessage (handle, OS.EM_GETSEL, newStart, newEnd); + if (start [0] != newStart [0]) start [0] = start [0] - 1; + } + } + start [0] = Math.max (start [0], 0); + } + break; + case 0x7F: /* Del */ + if (start [0] == end [0]) { + int length = OS.GetWindowTextLength (handle); + if (start [0] == length) return true; + int line = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEFROMCHAR, end [0], 0); + int lineStart = (int)/*64*/OS.SendMessage (handle, OS.EM_LINEINDEX, line + 1, 0); + if (end [0] == lineStart - DELIMITER.length ()) { + end [0] = end [0] + DELIMITER.length (); + } else { + end [0] = end [0] + 1; + if (!OS.IsUnicode && OS.IsDBLocale) { + int [] newStart = new int [1], newEnd = new int [1]; + OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); + OS.SendMessage (handle, OS.EM_GETSEL, newStart, newEnd); + if (end [0] != newEnd [0]) end [0] = end [0] + 1; + } + } + end [0] = Math.min (end [0], length); + } + break; + case '\r': /* Return */ + if ((style & SWT.SINGLE) != 0) return true; + oldText = DELIMITER; + break; + default: /* Tab and other characters */ + if (key != '\t' && key < 0x20) return true; + oldText = new String (new char [] {key}); + break; + } + String newText = verifyText (oldText, start [0], end [0], event); + if (newText == null) return false; + if (newText == oldText) return true; + newText = Display.withCrLf (newText); + TCHAR buffer = new TCHAR (getCodePage (), newText, true); + OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); + /* + * Feature in Windows. When an edit control with ES_MULTILINE + * style that does not have the WS_VSCROLL style is full (i.e. + * there is no space at the end to draw any more characters), + * EM_REPLACESEL sends a WM_CHAR with a backspace character + * to remove any further text that is added. This is an + * implementation detail of the edit control that is unexpected + * and can cause endless recursion when EM_REPLACESEL is sent + * from a WM_CHAR handler. The fix is to ignore calling the + * handler from WM_CHAR. + */ + ignoreCharacter = true; + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); + ignoreCharacter = false; + return false; +} + +void setBounds (int x, int y, int width, int height, int flags) { + /* + * Feature in Windows. When the caret is moved, + * the text widget scrolls to show the new location. + * This means that the text widget may be scrolled + * to the right in order to show the caret when the + * widget is not large enough to show both the caret + * location and all the text. Unfortunately, when + * the text widget is resized such that all the text + * and the caret could be visible, Windows does not + * scroll the widget back. The fix is to resize the + * text widget, set the selection to the start of the + * text and then restore the selection. This will + * cause the text widget compute the correct scroll + * position. + */ + if ((flags & OS.SWP_NOSIZE) == 0 && width != 0) { + RECT rect = new RECT (); + OS.GetWindowRect (handle, rect); + int /*long*/ margins = OS.SendMessage (handle, OS.EM_GETMARGINS, 0, 0); + int marginWidth = OS.LOWORD (margins) + OS.HIWORD (margins); + if (rect.right - rect.left <= marginWidth) { + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (start [0] != 0 || end [0] != 0) { + SetWindowPos (handle, 0, x, y, width, height, flags); + OS.SendMessage (handle, OS.EM_SETSEL, 0, 0); + OS.SendMessage (handle, OS.EM_SETSEL, start [0], end [0]); + return; + } + } + } + super.setBounds (x, y, width, height, flags); + + /* + * Bug in Windows. If the client area height is smaller than + * the font height, then the multi-line text widget does not + * update the formatting rectangle when resized. The fix is to + * detect this case and explicitly set the formatting rectangle. + */ + if ((flags & OS.SWP_NOSIZE) == 0) { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) != 0) { + int /*long*/ newFont, oldFont = 0; + int /*long*/ hDC = OS.GetDC (handle); + newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); + if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); + TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA (); + OS.GetTextMetrics (hDC, tm); + if (newFont != 0) OS.SelectObject (hDC, oldFont); + OS.ReleaseDC (handle, hDC); + RECT rect = new RECT(); + OS.GetClientRect (handle, rect); + if ((rect.bottom - rect.top) < tm.tmHeight) { + int /*long*/ margins = OS.SendMessage (handle, OS.EM_GETMARGINS, 0, 0); + rect.left += OS.LOWORD (margins); + rect.right -= OS.HIWORD (margins); + rect.top = 0; + rect.bottom = tm.tmHeight; + OS.SendMessage (handle, OS.EM_SETRECT, 0, rect); + } + } + } +} + +void setDefaultFont () { + super.setDefaultFont (); + setMargins (); +} + +/** + * Sets the double click enabled flag. + * <p> + * The double click flag enables or disables the + * default action of the text widget when the user + * double clicks. + * </p><p> + * Note: This operation is a hint and is not supported on + * platforms that do not have this concept. + * </p> + * + * @param doubleClick the new double click flag + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setDoubleClickEnabled (boolean doubleClick) { + checkWidget (); + this.doubleClick = doubleClick; +} + +/** + * Sets the echo character. + * <p> + * The echo character is the character that is + * displayed when the user enters text or the + * text is changed by the programmer. Setting + * the echo character to '\0' clears the echo + * character and redraws the original text. + * If for any reason the echo character is invalid, + * or if the platform does not allow modification + * of the echo character, the default echo character + * for the platform is used. + * </p> + * + * @param echo the new echo character + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setEchoChar (char echo) { + checkWidget (); + if ((style & SWT.MULTI) != 0) return; + if (echo != 0) { + if ((echo = (char) Display.wcsToMbcs (echo, getCodePage ())) == 0) echo = '*'; + } + OS.SendMessage (handle, OS.EM_SETPASSWORDCHAR, echo, 0); + /* + * Bug in Windows. When the password character is changed, + * Windows does not redraw to show the new password character. + * The fix is to force a redraw when the character is set. + */ + OS.InvalidateRect (handle, null, true); +} + +/** + * Sets the editable state. + * + * @param editable the new editable state + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setEditable (boolean editable) { + checkWidget (); + style &= ~SWT.READ_ONLY; + if (!editable) style |= SWT.READ_ONLY; + OS.SendMessage (handle, OS.EM_SETREADONLY, editable ? 0 : 1, 0); +} + +public void setFont (Font font) { + checkWidget (); + super.setFont (font); + setTabStops (tabs); + setMargins (); +} + +void setMargins () { + /* + * Bug in Windows. When EM_SETCUEBANNER is used to set the + * banner text, the control does not take into account the + * margins, causing the first character to be clipped. The + * fix is to set the margins to zero. + */ + if ((style & SWT.SEARCH) != 0) { + if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) { + OS.SendMessage (handle, OS.EM_SETMARGINS, OS.EC_LEFTMARGIN | OS.EC_RIGHTMARGIN, 0); + } + } +} + +/** + * Sets the widget message. The message text is displayed + * as a hint for the user, indicating the purpose of the field. + * <p> + * Typically this is used in conjunction with <code>SWT.SEARCH</code>. + * </p> + * + * @param message the new message + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the message is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.3 + */ +public void setMessage (String message) { + checkWidget (); + if (message == null) error (SWT.ERROR_NULL_ARGUMENT); + this.message = message; + if (!OS.IsWinCE) { + if (OS.WIN32_VERSION >= OS.VERSION (6, 0)) { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) == 0) { + int length = message.length (); + char [] chars = new char [length + 1]; + message.getChars(0, length, chars, 0); + OS.SendMessage (handle, OS.EM_SETCUEBANNER, 0, chars); + } + } else { + OS.InvalidateRect (handle, null, true); + } + } +} + +/** + * Sets the