Mercurial > projects > dwt-win
annotate dwt/internal/BidiUtil.d @ 212:ab60f3309436
reverted the char[] to String and use the an alias.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 05 May 2008 00:12:38 +0200 |
| parents | 184ab53b7785 |
| children | 36f5cb12e1a2 |
| rev | line source |
|---|---|
| 154 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2007 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 *******************************************************************************/ | |
| 13 module dwt.internal.BidiUtil; | |
| 14 | |
| 15 | |
| 16 import dwt.DWT; | |
| 17 import dwt.graphics.GC; | |
| 18 import dwt.internal.win32.OS; | |
| 19 | |
| 20 import tango.util.Convert; | |
| 21 import dwt.dwthelper.utils; | |
| 22 import dwt.dwthelper.Runnable; | |
| 23 | |
| 24 /* | |
| 25 * Wraps Win32 API used to bidi enable the StyledText widget. | |
| 26 */ | |
| 27 public class BidiUtil { | |
| 28 | |
| 29 // Keyboard language ids | |
| 30 public static const int KEYBOARD_NON_BIDI = 0; | |
| 31 public static const int KEYBOARD_BIDI = 1; | |
| 32 | |
| 33 // bidi flag | |
| 34 static int isBidiPlatform_ = -1; | |
| 35 | |
| 36 // getRenderInfo flag values | |
| 37 public static const int CLASSIN = 1; | |
| 38 public static const int LINKBEFORE = 2; | |
| 39 public static const int LINKAFTER = 4; | |
| 40 | |
| 41 // variables used for providing a listener mechanism for keyboard language | |
| 42 // switching | |
| 43 static Runnable[HWND] languageMap; | |
| 44 static Runnable[HWND] keyMap; | |
| 45 static WNDPROC[HWND] oldProcMap; | |
| 46 /* | |
| 47 * This code is intentionally commented. In order | |
| 48 * to support CLDC, .class cannot be used because | |
| 49 * it does not compile on some Java compilers when | |
| 50 * they are targeted for CLDC. | |
| 51 */ | |
| 52 // static Callback callback = new Callback (BidiUtil.class, "windowProc", 4); | |
|
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ab60f3309436
reverted the char[] to String and use the an alias.
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parents:
197
diff
changeset
|
53 static const String CLASS_NAME = "org.eclipse.swt.internal.BidiUtil"; //$NON-NLS-1$ |
| 154 | 54 // static this() { |
| 55 // try { | |
| 56 // callback = new Callback (Class.forName (CLASS_NAME), "windowProc", 4); //$NON-NLS-1$ | |
| 57 // if (callback.getAddress () is 0) DWT.error (DWT.ERROR_NO_MORE_CALLBACKS); | |
| 58 // } catch (ClassNotFoundException e) {} | |
| 59 // } | |
| 60 | |
| 61 // GetCharacterPlacement constants | |
| 62 static const int GCP_REORDER = 0x0002; | |
| 63 static const int GCP_GLYPHSHAPE = 0x0010; | |
| 64 static const int GCP_LIGATE = 0x0020; | |
| 65 static const int GCP_CLASSIN = 0x00080000; | |
| 66 static const byte GCPCLASS_ARABIC = 2; | |
| 67 static const byte GCPCLASS_HEBREW = 2; | |
| 68 static const byte GCPCLASS_LOCALNUMBER = 4; | |
| 69 static const byte GCPCLASS_LATINNUMBER = 5; | |
| 70 static const int GCPGLYPH_LINKBEFORE = 0x8000; | |
| 71 static const int GCPGLYPH_LINKAFTER = 0x4000; | |
| 72 // ExtTextOut constants | |
| 73 static const int ETO_CLIPPED = 0x4; | |
| 74 static const int ETO_GLYPH_INDEX = 0x0010; | |
| 75 // Windows primary language identifiers | |
| 76 static const int LANG_ARABIC = 0x01; | |
| 77 static const int LANG_HEBREW = 0x0d; | |
| 78 // code page identifiers | |
|
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ab60f3309436
reverted the char[] to String and use the an alias.
