diff options
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java')
-rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java b/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java new file mode 100644 index 0000000000..94becf9755 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java @@ -0,0 +1,444 @@ +/******************************************************************************* + * Copyright (c) 2000, 2008 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.internal; + + +import org.eclipse.swt.SWT; +import java.io.*; + +/** + * This class is a placeholder for utility methods commonly + * used on J2SE platforms but not supported on some J2ME + * profiles. + * <p> + * It is part of our effort to provide support for both J2SE + * and J2ME platforms. + * </p> + * <p> + * IMPORTANT: some of the methods have been modified from their + * J2SE parents. Refer to the description of each method for + * specific changes. + * </p> + * <ul> + * <li>Exceptions thrown may differ since J2ME's set of + * exceptions is a subset of J2SE's one. + * </li> + * <li>The range of the mathematic functions is subject to + * change. + * </li> + * </ul> + */ +public final class Compatibility { + +/** + * Returns the PI constant as a double. + */ +public static double PI = (double)3.141592653589793; + +/** + * Sine table + * <p> + * Values represent sine for each degree between 0 and 90. Values have + * been multiplied by 65536 and rounded. + * </p> + */ +static int[] sineTable = { + 0, 1143, 2287, 3429, 4571, 5711, 6850, 7986, 9120, 10252, // 0 to 9 degrees + 11380, 12504, 13625, 14742, 15854, 16961, 18064, 19160, 20251, 21336, // 10 to 19 degrees + 22414, 23486, 24550, 25606, 26655, 27696, 28729, 29752, 30767, 31772, // 20 to 29 degrees + 32767, 33753, 34728, 35693, 36647, 37589, 38521, 39440, 40347, 41243, // 30 to 39 degrees + 42125, 42995, 43852, 44695, 45525, 46340, 47142, 47929, 48702, 49460, // 40 to 49 degrees + 50203, 50931, 51643, 52339, 53019, 53683, 54331, 54963, 55577, 56175, // 50 to 59 degrees + 56755, 57319, 57864, 58393, 58903, 59395, 59870, 60326, 60763, 61183, // 60 to 69 degrees + 61583, 61965, 62328, 62672, 62997, 63302, 63589, 63856, 64103, 64331, // 70 to 79 degrees + 64540, 64729, 64898, 65047, 65176, 65286, 65376, 65446, 65496, 65526, // 80 to 89 degrees + 65536 }; // 90 degrees + +/** + * Answers the length of the side adjacent to the given angle + * of a right triangle. In other words, it returns the integer + * conversion of length * cos (angle). + * <p> + * IMPORTANT: the j2me version has an additional restriction on + * the argument. length must be between -32767 and 32767 (inclusive). + * </p> + * + * @param angle the angle in degrees + * @param length the length of the triangle's hypotenuse + * @return the integer conversion of length * cos (angle) + */ +public static int cos(int angle, int length) { + return sin(90 - angle, length); +} + +/** + * Answers the length of the side opposite to the given angle + * of a right triangle. In other words, it returns the integer + * conversion of length * sin (angle). + * <p> + * IMPORTANT: the j2me version has an additional restriction on + * the argument. length must be between -32767 and 32767 (inclusive). + * </p> + * + * @param angle the angle in degrees + * @param length the length of the triangle's hypotenuse + * @return the integer conversion of length * sin (angle) + */ +public static int sin(int angle, int length) { + if (length < -32767 || length > 32767) { + SWT.error(SWT.ERROR_INVALID_RANGE); + } + if (angle < 0 || angle >= 360) { + angle = angle % 360; + if (angle < 0) angle += 360; + } + + int sineValue; + if (angle >= 0 && angle < 90) sineValue = sineTable[angle]; + else if (angle >= 90 && angle < 180) sineValue = sineTable[180 - angle]; + else if (angle >= 180 && angle < 270) sineValue = 0 - sineTable[angle - 180]; + else { + // angle >= 270 && angle < 360 + sineValue = 0 - sineTable[360 - angle]; + } + + return (sineValue * length) >> 16; +} + +/** + * Answers the most negative (i.e. closest to negative infinity) + * integer value which is greater than the number obtained by dividing + * the first argument p by the second argument q. + * + * @param p numerator + * @param q denominator (must be different from zero) + * @return the ceiling of the rational number p / q. + */ +public static int ceil(int p, int q) { + int res = p / q; + if ((p % q == 0) || + (res < 0) || + ((res == 0) && ((p < 0 && q > 0) || (p > 0 && q < 0)))) + return res; + else + return res + 1; +} + +/** + * Answers the most positive (i.e. closest to positive infinity) + * integer value which is less than the number obtained by dividing + * the first argument p by the second argument q. + * + * @param p numerator + * @param q denominator (must be different from zero) + * @return the floor of the rational number p / q. + */ +public static int floor(int p, int q) { + int res = p / q; + if ((p % q == 0) || + (res > 0) || + ((res == 0) && ((p > 0 && q > 0) || (p < 0 && q < 0)))) + return res; + else + return res - 1; +} + +/** + * Answers the result of rounding to the closest integer the number obtained + * by dividing the first