orientation of the receiver, which must be one + * of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>. + * <p> + * Note: This operation is a hint and is not supported on + * platforms that do not have this concept. + * </p> + * + * @param orientation new orientation style + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 2.1.2 + */ +public void setOrientation (int orientation) { + checkWidget(); + if (OS.IsWinCE) return; + if (OS.WIN32_VERSION < OS.VERSION (4, 10)) return; + int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT; + if ((orientation & flags) == 0 || (orientation & flags) == flags) return; + style &= ~flags; + style |= orientation & flags; + int bits = OS.GetWindowLong (handle, OS.GWL_EXSTYLE); + if ((style & SWT.RIGHT_TO_LEFT) != 0) { + bits |= OS.WS_EX_RTLREADING | OS.WS_EX_LEFTSCROLLBAR; + } else { + bits &= ~(OS.WS_EX_RTLREADING | OS.WS_EX_LEFTSCROLLBAR); + } + OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits); + fixAlignment (); +} + +/** + * Sets the selection. + * <p> + * Indexing is zero based. The range of + * a selection is from 0..N where N is + * the number of characters in the widget. + * </p><p> + * Text selections are specified in terms of + * caret positions. In a text widget that + * contains N characters, there are N+1 caret + * positions, ranging from 0..N. This differs + * from other functions that address character + * position such as getText () that use the + * regular array indexing rules. + * </p> + * + * @param start new caret position + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setSelection (int start) { + checkWidget (); + if (!OS.IsUnicode && OS.IsDBLocale) start = wcsToMbcsPos (start); + OS.SendMessage (handle, OS.EM_SETSEL, start, start); + OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); +} + +/** + * Sets the selection to the range specified + * by the given start and end indices. + * <p> + * Indexing is zero based. The range of + * a selection is from 0..N where N is + * the number of characters in the widget. + * </p><p> + * Text selections are specified in terms of + * caret positions. In a text widget that + * contains N characters, there are N+1 caret + * positions, ranging from 0..N. This differs + * from other functions that address character + * position such as getText () that use the + * usual array indexing rules. + * </p> + * + * @param start the start of the range + * @param end the end of the range + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setSelection (int start, int end) { + checkWidget (); + if (!OS.IsUnicode && OS.IsDBLocale) { + start = wcsToMbcsPos (start); + end = wcsToMbcsPos (end); + } + OS.SendMessage (handle, OS.EM_SETSEL, start, end); + OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); +} + +public void setRedraw (boolean redraw) { + checkWidget (); + super.setRedraw (redraw); + /* + * Feature in Windows. When WM_SETREDRAW is used to turn + * redraw off, the edit control is not scrolled to show the + * i-beam. The fix is to detect that the i-beam has moved + * while redraw is turned off and force it to be visible + * when redraw is restored. + */ + if (!getDrawing ()) return; + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (!redraw) { + oldStart = start [0]; oldEnd = end [0]; + } else { + if (oldStart == start [0] && oldEnd == end [0]) return; + OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); + } +} + +/** + * Sets the selection to the range specified + * by the given point, where the x coordinate + * represents the start index and the y coordinate + * represents the end index. + * <p> + * Indexing is zero based. The range of + * a selection is from 0..N where N is + * the number of characters in the widget. + * </p><p> + * Text selections are specified in terms of + * caret positions. In a text widget that + * contains N characters, there are N+1 caret + * positions, ranging from 0..N. This differs + * from other functions that address character + * position such as getText () that use the + * usual array indexing