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parents:
197
diff
changeset
|
79 static const String CD_PG_HEBREW = "1255"; //$NON-NLS-1$ |
|
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
197
diff
changeset
|
80 static const String CD_PG_ARABIC = "1256"; //$NON-NLS-1$ |
| 154 | 81 // ActivateKeyboard constants |
| 82 static const int HKL_NEXT = 1; | |
| 83 static const int HKL_PREV = 0; | |
| 84 | |
| 85 /* | |
| 86 * Public character class constants are the same as Windows | |
| 87 * platform constants. | |
| 88 * Saves conversion of class array in getRenderInfo to arbitrary | |
| 89 * constants for now. | |
| 90 */ | |
| 91 public static const int CLASS_HEBREW = GCPCLASS_ARABIC; | |
| 92 public static const int CLASS_ARABIC = GCPCLASS_HEBREW; | |
| 93 public static const int CLASS_LOCALNUMBER = GCPCLASS_LOCALNUMBER; | |
| 94 public static const int CLASS_LATINNUMBER = GCPCLASS_LATINNUMBER; | |
| 95 public static const int REORDER = GCP_REORDER; | |
| 96 public static const int LIGATE = GCP_LIGATE; | |
| 97 public static const int GLYPHSHAPE = GCP_GLYPHSHAPE; | |
| 98 | |
| 99 /** | |
| 100 * Adds a language listener. The listener will get notified when the language of | |
| 101 * the keyboard changes (via Alt-Shift on Win platforms). Do this by creating a | |
| 102 * window proc for the Control so that the window messages for the Control can be | |
| 103 * monitored. | |
| 104 * <p> | |
| 105 * | |
| 106 * @param hwnd the handle of the Control that is listening for keyboard language | |
| 107 * changes | |
| 108 * @param runnable the code that should be executed when a keyboard language change | |
| 109 * occurs | |
| 110 */ | |
| 111 public static void addLanguageListener (HWND hwnd, Runnable runnable) { | |
| 112 languageMap[hwnd] = runnable; | |
| 113 subclass(hwnd); | |
| 114 } | |
| 115 /** | |
| 116 * Proc used for OS.EnumSystemLanguageGroups call during isBidiPlatform test. | |
| 117 */ | |
| 118 static extern(Windows) int EnumSystemLanguageGroupsProc(uint lpLangGrpId, wchar* lpLangGrpIdString, wchar* lpLangGrpName, uint options, int lParam) { | |
| 119 if (lpLangGrpId is OS.LGRPID_HEBREW) { | |
| 120 isBidiPlatform_ = 1; | |
| 121 return 0; | |
| 122 } | |
| 123 if (lpLangGrpId is OS.LGRPID_ARABIC) { | |
| 124 isBidiPlatform_ = 1; | |
| 125 return 0; | |
| 126 } | |
| 127 return 1; | |
| 128 } | |
| 129 /** | |
| 130 * Wraps the ExtTextOut function. | |
| 131 * <p> | |
| 132 * | |
| 133 * @param gc the gc to use for rendering | |
| 134 * @param renderBuffer the glyphs to render as an array of characters | |
| 135 * @param renderDx the width of each glyph in renderBuffer | |
| 136 * @param x x position to start rendering | |
| 137 * @param y y position to start rendering | |
| 138 */ | |
| 139 public static void drawGlyphs(GC gc, wchar[] renderBuffer, int[] renderDx, int x, int y) { | |
| 140 int length_ = renderDx.length; | |
| 141 | |
| 142 if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) { | |
| 143 if (OS.GetLayout (gc.handle) !is 0) { | |
| 144 reverse(renderDx); | |
| 145 renderDx[length_-1]--; //fixes bug 40006 | |
| 146 reverse(renderBuffer); | |
| 147 } | |
| 148 } | |
| 149 // render transparently to avoid overlapping segments. fixes bug 40006 | |
| 150 int oldBkMode = OS.SetBkMode(gc.handle, OS.TRANSPARENT); | |
| 151 OS.ExtTextOutW(gc.handle, x, y, ETO_GLYPH_INDEX , null, renderBuffer.ptr, renderBuffer.length, renderDx.ptr); | |
| 152 OS.SetBkMode(gc.handle, oldBkMode); | |
| 153 } | |
| 154 /** | |
| 155 * Return ordering and rendering information for the given text. Wraps the GetFontLanguageInfo | |
| 156 * and GetCharacterPlacement functions. | |
| 157 * <p> | |
| 158 * | |
| 159 * @param gc the GC to use for measuring of this line, input parameter | |
| 160 * @param text text that bidi data should be calculated for, input parameter | |
| 161 * @param order an array of integers representing the visual position of each character in | |
| 162 * the text array, output parameter | |
| 163 * @param classBuffer an array of integers representing the type (e.g., ARABIC, HEBREW, | |
| 164 * LOCALNUMBER) of each character in the text array, input/output parameter | |
| 165 * @param dx an array of integers representing the pixel width of each glyph in the returned | |
| 166 * glyph buffer, output parameter | |
| 167 * @param flags an integer representing rendering flag information, input parameter | |
| 168 * @param offsets text segments that should be measured and reordered separately, input | |
| 169 * parameter. See org.eclipse.swt.custom.BidiSegmentEvent for details. | |
| 170 * @return buffer with the glyphs that should be rendered for the given text | |
| 171 */ | |
|
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ab60f3309436
reverted the char[] to String and use the an alias.
