IME object added

1 files changed, 253 insertions, 0 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/IME.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/IME.java
new file mode 100644
index 0000000000..33400b42dd
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/IME.java
@@ -0,0 +1,253 @@
+/*******************************************************************************
+ * Copyright (c) 2007 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.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.internal.*;
+import org.eclipse.swt.internal.gtk.*;
+
+
+public class IME extends Widget {
+	Canvas parent;
+	int caretOffset;
+	int startOffset;
+	int commitCount;
+	String text;
+	int [] ranges;
+	TextStyle [] styles;
+	boolean inComposition;
+
+/**
+ * Prevents uninitialized instances from being created outside the package.
+ */
+IME () {
+}
+
+/**
+ * 
+ * @see SWT
+ */
+public IME (Canvas parent, int style) {
+	super (parent, style);
+	this.parent = parent;
+	createWidget ();
+}
+
+void createWidget () {
+	text = "";
+	startOffset = -1;
+	if (parent.getIME () == null) {
+		parent.setIME (this);
+	}
+}
+
+public int getCaretOffset () {
+	checkWidget ();
+	return startOffset + caretOffset;
+}
+
+public int getCommitCount () {
+	checkWidget ();
+	return commitCount;
+}
+
+public int getCompositionOffset () {
+	checkWidget ();
+	return startOffset;
+}
+
+public int [] getRanges () {
+	checkWidget ();
+	return ranges != null ? ranges : new int [0];
+}
+
+public TextStyle [] getStyles () {
+	checkWidget ();
+	return styles != null ? styles : new TextStyle [0];
+}
+
+public String getText () {
+	checkWidget ();
+	return text;
+}
+
+public boolean getWideCaret() {
+	checkWidget ();
+	return false; 
+}
+
+int /*long*/ gtk_button_press_event (int /*long*/ widget, int /*long*/ event) {
+	if (isInlineIMEEnabled ()) {
+		int /*long*/ imHandle = imHandle ();
+		if (imHandle != 0) {
+			OS.gtk_im_context_reset (imHandle);
+		}
+	}
+	return 0;
+}
+
+int /*long*/ gtk_commit (int /*long*/ imcontext, int /*long*/ textPtr) {
+	boolean doit = true;
+	if (isInlineIMEEnabled ()) {
+		ranges = null;
+		styles = null;
+		caretOffset = commitCount = 0;
+		if (textPtr != 0 && inComposition) {
+			int length = OS.strlen (textPtr);
+			if (length != 0) {
+				byte [] buffer = new byte [length];
+				OS.memmove (buffer, textPtr, length);
+				char [] chars = Converter.mbcsToWcs (null, buffer);
+				Event event = new Event();
+				event.detail = SWT.COMPOSITION_CHANGED;
+				event.start = startOffset;
+				event.end = startOffset + text.length ();
+				event.text = text = chars != null ? new String (chars) : "";
+				commitCount = text.length();
+				sendEvent(SWT.ImeComposition, event);
+				doit = event.doit;
+				text = "";
+				startOffset = -1;
+				commitCount = 0;
+			}
+		}
+	}
+	inComposition = false;
+	return doit ? 0 : 1;
+}
+
+int /*long*/ gtk_preedit_changed (int /*long*/ imcontext) {
+	if (isInlineIMEEnabled ()) {
+		ranges = null;
+		styles = null;
+		commitCount = 0;
+		int /*long*/ imHandle = imHandle ();
+		int /*long*/ [] preeditString = new int /*long*/ [1];
+		int /*long*/ [] pangoAttrs = new int /*long*/ [1];
+		int [] cursorPos = new int [1];
+		OS.gtk_im_context_get_preedit_string (imHandle, preeditString, pangoAttrs, cursorPos);
+		caretOffset = cursorPos [0];
+		char [] chars = null;
+		if (preeditString [0] != 0) {
+			int length = OS.strlen (preeditString [0]);
+			byte [] buffer = new byte [length];
+			OS.memmove (buffer, preeditString [0], length);
+			chars = Converter.mbcsToWcs (null, buffer);
+			if (pangoAttrs [0] != 0) {
+				int count = 0;
+				int /*long*/ iterator = OS.pango_attr_list_get_iterator (pangoAttrs [0]);