rules. + * </p> + * + * @param selection the point + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the point is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setSelection (Point selection) { + checkWidget (); + if (selection == null) error (SWT.ERROR_NULL_ARGUMENT); + setSelection (selection.x, selection.y); +} + +/** + * Sets the number of tabs. + * <p> + * Tab stop spacing is specified in terms of the + * space (' ') character. The width of a single + * tab stop is the pixel width of the spaces. + * </p> + * + * @param tabs the number of tabs + * + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setTabs (int tabs) { + checkWidget (); + if (tabs < 0) return; + setTabStops (this.tabs = tabs); +} + +void setTabStops (int tabs) { + /* + * Feature in Windows. Windows expects the tab spacing in + * dialog units so we must convert from space widths. Due + * to round off error, the tab spacing may not be the exact + * number of space widths, depending on the font. + */ + int width = (getTabWidth (tabs) * 4) / OS.LOWORD (OS.GetDialogBaseUnits ()); + OS.SendMessage (handle, OS.EM_SETTABSTOPS, 1, new int [] {width}); +} + +/** + * Sets the contents of the receiver to the given string. If the receiver has style + * SINGLE and the argument contains multiple lines of text, the result of this + * operation is undefined and may vary from platform to platform. + * + * @param string the new text + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the string is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setText (String string) { + checkWidget (); + if (string == null) error (SWT.ERROR_NULL_ARGUMENT); + string = Display.withCrLf (string); + if (hooks (SWT.Verify) || filters (SWT.Verify)) { + int length = OS.GetWindowTextLength (handle); + string = verifyText (string, 0, length, null); + if (string == null) return; + } + int limit = (int)/*64*/OS.SendMessage (handle, OS.EM_GETLIMITTEXT, 0, 0) & 0x7FFFFFFF; + if (string.length () > limit) string = string.substring (0, limit); + TCHAR buffer = new TCHAR (getCodePage (), string, true); + OS.SetWindowText (handle, buffer); + /* + * Bug in Windows. When the widget is multi line + * text widget, it does not send a WM_COMMAND with + * control code EN_CHANGE from SetWindowText () to + * notify the application that the text has changed. + * The fix is to send the event. + */ + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) != 0) { + sendEvent (SWT.Modify); + // widget could be disposed at this point + } +} + +/** + * Sets the maximum number of characters that the receiver + * is capable of holding to be the argument. + * <p> + * Instead of trying to set the text limit to zero, consider + * creating a read-only text widget. + * </p><p> + * To reset this value to the default, use <code>setTextLimit(Text.LIMIT)</code>. + * Specifying a limit value larger than <code>Text.LIMIT</code> sets the + * receiver's limit to <code>Text.LIMIT</code>. + * </p> + * + * @param limit new text limit + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #LIMIT + */ +public void setTextLimit (int limit) { + checkWidget (); + if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO); + OS.SendMessage (handle, OS.EM_SETLIMITTEXT, limit, 0); +} + +/** + * Sets the zero-relative index of the line which is currently + * at the top of the receiver. This index can change when lines + * are scrolled or new lines are added and removed. + * + * @param index the index of the top item + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setTopIndex (int index) { + checkWidget (); + if ((style & SWT.SINGLE) != 0) return; + int count = (int)/*64*/OS.SendMessage (handle, OS.EM_GETLINECOUNT, 0, 0); + index = Math.min (Math.max (index, 0), count - 1); + int topIndex = (int)/*64*/OS.SendMessage (handle, OS.EM_GETFIRSTVISIBLELINE, 0, 0); + OS.SendMessage (handle, OS.EM_LINESCROLL, 0, index - topIndex); +} + +/** + * Shows the selection. + * <p> + * If the selection is already showing + * in the receiver, this method simply returns. Otherwise, + * lines