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parents:
197
diff
changeset
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172 public static char[] getRenderInfo(GC gc, String text, int[] order, byte[] classBuffer, int[] dx, int flags, int [] offsets) { |
| 154 | 173 auto fontLanguageInfo = OS.GetFontLanguageInfo(gc.handle); |
| 174 auto hHeap = OS.GetProcessHeap(); | |
| 175 int[8] lpCs; | |
| 176 int cs = OS.GetTextCharset(gc.handle); | |
| 177 bool isRightOriented = false; | |
| 178 if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) { | |
| 179 isRightOriented = OS.GetLayout(gc.handle) !is 0; | |
| 180 } | |
| 181 OS.TranslateCharsetInfo( cast(uint*)cs, cast(CHARSETINFO*)lpCs.ptr, OS.TCI_SRCCHARSET); | |
| 182 TCHAR[] textBuffer = StrToTCHARs(lpCs[1], text, false); | |
| 183 int byteCount = textBuffer.length; | |
| 184 bool linkBefore = (flags & LINKBEFORE) is LINKBEFORE; | |
| 185 bool linkAfter = (flags & LINKAFTER) is LINKAFTER; | |
| 186 | |
| 187 GCP_RESULTS result; | |
| 188 result.lStructSize = GCP_RESULTS.sizeof; | |
| 189 result.nGlyphs = byteCount; | |
| 190 auto lpOrder = result.lpOrder = cast(uint*)OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount * 4); | |
| 191 auto lpDx = result.lpDx = cast(int*)OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount * 4); | |
| 192 auto lpClass = result.lpClass = cast(char*)OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount); | |
| 193 auto lpGlyphs = result.lpGlyphs = cast(wchar*)OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount * 2); | |
| 194 | |
| 195 // set required dwFlags | |
| 196 int dwFlags = 0; | |
| 197 int glyphFlags = 0; | |
| 198 // Always reorder. We assume that if we are calling this function we're | |
| 199 // on a platform that supports bidi. Fixes 20690. | |
| 200 dwFlags |= GCP_REORDER; | |
| 201 if ((fontLanguageInfo & GCP_LIGATE) is GCP_LIGATE) { | |
| 202 dwFlags |= GCP_LIGATE; | |
| 203 glyphFlags |= 0; | |
| 204 } | |
| 205 if ((fontLanguageInfo & GCP_GLYPHSHAPE) is GCP_GLYPHSHAPE) { | |
| 206 dwFlags |= GCP_GLYPHSHAPE; | |
| 207 if (linkBefore) { | |
| 208 glyphFlags |= GCPGLYPH_LINKBEFORE; | |
| 209 } | |
| 210 if (linkAfter) { | |
| 211 glyphFlags |= GCPGLYPH_LINKAFTER; | |
| 212 } | |
| 213 } | |
| 214 byte[] lpGlyphs2; | |
| 215 if (linkBefore || linkAfter) { | |
| 216 lpGlyphs2 = new byte[2]; | |
| 217 lpGlyphs2[0]=cast(byte)glyphFlags; | |
| 218 lpGlyphs2[1]=cast(byte)(glyphFlags >> 8); | |
| 219 } | |
| 220 else { | |
| 221 lpGlyphs2 = [cast(byte) glyphFlags]; | |
| 222 } | |
| 223 OS.MoveMemory(result.lpGlyphs, lpGlyphs2.ptr, lpGlyphs2.length); | |
| 224 | |
| 225 if ((flags & CLASSIN) is CLASSIN) { | |
| 226 // set classification values for the substring | |
| 227 dwFlags |= GCP_CLASSIN; | |
| 228 OS.MoveMemory(result.lpClass, classBuffer.ptr, classBuffer.length); | |
| 229 } | |
| 230 | |
| 231 wchar[] glyphBuffer = new wchar[result.nGlyphs]; | |
| 232 int glyphCount = 0; | |
| 233 for (int i=0; i<offsets.length-1; i++) { | |
| 234 int offset = offsets [i]; | |
| 235 int length_ = offsets [i+1] - offsets [i]; | |
| 236 | |
| 237 // The number of glyphs expected is <= length (segment length); | |
| 238 // the actual number returned may be less in case of Arabic ligatures. | |
| 239 result.nGlyphs = length_; | |
| 240 TCHAR[] textBuffer2 = StrToTCHARs(lpCs[1], text.substring(offset, offset + length_), false); | |
| 241 OS.GetCharacterPlacement(gc.handle, textBuffer2.ptr, textBuffer2.length, 0, &result, dwFlags); | |
| 242 | |
| 243 if (dx !is null) { | |
| 244 int [] dx2 = new int [result.nGlyphs]; | |
| 245 OS.MoveMemory(dx2.ptr, result.lpDx, dx2.length * 4); | |
| 246 if (isRightOriented) { | |