argument p by the second argument q. + * <p> + * IMPORTANT: the j2me version has an additional restriction on + * the arguments. p must be within the range 0 - 32767 (inclusive). + * q must be within the range 1 - 32767 (inclusive). + * </p> + * + * @param p numerator + * @param q denominator (must be different from zero) + * @return the closest integer to the rational number p / q + */ +public static int round(int p, int q) { + if (p < 0 || p > 32767 || q < 1 || q > 32767) { + SWT.error(SWT.ERROR_INVALID_RANGE); + } + return (2 * p + q) / (2 * q); +} + +/** + * Returns 2 raised to the power of the argument. + * + * @param n an int value between 0 and 30 (inclusive) + * @return 2 raised to the power of the argument + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_RANGE - if the argument is not between 0 and 30 (inclusive)</li> + * </ul> + */ +public static int pow2(int n) { + if (n >= 1 && n <= 30) + return 2 << (n - 1); + else if (n != 0) { + SWT.error(SWT.ERROR_INVALID_RANGE); + } + return 1; +} + +/** + * Create an DeflaterOutputStream if such things are supported. + * + * @param stream the output stream + * @return a deflater stream or <code>null</code> + * @exception IOException + * + * @since 3.4 + */ +public static OutputStream newDeflaterOutputStream(OutputStream stream) throws IOException { + return null; +} + +/** + * Open a file if such things are supported. + * + * @param filename the name of the file to open + * @return a stream on the file if it could be opened. + */ +public static InputStream newFileInputStream (String filename) throws IOException { + throw new IOException(); +} + +/** + * Open a file if such things are supported. + * + * @param filename the name of the file to open + * @return a stream on the file if it could be opened. + */ +public static OutputStream newFileOutputStream (String filename) throws IOException { + throw new IOException(); +} + +/** + * Create an InflaterInputStream if such things are supported. + * + * @param stream the input stream + * @return a inflater stream or <code>null</code> + * @exception IOException + * + * @since 3.3 + */ +public static InputStream newInflaterInputStream(InputStream stream) throws IOException { + return null; +} + +/** + * Answers whether the character is a letter. + * + * @param c the character + * @return true when the character is a letter + */ +public static boolean isLetter(char c) { + return (Character.isUpperCase(c)) || (Character.isLowerCase(c)); +} + +/** + * Answers whether the character is a letter or a digit. + * + * @param c the character + * @return true when the character is a letter or a digit + */ +public static boolean isLetterOrDigit(char c) { + return isLetter(c) || Character.isDigit(c); +} + +/** + * Answers whether the character is a Unicode space character. + * + * @param c the character + * @return true when the character is a Unicode space character + */ +public static boolean isSpaceChar(char c) { + return c == ' '; +} + +/** + * Answers whether the character is whitespace character. + * + * @param c the character + * @return true when the character is a whitespace character + */ +public static boolean isWhitespace(char c) { + // Optimized case for ASCII + if ((c >= 0x1c && c <= 0x20) || (c >= 0x9 && c <= 0xd)) + return true; + return false; +} + +/** + * Execute a program in a separate platform process if the + * underlying platform support this. + * <p> + * The new process inherits the environment of the caller. + * </p> + * + * @param program the name of the program to execute + * + * @exception IOException + * if the program cannot be executed + * @exception SecurityException + * if the current SecurityManager disallows program execution + */ +public static void exec(String prog) throws java.io.IOException { + throw new IOException(); +} + +/** + * Answers whether the indicated file exists or not. + * + * @param parent the file's parent directory + * @param child the file's name + * @return true if the file exists + */ +public static boolean fileExists(String parent, String child) { + return false; +} + +/** + * Execute progArray[0] in a separate platform process if the + * underlying platform support this. + * <p> + * The new process inherits the environment of the caller. + * <p> + * + * @param progArray array containing the program to execute and its arguments + * + * @exception IOException + * if the program cannot be executed + * @exception SecurityException + * if the current SecurityManager disallows program execution + */ +public static void exec(String[] progArray) throws java.io.IOException{ + throw new IOException(); +} + +/** + * Returns the NLS'ed message for the given argument. This is only being + * called from SWT. + * + * @param key the key to look up + * @return the message for the given key + * + * @see SWT#getMessage + */ +public static String getMessage(String key) { + if (key == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); + if (key.equals("SWT_Yes")) return "Yes"; //$NON-NLS-1$ + if (key.equals("SWT_No")) return "No"; //$NON-NLS-1$ + if (key.equals("SWT_OK")) return "OK"; //$NON-NLS-1$ + if (key.equals("SWT_Cancel")) return "Cancel"; //$NON-NLS-1$ + if (key.equals("SWT_Abort")) return "Abort"; //$NON-NLS-1$ + if (key.equals("SWT_Retry")) return "Retry"; //$NON-NLS-1$ + if (key.equals("SWT_Ignore")) return "Ignore"; //$NON-NLS-1$ + if (key.equals("SWT_Sample")) return "Sample"; //$NON-NLS-1$ + if (key.equals("SWT_A_Sample_Text")) return "A Sample Text"; //$NON-NLS-1$ + if (key.equals("SWT_Selection")) return "Selection"; //$NON-NLS-1$ + if (key.equals("SWT_Current_Selection")) return "Current Selection"; //$NON-NLS-1$ + if (key.equals("SWT_Font")) return "Font"; //$NON-NLS-1$ + if (key.equals("SWT_Color")) return "Color"; //$NON-NLS-1$ + if (key.equals("SWT_Extended_style")) return "Extended style"; //$NON-NLS-1$ + if (key.equals("SWT_Size")) return "Size"; //$NON-NLS-1$ + if (key.equals("SWT_Style")) return "Style"; //$NON-NLS-1$ + if (key.equals("SWT_Save")) return "Save"; //$NON-NLS-1$ + if (key.equals("SWT_Character_set")) return "Character set"; //$NON-NLS-1$ + if (key.equals("SWT_ColorDialog_Title")) return "Colors"; //$NON-NLS-1$ + if (key.equals("SWT_FontDialog_Title")) return "Fonts"; //$NON-NLS-1$ + if (key.equals("SWT_FontSet")) return "Font Set"; //$NON-NLS-1$ + if (key.equals("SWT_NewFont")) return "New Font"; //$NON-NLS-1$ + if (key.equals("SWT_Remove")) return "Remove"; //$NON-NLS-1$ + if (key.equals("SWT_Up")) return "Up"; //$NON-NLS-1$ + if (key.equals("SWT_Down")) return "Down"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Western")) return "western"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_EastEuropean")) return "east european"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_SouthEuropean")) return "south european"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_NorthEuropean")) return "north european"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Cyrillic")) return "cyrillic"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Arabic")) return "arabic"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Greek")) return "greek"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Hebrew")) return "hebrew"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Turkish")) return "turkish"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Nordic")) return "nordic"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Thai")) return "thai"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_BalticRim")) return "baltic rim"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Celtic")) return "celtic"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Euro")) return "euro"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Romanian")) return "romanian"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_SimplifiedChinese")) return "simplified chinese"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_TraditionalChinese")) return "traditional chinese"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Japanese")) return "japanese"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Korean")) return "korean"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_Unicode")) return "unicode"; //$NON-NLS-1$ + if (key.equals("SWT_Charset_ASCII")) return "ASCII"; //$NON-NLS-1$ + if (key.equals("SWT_InputMethods")) return "Input Methods"; //$NON-NLS-1$ + if (key.equals("SWT_Password")) return "Password:"; //$NON-NLS-1$ + if (key.equals("SWT_Username")) return "User Name:"; //$NON-NLS-1$ + if (key.equals("SWT_Close")) return "Close"; //$NON-NLS-1$ + if (key.equals("SWT_Minimize")) return "Minimize"; //$NON-NLS-1$ + if (key.equals("SWT_Maximize")) return "Maximize"; //$NON-NLS-1$ + if (key.equals("SWT_Restore")) return "Restore"; //$NON-NLS-1$ + if (key.equals("SWT_ShowList")) return "Show List"; //$NON-NLS-1$ + if (key.equals("SWT_Download_Started")) return "Downloading..."; //$NON-NLS-1$ + return key; +} + +public static String getMessage(String key, Object[] args) { + if (key == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); + if (key.equals("SWT_Download_File")) return "Download: "+args[0]; //$NON-NLS-1$ + if (key.equals("SWT_Download_Location")) return "Saving "+args[0]+" from "+args[1]; //$NON-NLS-1$ + if (key.equals("SWT_Download_Status")) return "Download: "+args[0]+" KB of "+args[1]+" KB"; //$NON-NLS-1$ + return key; +} + +/** + * Interrupt the current thread. + * <p> + * Note that this is not available on CLDC. + * </p> + */ +public static void interrupt() { +} + +/** + * Compares two instances of class String ignoring the case of the + * characters and answers if they are equal. + * + * @param s1 string + * @param s2 string + * @return true if the two instances of class String are equal + */ +public static boolean equalsIgnoreCase(String s1, String s2) { + if (s1 == s2) return true; + if (s2 == null || s1.length() != s2.length()) return false; + + char[] cArray1 = s1.toCharArray(); + char[] cArray2 = s2.toCharArray(); + int length = s1.length(); + char c1, c2; + + for (int index = 0; index < length; index++) { + c1 = cArray1[index]; + c2 = cArray2[index]; + if (c1 != c2 && + Character.toUpperCase(c1) != Character.toUpperCase(c2) && + Character.toLowerCase(c1) != Character.toLowerCase(c2)) { + return false; + } + } + return true; +} + +} |