+				while (OS.pango_attr_iterator_next (iterator)) count++;
+				OS.pango_attr_iterator_destroy (iterator);
+				ranges = new int [count * 2];
+				styles = new TextStyle [count];
+				iterator = OS.pango_attr_list_get_iterator (pangoAttrs [0]);
+				PangoAttrColor attrColor = new PangoAttrColor ();
+				PangoAttrInt attrInt = new PangoAttrInt ();
+				int [] start = new int [1];
+				int [] end = new int [1];
+				for (int i = 0; i < count; i++) {
+					OS.pango_attr_iterator_range (iterator, start, end);
+					ranges [i * 2] = (int)/*64*/OS.g_utf8_pointer_to_offset (preeditString [0], preeditString [0] + start [0]);
+					ranges [i * 2 + 1] = (int)/*64*/OS.g_utf8_pointer_to_offset (preeditString [0], preeditString [0] + end [0]) - ranges [i * 2];
+					styles [i] = new TextStyle (null, null, null);
+					int /*long*/ attr = OS.pango_attr_iterator_get (iterator, OS.PANGO_ATTR_FOREGROUND);
+					if (attr != 0) {
+						OS.memmove (attrColor, attr, PangoAttrColor.sizeof);
+						GdkColor color = new GdkColor ();
+						color.red = attrColor.color_red;
+						color.green = attrColor.color_green;
+						color.blue = attrColor.color_blue;
+						styles [i].foreground = Color.gtk_new (display, color);
+					}
+					attr = OS.pango_attr_iterator_get (iterator, OS.PANGO_ATTR_BACKGROUND);
+					if (attr != 0) {
+						OS.memmove (attrColor, attr, PangoAttrColor.sizeof);
+						GdkColor color = new GdkColor ();
+						color.red = attrColor.color_red;
+						color.green = attrColor.color_green;
+						color.blue = attrColor.color_blue;
+						styles [i].background = Color.gtk_new (display, color);
+					}
+					attr = OS.pango_attr_iterator_get (iterator, OS.PANGO_ATTR_UNDERLINE);
+					if (attr != 0) {
+						OS.memmove (attrInt, attr, PangoAttrInt.sizeof);
+						styles [i].underline = attrInt.value != OS.PANGO_UNDERLINE_NONE;;
+						styles [i].underlineStyle = SWT.UNDERLINE_SINGLE;
+						switch (attrInt.value) {
+							case OS.PANGO_UNDERLINE_DOUBLE:
+								styles [i].underlineStyle = SWT.UNDERLINE_DOUBLE;
+								break;
+							case OS.PANGO_UNDERLINE_ERROR:
+								styles [i].underlineStyle = SWT.UNDERLINE_ERROR;
+								break;
+						}
+						if (styles [i].underline) {
+							attr = OS.pango_attr_iterator_get(iterator, OS.PANGO_ATTR_UNDERLINE_COLOR);
+							if (attr != 0) {
+								OS.memmove (attrColor, attr, PangoAttrColor.sizeof);
+								GdkColor color = new GdkColor ();
+								color.red = attrColor.color_red;
+								color.green = attrColor.color_green;
+								color.blue = attrColor.color_blue;
+								styles [i].underlineColor = Color.gtk_new (display, color);
+							}
+						}
+					}
+					OS.pango_attr_iterator_next (iterator);
+				}
+				OS.pango_attr_iterator_destroy (iterator);
+				OS.pango_attr_list_unref (pangoAttrs [0]);	
+			}
+			OS.g_free (preeditString [0]);
+		}
+		if (chars != null) {
+			if (text.length() == 0) startOffset = -1;
+			if (startOffset == -1) {
+				Caret caret = parent.getCaret ();
+				startOffset = caret != null ? caret.getOffset () : 0;
+			}
+			inComposition = true;
+			Event event = new Event ();
+			event.detail = SWT.COMPOSITION_CHANGED;
+			event.start = startOffset;
+			event.end = startOffset + text.length ();
+			event.text = text = chars != null ? new String (chars) : "";
+			sendEvent (SWT.ImeComposition, event);
+		}
+		return 1;
+	}
+	return 0;
+}
+
+int /*long*/ imHandle () {
+	return parent.imHandle ();
+}
+
+boolean isInlineIMEEnabled () {
+	return hooks (SWT.ImeComposition);
+}
+
+void releaseParent () {
+	super.releaseParent ();
+	if (this == parent.getIME ()) parent.setIME (null);
+}
+
+void releaseWidget () {
+	super.releaseWidget ();
+	parent = null;
+	text = null;
+	styles = null;
+	ranges = null;
+}
+
+}