| 247 reverse(dx2); | |
| 248 } | |
| 249 System.arraycopy (dx2, 0, dx, glyphCount, dx2.length); | |
| 250 } | |
| 251 if (order !is null) { | |
| 252 int [] order2 = new int [length_]; | |
| 253 OS.MoveMemory(order2.ptr, result.lpOrder, order2.length * 4); | |
| 254 translateOrder(order2, glyphCount, isRightOriented); | |
| 255 System.arraycopy (order2, 0, order, offset, length_); | |
| 256 } | |
| 257 if (classBuffer !is null) { | |
| 258 byte [] classBuffer2 = new byte [length_]; | |
| 259 OS.MoveMemory(classBuffer2.ptr, result.lpClass, classBuffer2.length); | |
| 260 System.arraycopy (classBuffer2, 0, classBuffer, offset, length_); | |
| 261 } | |
| 262 wchar[] glyphBuffer2 = new wchar[result.nGlyphs]; | |
| 263 OS.MoveMemory(glyphBuffer2.ptr, result.lpGlyphs, glyphBuffer2.length * 2); | |
| 264 if (isRightOriented) { | |
| 265 reverse(glyphBuffer2); | |
| 266 } | |
| 267 System.arraycopy (glyphBuffer2, 0, glyphBuffer, glyphCount, glyphBuffer2.length); | |
| 268 glyphCount += glyphBuffer2.length; | |
| 269 | |
| 270 // We concatenate successive results of calls to GCP. | |
| 271 // For Arabic, it is the only good method since the number of output | |
| 272 // glyphs might be less than the number of input characters. | |
| 273 // This assumes that the whole line is built by successive adjacent | |
| 274 // segments without overlapping. | |
| 275 result.lpOrder += length_ * 4; | |
| 276 result.lpDx += length_ * 4; | |
| 277 result.lpClass += length_; | |
| 278 result.lpGlyphs += glyphBuffer2.length * 2; | |
| 279 } | |
| 280 | |
| 281 /* Free the memory that was allocated. */ | |
| 282 OS.HeapFree(hHeap, 0, lpGlyphs); | |
| 283 OS.HeapFree(hHeap, 0, lpClass); | |
| 284 OS.HeapFree(hHeap, 0, lpDx); | |
| 285 OS.HeapFree(hHeap, 0, lpOrder); | |
| 286 return WCHARsToStr(glyphBuffer); | |
| 287 } | |
| 288 /** | |
| 289 * Return bidi ordering information for the given text. Does not return rendering | |
| 290 * information (e.g., glyphs, glyph distances). Use this method when you only need | |
| 291 * ordering information. Doing so will improve performance. Wraps the | |
| 292 * GetFontLanguageInfo and GetCharacterPlacement functions. | |
| 293 * <p> | |
| 294 * | |
| 295 * @param gc the GC to use for measuring of this line, input parameter | |
| 296 * @param text text that bidi data should be calculated for, input parameter | |
| 297 * @param order an array of integers representing the visual position of each character in | |
| 298 * the text array, output parameter | |
| 299 * @param classBuffer an array of integers representing the type (e.g., ARABIC, HEBREW, | |
| 300 * LOCALNUMBER) of each character in the text array, input/output parameter | |
| 301 * @param flags an integer representing rendering flag information, input parameter | |
| 302 * @param offsets text segments that should be measured and reordered separately, input | |
| 303 * parameter. See org.eclipse.swt.custom.BidiSegmentEvent for details. | |
| 304 */ | |
|
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ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
197
diff
changeset
|
305 public static void getOrderInfo(GC gc, String text, int[] order, byte[] classBuffer, int flags, int [] offsets) { |
| 154 | 306 int fontLanguageInfo = OS.GetFontLanguageInfo(gc.handle); |
| 307 auto hHeap = OS.GetProcessHeap(); | |
| 308 int[8] lpCs; | |
| 309 int cs = OS.GetTextCharset(gc.handle); | |
| 310 OS.TranslateCharsetInfo( cast(uint*) cs, cast(CHARSETINFO*)lpCs.ptr, OS.TCI_SRCCHARSET); | |
| 311 TCHAR[] textBuffer = StrToTCHARs(lpCs[1], text, false); | |
| 312 int byteCount = textBuffer.length; | |
| 313 bool isRightOriented = false; | |