are scrolled until the selection is visible. + * </p> + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void showSelection () { + checkWidget (); + OS.SendMessage (handle, OS.EM_SCROLLCARET, 0, 0); +} + +String verifyText (String string, int start, int end, Event keyEvent) { + if (ignoreVerify) return string; + Event event = new Event (); + event.text = string; + event.start = start; + event.end = end; + if (keyEvent != null) { + event.character = keyEvent.character; + event.keyCode = keyEvent.keyCode; + event.stateMask = keyEvent.stateMask; + } + if (!OS.IsUnicode && OS.IsDBLocale) { + event.start = mbcsToWcsPos (start); + event.end = mbcsToWcsPos (end); + } + /* + * It is possible (but unlikely), that application + * code could have disposed the widget in the verify + * event. If this happens, answer null to cancel + * the operation. + */ + sendEvent (SWT.Verify, event); + if (!event.doit || isDisposed ()) return null; + return event.text; +} + +int wcsToMbcsPos (int wcsPos) { + if (wcsPos <= 0) return 0; + if (OS.IsUnicode) return wcsPos; + int cp = getCodePage (); + int wcsTotal = 0, mbcsTotal = 0; + byte [] buffer = new byte [128]; + String delimiter = getLineDelimiter (); + int delimiterSize = delimiter.length (); + int count = (int)/*64*/OS.SendMessageA (handle, OS.EM_GETLINECOUNT, 0, 0); + for (int line=0; line<count; line++) { + int wcsSize = 0; + int linePos = (int)/*64*/OS.SendMessageA (handle, OS.EM_LINEINDEX, line, 0); + int mbcsSize = (int)/*64*/OS.SendMessageA (handle, OS.EM_LINELENGTH, linePos, 0); + if (mbcsSize != 0) { + if (mbcsSize + delimiterSize > buffer.length) { + buffer = new byte [mbcsSize + delimiterSize]; + } + //ENDIAN + buffer [0] = (byte) (mbcsSize & 0xFF); + buffer [1] = (byte) (mbcsSize >> 8); + mbcsSize = (int)/*64*/OS.SendMessageA (handle, OS.EM_GETLINE, line, buffer); + wcsSize = OS.MultiByteToWideChar (cp, OS.MB_PRECOMPOSED, buffer, mbcsSize, null, 0); + } + if (line - 1 != count) { + for (int i=0; i<delimiterSize; i++) { + buffer [mbcsSize++] = (byte) delimiter.charAt (i); + } + wcsSize += delimiterSize; + } + if ((wcsTotal + wcsSize) >= wcsPos) { + wcsSize = 0; + int index = 0; + while (index < mbcsSize) { + if ((wcsTotal + wcsSize) == wcsPos) { + return mbcsTotal + index; + } + if (OS.IsDBCSLeadByte (buffer [index++])) index++; + wcsSize++; + } + return mbcsTotal + mbcsSize; + } + wcsTotal += wcsSize; + mbcsTotal += mbcsSize; + } + return mbcsTotal; +} + +int widgetStyle () { + int bits = super.widgetStyle () | OS.ES_AUTOHSCROLL; + if ((style & SWT.PASSWORD) != 0) bits |= OS.ES_PASSWORD; + if ((style & SWT.CENTER) != 0) bits |= OS.ES_CENTER; + if ((style & SWT.RIGHT) != 0) bits |= OS.ES_RIGHT; + if ((style & SWT.READ_ONLY) != 0) bits |= OS.ES_READONLY; + if ((style & SWT.SINGLE) != 0) { + /* + * Feature in Windows. When a text control is read-only, + * uses COLOR_3DFACE for the background . If the text + * controls single-line and is within a tab folder or + * some other themed control, using WM_ERASEBKGND and + * WM_CTRCOLOR to draw the theme background results in + * pixel corruption. The fix is to use an ES_MULTILINE + * text control instead. + */ + if ((style & SWT.READ_ONLY) != 0) { + if ((style & (SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { + if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) { + bits |= OS.ES_MULTILINE; + } + } + } + return bits; + } + bits |= OS.ES_MULTILINE | OS.ES_NOHIDESEL | OS.ES_AUTOVSCROLL; + if ((style & SWT.WRAP) != 0) bits &= ~(OS.WS_HSCROLL | OS.ES_AUTOHSCROLL); + return bits; +} + +TCHAR windowClass () { + return EditClass; +} + +int /*long*/ windowProc () { + return EditProc; +} + +int /*long*/ windowProc (int /*long*/ hwnd, int msg, int /*long*/ wParam, int /*long*/ lParam) { + if (msg == OS.EM_UNDO) { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) == 0) { + LRESULT result = wmClipboard (OS.EM_UNDO, wParam, lParam); + if (result != null) return result.value; + return callWindowProc (hwnd, OS.EM_UNDO, wParam, lParam); + } + } + if (msg == Display.SWT_RESTORECARET) { + callWindowProc (hwnd, OS.WM_KILLFOCUS, 0, 0); + callWindowProc (hwnd, OS.WM_SETFOCUS, 0, 0); + return 1; + } + return super.windowProc (hwnd, msg, wParam, lParam); +} + +LRESULT WM_CHAR (int /*long*/ wParam, int /*long*/ lParam) { + if (ignoreCharacter) return null; + LRESULT result = super.WM_CHAR (wParam, lParam); + if (result != null) return result; + + /* + * Bug in Windows. When the user types CTRL and BS + * in an edit control, a DEL character is generated. + * Rather than deleting the text, the DEL character + * is inserted into the control. The fix is to detect + * this case and not call the window proc. + */ + switch ((int)/*64*/wParam) { + case SWT.DEL: + if (OS.GetKeyState (OS.VK_CONTROL) < 0) { + return LRESULT.ZERO; + } + } + + /* + * Feature in Windows. For some reason, when the + * widget is a single line text widget, when the + * user presses tab, return or escape, Windows beeps. + * The fix is to look for these keys and not call + * the window proc. + */ + if ((style & SWT.SINGLE) != 0) { + switch ((int)/*64*/wParam) { + case SWT.CR: + postEvent (SWT.DefaultSelection); + // FALL THROUGH + case SWT.TAB: + case SWT.ESC: return LRESULT.ZERO; + } + } + return result; +} + +LRESULT WM_CLEAR (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_CLEAR (wParam, lParam); + if (result != null) return result; + return wmClipboard (OS.WM_CLEAR, wParam, lParam); +} + +LRESULT WM_CUT (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_CUT (wParam, lParam); + if (result != null) return result; + return wmClipboard (OS.WM_CUT, wParam, lParam); +} + +LRESULT WM_ERASEBKGND (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_ERASEBKGND (wParam, lParam); + if ((style & SWT.READ_ONLY) != 0) { + if ((style & (SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) != 0) { + Control control = findBackgroundControl (); + if (control == null && background == -1) { + if ((state & THEME_BACKGROUND) != 0) { + if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) { + control = findThemeControl (); + if (control != null) { + RECT rect = new RECT (); + OS.GetClientRect (handle, rect); + fillThemeBackground (wParam, control, rect); + return LRESULT.ONE; + } + } + } + } + } + } + } + return result; +} + +LRESULT WM_GETDLGCODE (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_GETDLGCODE (wParam, lParam); + if (result != null) return result; + + /* + * Bug in WinCE PPC. For some reason, sending WM_GETDLGCODE + * to a multi-line edit control causes it to ignore return and + * tab keys. The fix is to return the value which is normally + * returned by the text window proc on other versions of Windows. + */ + if (OS.IsPPC) { + if ((style & SWT.MULTI) != 0 && (style & SWT.READ_ONLY) == 0 && lParam == 0) { + return new LRESULT (OS.DLGC_HASSETSEL | OS.DLGC_WANTALLKEYS | OS.DLGC_WANTCHARS); + } + } + + /* + * Feature in Windows. Despite the fact that the + * edit control is read only, it still returns a + * dialog code indicating that it wants all keys. + * The fix is to detect this case and clear the bits. + * + * NOTE: A read only edit control processes arrow keys + * so DLGC_WANTARROWS should not be cleared. + */ + if ((style & SWT.READ_ONLY) != 0) { + int /*long*/ code = callWindowProc (handle, OS.WM_GETDLGCODE, wParam, lParam); + code &= ~(OS.DLGC_WANTALLKEYS | OS.DLGC_WANTTAB); + return new LRESULT (code); + } + return null; +} + +LRESULT WM_IME_CHAR (int /*long*/ wParam, int /*long*/ lParam) { + + /* Process a DBCS character */ + Display display = this.display; + display.lastKey = 0; + display.lastAscii = (int)/*64*/wParam; + display.lastVirtual = display.lastNull = display.lastDead = false; + if (!sendKeyEvent (SWT.KeyDown, OS.WM_IME_CHAR, wParam, lParam)) { + return LRESULT.ZERO; + } + + /* + * Feature in Windows. The Windows text widget uses + * two 2 WM_CHAR's to process a DBCS key instead of + * using WM_IME_CHAR. The fix is to allow the text + * widget to get the WM_CHAR's but ignore sending + * them to the application. + */ + ignoreCharacter = true; + int /*long*/ result = callWindowProc (handle, OS.WM_IME_CHAR, wParam, lParam); + MSG msg = new MSG (); + int flags = OS.PM_REMOVE | OS.PM_NOYIELD | OS.PM_QS_INPUT | OS.PM_QS_POSTMESSAGE; + while (OS.PeekMessage (msg, handle, OS.WM_CHAR, OS.WM_CHAR, flags)) { + OS.TranslateMessage (msg); + OS.DispatchMessage (msg); + } + ignoreCharacter = false; + + sendKeyEvent (SWT.KeyUp, OS.WM_IME_CHAR, wParam, lParam); + // widget could be disposed at this point + display.lastKey = display.lastAscii = 0; + return new LRESULT (result); +} + +LRESULT WM_LBUTTONDBLCLK (int /*long*/ wParam, int /*long*/ lParam) { + /* + * Prevent Windows from processing WM_LBUTTONDBLCLK + * when double clicking behavior is disabled by not + * calling the window proc. + */ + LRESULT result = null; + sendMouseEvent (SWT.MouseDown, 1, handle, OS.WM_LBUTTONDOWN, wParam, lParam); + if (!sendMouseEvent (SWT.MouseDoubleClick, 1, handle, OS.WM_LBUTTONDBLCLK, wParam, lParam)) { + result = LRESULT.ZERO; + } + if (!display.captureChanged && !isDisposed ()) { + if (OS.GetCapture () != handle) OS.SetCapture (handle); + } + if (!doubleClick) return LRESULT.ZERO; + + /* + * Bug in Windows. When the last line of text in the + * widget is double clicked and the line is empty, Windows + * hides the i-beam then moves it to the first line in + * the widget but does not scroll to show the user. + * If the user types without clicking the mouse, invalid + * characters are displayed at the end of each line of + * text in the widget. The fix is to detect this case + * and avoid calling the window proc. + */ + int [] start = new int [1], end = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (start [0] == end [0]) { + int length = OS.GetWindowTextLength (handle); + if (length == start [0]) { + int code = (int)/*64*/OS.SendMessage (handle, OS.EM_LINELENGTH, length, 0); + if (code == 0) return LRESULT.ZERO; + } + } + return result; +} + +LRESULT WM_LBUTTONDOWN (int /*long*/ wParam, int /*long*/ lParam) { + if (OS.IsPPC) { + LRESULT result = null; + Display display = this.display; + display.captureChanged = false; + boolean dispatch = sendMouseEvent (SWT.MouseDown, 1, handle, OS.WM_LBUTTONDOWN, wParam, lParam); + /* + * Note: On WinCE PPC, only attempt to recognize the gesture for + * a context menu when the control contains a valid menu or there + * are listeners for the MenuDetect event. + * + * Note: On WinCE PPC, the gesture that brings up a popup menu + * on the text widget must keep the current text selection. As a + * result, the window proc is only called if the menu is not shown. + */ + boolean hasMenu = menu != null && !menu.isDisposed (); + if (hasMenu || hooks (SWT.MenuDetect)) { + int x = OS.GET_X_LPARAM (lParam); + int y = OS.GET_Y_LPARAM (lParam); + SHRGINFO shrg = new SHRGINFO (); + shrg.cbSize = SHRGINFO.sizeof; + shrg.hwndClient = handle; + shrg.ptDown_x = x; + shrg.ptDown_y = y; + shrg.dwFlags = OS.SHRG_RETURNCMD; + int type = OS.SHRecognizeGesture (shrg); + if (type == OS.GN_CONTEXTMENU) { + showMenu (x, y); + return LRESULT.ONE; + } + } + if (dispatch) { + result = new LRESULT (callWindowProc (handle, OS.WM_LBUTTONDOWN, wParam, lParam)); + } else { + result = LRESULT.ZERO; + } + if (!display.captureChanged && !isDisposed ()) { + if (OS.GetCapture () != handle) OS.SetCapture (handle); + } + return result; + } + return super.WM_LBUTTONDOWN (wParam, lParam); +} + +LRESULT WM_PASTE (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_PASTE (wParam, lParam); + if (result != null) return result; + return wmClipboard (OS.WM_PASTE, wParam, lParam); +} + +LRESULT WM_UNDO (int /*long*/ wParam, int /*long*/ lParam) { + LRESULT result = super.WM_UNDO (wParam, lParam); + if (result != null) return result; + return wmClipboard (OS.WM_UNDO, wParam, lParam); +} + +LRESULT wmClipboard (int msg, int /*long*/ wParam, int /*long*/ lParam) { + if ((style & SWT.READ_ONLY) != 0) return null; + if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return null; + boolean call = false; + int [] start = new