| 314 if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) { | |
| 315 isRightOriented = OS.GetLayout(gc.handle) !is 0; | |
| 316 } | |
| 317 | |
| 318 GCP_RESULTS result; | |
| 319 result.lStructSize = GCP_RESULTS.sizeof; | |
| 320 result.nGlyphs = byteCount; | |
| 321 auto lpOrder = result.lpOrder = cast(uint*) OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount * 4); | |
| 322 auto lpClass = result.lpClass = cast(char*) OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount); | |
| 323 | |
| 324 // set required dwFlags, these values will affect how the text gets rendered and | |
| 325 // ordered | |
| 326 int dwFlags = 0; | |
| 327 // Always reorder. We assume that if we are calling this function we're | |
| 328 // on a platform that supports bidi. Fixes 20690. | |
| 329 dwFlags |= GCP_REORDER; | |
| 330 if ((fontLanguageInfo & GCP_LIGATE) is GCP_LIGATE) { | |
| 331 dwFlags |= GCP_LIGATE; | |
| 332 } | |
| 333 if ((fontLanguageInfo & GCP_GLYPHSHAPE) is GCP_GLYPHSHAPE) { | |
| 334 dwFlags |= GCP_GLYPHSHAPE; | |
| 335 } | |
| 336 if ((flags & CLASSIN) is CLASSIN) { | |
| 337 // set classification values for the substring, classification values | |
| 338 // can be specified on input | |
| 339 dwFlags |= GCP_CLASSIN; | |
| 340 OS.MoveMemory(result.lpClass, classBuffer.ptr, classBuffer.length); | |
| 341 } | |
| 342 | |
| 343 int glyphCount = 0; | |
| 344 for (int i=0; i<offsets.length-1; i++) { | |
| 345 int offset = offsets [i]; | |
| 346 int length_ = offsets [i+1] - offsets [i]; | |
| 347 // The number of glyphs expected is <= length (segment length); | |
| 348 // the actual number returned may be less in case of Arabic ligatures. | |
| 349 result.nGlyphs = length_; | |
| 350 TCHAR[] textBuffer2 = StrToTCHARs(lpCs[1], text.substring(offset, offset + length_), false); | |
| 351 OS.GetCharacterPlacement(gc.handle, textBuffer2.ptr, textBuffer2.length, 0, &result, dwFlags); | |
| 352 | |
| 353 if (order !is null) { | |
| 354 int [] order2 = new int [length_]; | |
| 355 OS.MoveMemory(order2.ptr, result.lpOrder, order2.length * 4); | |
| 356 translateOrder(order2, glyphCount, isRightOriented); | |
| 357 System.arraycopy (order2, 0, order, offset, length_); | |
| 358 } | |
| 359 if (classBuffer !is null) { | |
| 360 byte [] classBuffer2 = new byte [length_]; | |
| 361 OS.MoveMemory(classBuffer2.ptr, result.lpClass, classBuffer2.length); | |
| 362 System.arraycopy (classBuffer2, 0, classBuffer, offset, length_); | |
| 363 } | |
| 364 glyphCount += result.nGlyphs; | |
| 365 | |
| 366 // We concatenate successive results of calls to GCP. | |
| 367 // For Arabic, it is the only good method since the number of output | |
| 368 // glyphs might be less than the number of input characters. | |
| 369 // This assumes that the whole line is built by successive adjacent | |
| 370 // segments without overlapping. | |
| 371 result.lpOrder += length_ * 4; | |
| 372 result.lpClass += length_; | |
| 373 } | |
| 374 | |
| 375 /* Free the memory that was allocated. */ | |
| 376 OS.HeapFree(hHeap, 0, lpClass); | |
| 377 OS.HeapFree(hHeap, 0, lpOrder); | |
| 378 } | |
| 379 /** | |
| 380 * Return bidi attribute information for the font in the specified gc. | |
| 381 * <p> | |
| 382 * | |
| 383 * @param gc the gc to query | |
| 384 * @return bitwise OR of the REORDER, LIGATE and GLYPHSHAPE flags | |
| 385 * defined by this class. | |
| 386 */ | |
| 387 public static int getFontBidiAttributes(GC gc) { | |
| 388 int fontStyle = 0; | |
| 389 int fontLanguageInfo = OS.GetFontLanguageInfo(gc.handle); | |
| 390 if (((fontLanguageInfo & GCP_REORDER) !is 0)) { | |
| 391 fontStyle |= REORDER; | |
| 392 } | |
| 393 if (((fontLanguageInfo & GCP_LIGATE) !is 0)) { | |