int [1], end = new int [1]; + String newText = null; + switch (msg) { + case OS.WM_CLEAR: + case OS.WM_CUT: + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + if (start [0] != end [0]) { + newText = ""; + call = true; + } + break; + case OS.WM_PASTE: + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + newText = getClipboardText (); + break; + case OS.EM_UNDO: + case OS.WM_UNDO: + if (OS.SendMessage (handle, OS.EM_CANUNDO, 0, 0) != 0) { + ignoreModify = ignoreCharacter = true; + callWindowProc (handle, msg, wParam, lParam); + int length = OS.GetWindowTextLength (handle); + int [] newStart = new int [1], newEnd = new int [1]; + OS.SendMessage (handle, OS.EM_GETSEL, newStart, newEnd); + if (length != 0 && newStart [0] != newEnd [0]) { + TCHAR buffer = new TCHAR (getCodePage (), length + 1); + OS.GetWindowText (handle, buffer, length + 1); + newText = buffer.toString (newStart [0], newEnd [0] - newStart [0]); + } else { + newText = ""; + } + callWindowProc (handle, msg, wParam, lParam); + OS.SendMessage (handle, OS.EM_GETSEL, start, end); + ignoreModify = ignoreCharacter = false; + } + break; + } + if (newText != null) { + String oldText = newText; + newText = verifyText (newText, start [0], end [0], null); + if (newText == null) return LRESULT.ZERO; + if (!newText.equals (oldText)) { + if (call) { + callWindowProc (handle, msg, wParam, lParam); + } + newText = Display.withCrLf (newText); + TCHAR buffer = new TCHAR (getCodePage (), newText, true); + /* + * Feature in Windows. When an edit control with ES_MULTILINE + * style that does not have the WS_VSCROLL style is full (i.e. + * there is no space at the end to draw any more characters), + * EM_REPLACESEL sends a WM_CHAR with a backspace character + * to remove any further text that is added. This is an + * implementation detail of the edit control that is unexpected + * and can cause endless recursion when EM_REPLACESEL is sent + * from a WM_CHAR handler. The fix is to ignore calling the + * handler from WM_CHAR. + */ + ignoreCharacter = true; + OS.SendMessage (handle, OS.EM_REPLACESEL, 0, buffer); + ignoreCharacter = false; + return LRESULT.ZERO; + } + } + if (msg == OS.WM_UNDO) { + ignoreVerify = ignoreCharacter = true; + callWindowProc (handle, OS.WM_UNDO, wParam, lParam); + ignoreVerify = ignoreCharacter = false; + return LRESULT.ONE; + } + return null; +} + +LRESULT wmColorChild (int /*long*/ wParam, int /*long*/ lParam) { + if ((style & SWT.READ_ONLY) != 0) { + if ((style & (SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { + int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); + if ((bits & OS.ES_MULTILINE) != 0) { + Control control = findBackgroundControl (); + if (control == null && background == -1) { + if ((state & THEME_BACKGROUND) != 0) { + if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) { + control = findThemeControl (); + if (control != null) { + OS.SetTextColor (wParam, getForegroundPixel ()); + OS.SetBkColor (wParam, getBackgroundPixel ()); + OS.SetBkMode (wParam, OS.TRANSPARENT); + return new LRESULT (OS.GetStockObject (OS.NULL_BRUSH)); + } + } + } + } + } + } + } + return super.wmColorChild (wParam, lParam); +} + +LRESULT wmCommandChild (int /*long*/ wParam, int /*long*/ lParam) { + int code = OS.HIWORD (wParam); + switch (code) { + case OS.EN_CHANGE: + if (findImageControl () != null) { + OS.InvalidateRect (handle, null, true); + } + if (ignoreModify) break; + /* + * It is possible (but unlikely), that application + * code could have disposed the widget in the modify + * event. If this happens, end the processing of the + * Windows message by returning zero as the result of + * the window proc. + */ + sendEvent (SWT.Modify); + if (isDisposed ()) return LRESULT.ZERO; + break; + case OS.EN_ALIGN_LTR_EC: + style &= ~SWT.RIGHT_TO_LEFT; + style |= SWT.LEFT_TO_RIGHT; + fixAlignment (); + break; + case OS.EN_ALIGN_RTL_EC: + style &= ~SWT.LEFT_TO_RIGHT; + style |= SWT.RIGHT_TO_LEFT; + fixAlignment (); + break; + } + return super.wmCommandChild (wParam, lParam); +} + +} |