| 394 fontStyle |= LIGATE; | |
| 395 } | |
| 396 if (((fontLanguageInfo & GCP_GLYPHSHAPE) !is 0)) { | |
| 397 fontStyle |= GLYPHSHAPE; | |
| 398 } | |
| 399 return fontStyle; | |
| 400 } | |
| 401 /** | |
| 402 * Return the active keyboard language type. | |
| 403 * <p> | |
| 404 * | |
| 405 * @return an integer representing the active keyboard language (KEYBOARD_BIDI, | |
| 406 * KEYBOARD_NON_BIDI) | |
| 407 */ | |
| 408 public static int getKeyboardLanguage() { | |
| 409 int layout = cast(int) OS.GetKeyboardLayout(0); | |
| 410 // only interested in low 2 bytes, which is the primary | |
| 411 // language identifier | |
| 412 layout = layout & 0x000000FF; | |
| 413 if (layout is LANG_HEBREW) return KEYBOARD_BIDI; | |
| 414 if (layout is LANG_ARABIC) return KEYBOARD_BIDI; | |
| 415 // return non-bidi for all other languages | |
| 416 return KEYBOARD_NON_BIDI; | |
| 417 } | |
| 418 /** | |
| 419 * Return the languages that are installed for the keyboard. | |
| 420 * <p> | |
| 421 * | |
| 422 * @return integer array with an entry for each installed language | |
| 423 */ | |
| 424 static void*[] getKeyboardLanguageList() { | |
| 425 int maxSize = 10; | |
| 426 void*[] tempList = new void*[maxSize]; | |
| 427 int size = OS.GetKeyboardLayoutList(maxSize, tempList.ptr); | |
| 428 void*[] list = new void*[size]; | |
| 429 System.arraycopy(tempList, 0, list, 0, size); | |
| 430 return list; | |
| 431 } | |
| 432 /** | |
| 433 * Return whether or not the platform supports a bidi language. Determine this | |
| 434 * by looking at the languages that are installed. | |
| 435 * <p> | |
| 436 * | |
| 437 * @return true if bidi is supported, false otherwise. Always | |
| 438 * false on Windows CE. | |
| 439 */ | |
| 440 public static bool isBidiPlatform() { | |
| 441 if (OS.IsWinCE) return false; | |
| 442 if (isBidiPlatform_ !is -1) return isBidiPlatform_ is 1; // already set | |
| 443 | |
| 444 isBidiPlatform_ = 0; | |
| 445 | |
| 446 // The following test is a workaround for bug report 27629. On WinXP, | |
| 447 // both bidi and complex script (e.g., Thai) languages must be installed | |
| 448 // at the same time. Since the bidi platform calls do not support | |
| 449 // double byte characters, there is no way to run Eclipse using the | |
| 450 // complex script languages on XP, so constrain this test to answer true | |
| 451 // only if a bidi input language is defined. Doing so will allow complex | |
| 452 // script languages to work (e.g., one can install bidi and complex script | |
| 453 // languages, but only install the Thai keyboard). | |
| 454 if (!isKeyboardBidi()) return false; | |
| 455 | |
| 456 //Callback callback = null; | |
| 457 //try { | |
| 458 //callback = new Callback (Class.forName (CLASS_NAME), "EnumSystemLanguageGroupsProc", 5); //$NON-NLS-1$ | |
| 459 //int lpEnumSystemLanguageGroupsProc = callback.getAddress (); | |
| 460 //if (lpEnumSystemLanguageGroupsProc is 0) DWT.error(DWT.ERROR_NO_MORE_CALLBACKS); | |
| 461 OS.EnumSystemLanguageGroups(&EnumSystemLanguageGroupsProc, OS.LGRPID_INSTALLED, 0); | |
| 462 //callback.dispose (); | |
| 463 //} catch (ClassNotFoundException e) { | |
| 464 //if (callback !is null) callback.dispose(); | |
| 465 //} | |
| 466 if (isBidiPlatform_ is 1) return true; | |
| 467 // need to look at system code page for NT & 98 platforms since EnumSystemLanguageGroups is | |
| 468 // not supported for these platforms | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
197
diff
changeset
|
469 String codePage = to!(String)(OS.GetACP()); |
| 154 | 470 if (CD_PG_ARABIC==/*eq*/codePage || CD_PG_HEBREW==/*eq*/codePage) { |
| 471 isBidiPlatform_ = 1; | |
| 472 } | |
| 473 return isBidiPlatform_ is 1; | |
| 474 } | |
| 475 /** | |
| 476 * Return whether or not the keyboard supports input of a bidi language. Determine this | |
| 477 * by looking at the languages that are installed for the keyboard. | |
| 478 * <p> | |
| 479 * | |
| 480 * @return true if bidi is supported, false otherwise. | |
| 481 */ | |
| 482 public static bool isKeyboardBidi() { | |
| 483 void*[] list = getKeyboardLanguageList(); | |
| 484 for (int i=0; i<list.length; i++) { | |
| 485 int id = cast(int)list[i] & 0x000000FF; | |
| 486 if ((id is LANG_ARABIC) || (id is LANG_HEBREW)) { | |
| 487 return true; | |
| 488 } | |
| 489 } | |
| 490 return false; | |
| 491 } | |
| 492 /** | |
| 493 * Removes the specified language listener. | |
| 494 * <p> | |
| 495 * | |
| 496 * @param hwnd the handle of the Control that is listening for keyboard language changes | |
| 497 */ | |
| 498 public static void removeLanguageListener (HWND hwnd) { | |
| 499 languageMap.remove(hwnd); | |
| 500 unsubclass(hwnd); | |
| 501 } | |
| 502 /** | |
| 503 * Switch the keyboard language to the specified language type. We do | |
| 504 * not distinguish between multiple bidi or multiple non-bidi languages, so | |
| 505 * set the keyboard to the first language of the given type. | |
| 506 * <p> | |
| 507 * | |
| 508 * @param language integer representing language. One of | |
| 509 * KEYBOARD_BIDI, KEYBOARD_NON_BIDI. | |
| 510 */ | |
| 511 public static void setKeyboardLanguage(int language) { | |
| 512 // don't switch the keyboard if it doesn't need to be | |
| 513 if (language is getKeyboardLanguage()) return; | |
| 514 | |
| 515 if (language is KEYBOARD_BIDI) { | |
| 516 // get the list of active languages | |
| 517 void*[] list = getKeyboardLanguageList(); | |
| 518 // set to first bidi language | |
| 519 for (int i=0; i<list.length; i++) { | |
| 520 int id = cast(int)list[i] & 0x000000FF; | |
| 521 if ((id is LANG_ARABIC) || (id is LANG_HEBREW)) { | |
| 522 OS.ActivateKeyboardLayout(list[i], 0); | |
| 523 return; | |
| 524 } | |
| 525 } | |
| 526 } else { | |
| 527 // get the list of active languages | |
| 528 void*[] list = getKeyboardLanguageList(); | |
| 529 // set to the first non-bidi language (anything not | |
| 530 // Hebrew or Arabic) | |
| 531 for (int i=0; i<list.length; i++) { | |
| 532 int id = cast(int)list[i] & 0x000000FF; | |
| 533 if ((id !is LANG_HEBREW) && (id !is LANG_ARABIC)) { | |
| 534 OS.ActivateKeyboardLayout(list[i], 0); | |
| 535 return; | |
| 536 } | |
| 537 } | |
| 538 } | |
| 539 } | |
| 540 /** | |
| 541 * Sets the orientation (writing order) of the specified control. Text will | |
| 542 * be right aligned for right to left writing order. | |
| 543 * <p> | |
| 544 * | |
| 545 * @param hwnd the handle of the Control to change the orientation of | |
| 546 * @param orientation one of DWT.RIGHT_TO_LEFT or DWT.LEFT_TO_RIGHT | |
| 547 * @return true if the orientation was changed, false if the orientation | |
| 548 * could not be changed | |
| 549 */ | |
| 550 public static bool setOrientation (HWND hwnd, int orientation) { | |
| 551 if (OS.IsWinCE) return false; | |
| 552 if (OS.WIN32_VERSION < OS.VERSION(4, 10)) return false; | |
| 553 int bits = OS.GetWindowLong (hwnd, OS.GWL_EXSTYLE); | |
| 554 if ((orientation & DWT.RIGHT_TO_LEFT) !is 0) { | |
| 555 bits |= OS.WS_EX_LAYOUTRTL; | |
| 556 } else { | |
| 557 bits &= ~OS.WS_EX_LAYOUTRTL; | |
| 558 } | |
| 559 OS.SetWindowLong (hwnd, OS.GWL_EXSTYLE, bits); | |
| 560 return true; | |
| 561 } | |
| 562 /** | |
| 563 * Override the window proc. | |
| 564 * | |
| 565 * @param hwnd control to override the window proc of | |
| 566 */ | |
| 567 static void subclass(HWND hwnd) { | |
| 568 HWND key = hwnd; | |
| 569 if ( ( key in oldProcMap ) is null) { | |
| 570 int oldProc = OS.GetWindowLong(hwnd, OS.GWL_WNDPROC); | |
| 571 oldProcMap[key] = cast(WNDPROC)oldProc; | |
| 572 WNDPROC t = &windowProc; // test signature | |
| 573 OS.SetWindowLong(hwnd, OS.GWL_WNDPROC, cast(int) &windowProc); | |
| 574 } | |
| 575 } | |
| 576 /** | |
| 577 * Reverse the character array. Used for right orientation. | |
| 578 * | |
| 579 * @param charArray character array to reverse | |
| 580 */ | |
| 581 static void reverse(wchar[] charArray) { | |
| 582 int length_ = charArray.length; | |
| 583 for (int i = 0; i <= (length_ - 1) / 2; i++) { | |
| 584 wchar tmp = charArray[i]; | |
| 585 charArray[i] = charArray[length_ - 1 - i]; | |
| 586 charArray[length_ - 1 - i] = tmp; | |
| 587 } | |
| 588 } | |
| 589 /** | |
| 590 * Reverse the integer array. Used for right orientation. | |
| 591 * | |
| 592 * @param intArray integer array to reverse | |
| 593 */ | |
| 594 static void reverse(int[] intArray) { | |
| 595 int length_ = intArray.length; | |
| 596 for (int i = 0; i <= (length_ - 1) / 2; i++) { | |
| 597 int tmp = intArray[i]; | |
| 598 intArray[i] = intArray[length_ - 1 - i]; | |
| 599 intArray[length_ - 1 - i] = tmp; | |
| 600 } | |
| 601 } | |
| 602 /** | |
| 603 * Adjust the order array so that it is relative to the start of the line. Also reverse the order array if the orientation | |
| 604 * is to the right. | |
| 605 * | |
| 606 * @param orderArray integer array of order values to translate | |
| 607 * @param glyphCount number of glyphs that have been processed for the current line | |
| 608 * @param isRightOriented flag indicating whether or not current orientation is to the right | |
| 609 */ | |
| 610 static void translateOrder(int[] orderArray, int glyphCount, bool isRightOriented) { | |
| 611 int maxOrder = 0; | |
| 612 int length_ = orderArray.length; | |
| 613 if (isRightOriented) { | |
| 614 for (int i=0; i<length_; i++) { | |
| 615 maxOrder = Math.max(maxOrder, orderArray[i]); | |
| 616 } | |
| 617 } | |
| 618 for (int i=0; i<length_; i++) { | |
| 619 if (isRightOriented) orderArray[i] = maxOrder - orderArray[i]; | |
| 620 orderArray [i] += glyphCount; | |
| 621 } | |
| 622 } | |
| 623 /** | |
| 624 * Remove the overridden the window proc. | |
| 625 * | |
| 626 * @param hwnd control to remove the window proc override for | |
| 627 */ | |
| 628 static void unsubclass(HWND hwnd) { | |
| 629 HWND key = hwnd; | |
| 630 if (( key in languageMap ) is null && ( key in keyMap ) is null) { | |
| 631 WNDPROC proc; | |
| 632 if( auto p = key in oldProcMap ){ | |
| 633 proc = *p; | |
| 634 oldProcMap.remove( key ); | |
| 635 } | |
| 636 if (proc is null) return; | |
| 637 OS.SetWindowLong(hwnd, OS.GWL_WNDPROC, cast(int)proc ); | |
| 638 } | |
| 639 } | |
| 640 /** | |
| 641 * Window proc to intercept keyboard language switch event (WS_INPUTLANGCHANGE) | |
| 642 * and widget orientation changes. | |
| 643 * Run the Control's registered runnable when the keyboard language is switched. | |
| 644 * | |
| 645 * @param hwnd handle of the control that is listening for the keyboard language | |
| 646 * change event | |
| 647 * @param msg window message | |
| 648 */ | |
| 649 static extern(Windows) int windowProc (HWND hwnd, uint msg, uint wParam, int lParam) { | |
| 650 HWND key = hwnd; | |
| 651 switch (msg) { | |
| 652 case 0x51 /*OS.WM_INPUTLANGCHANGE*/: | |
| 653 Runnable runnable = languageMap[key]; | |
| 654 if (runnable !is null) runnable.run (); | |
| 655 break; | |
| 155 | 656 default: |
| 154 | 657 } |
| 658 auto oldProc = oldProcMap[key]; | |
| 659 return OS.CallWindowProc ( oldProc, hwnd, msg, wParam, lParam); | |
| 660 } | |
| 661 | |
| 662 } |