widget/cocoa/nsLookAndFeel.mm@ac0c01689b40
widget/cocoa/nsLookAndFeel.mm
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "nsLookAndFeel.h"
7 #include "nsCocoaFeatures.h"
8 #include "nsIServiceManager.h"
9 #include "nsNativeThemeColors.h"
10 #include "nsStyleConsts.h"
11 #include "nsCocoaFeatures.h"
12 #include "gfxFont.h"
13 #include "gfxFontConstants.h"
14 #include "mozilla/gfx/2D.h"
16 #import <Cocoa/Cocoa.h>
18 // This must be included last:
19 #include "nsObjCExceptions.h"
21 enum {
22 mozNSScrollerStyleLegacy = 0,
23 mozNSScrollerStyleOverlay = 1
24 };
25 typedef NSInteger mozNSScrollerStyle;
27 @interface NSScroller(AvailableSinceLion)
28 + (mozNSScrollerStyle)preferredScrollerStyle;
29 @end
31 nsLookAndFeel::nsLookAndFeel() : nsXPLookAndFeel()
32 {
33 }
35 nsLookAndFeel::~nsLookAndFeel()
36 {
37 }
39 static nscolor GetColorFromNSColor(NSColor* aColor)
40 {
41 NSColor* deviceColor = [aColor colorUsingColorSpaceName:NSDeviceRGBColorSpace];
42 return NS_RGB((unsigned int)([deviceColor redComponent] * 255.0),
43 (unsigned int)([deviceColor greenComponent] * 255.0),
44 (unsigned int)([deviceColor blueComponent] * 255.0));
45 }
47 nsresult
48 nsLookAndFeel::NativeGetColor(ColorID aID, nscolor &aColor)
49 {
50 NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
52 nsresult res = NS_OK;
54 switch (aID) {
55 case eColorID_WindowBackground:
56 aColor = NS_RGB(0xff,0xff,0xff);
57 break;
58 case eColorID_WindowForeground:
59 aColor = NS_RGB(0x00,0x00,0x00);
60 break;
61 case eColorID_WidgetBackground:
62 aColor = NS_RGB(0xdd,0xdd,0xdd);
63 break;
64 case eColorID_WidgetForeground:
65 aColor = NS_RGB(0x00,0x00,0x00);
66 break;
67 case eColorID_WidgetSelectBackground:
68 aColor = NS_RGB(0x80,0x80,0x80);
69 break;
70 case eColorID_WidgetSelectForeground:
71 aColor = NS_RGB(0x00,0x00,0x80);
72 break;
73 case eColorID_Widget3DHighlight:
74 aColor = NS_RGB(0xa0,0xa0,0xa0);
75 break;
76 case eColorID_Widget3DShadow:
77 aColor = NS_RGB(0x40,0x40,0x40);
78 break;
79 case eColorID_TextBackground:
80 aColor = NS_RGB(0xff,0xff,0xff);
81 break;
82 case eColorID_TextForeground:
83 aColor = NS_RGB(0x00,0x00,0x00);
84 break;
85 case eColorID_TextSelectBackground:
86 aColor = GetColorFromNSColor([NSColor selectedTextBackgroundColor]);
87 break;
88 case eColorID_highlight: // CSS2 color
89 aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
90 break;
91 case eColorID__moz_menuhover:
92 aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
93 break;
94 case eColorID_TextSelectForeground:
95 GetColor(eColorID_TextSelectBackground, aColor);
96 if (aColor == 0x000000)
97 aColor = NS_RGB(0xff,0xff,0xff);
98 else
99 aColor = NS_DONT_CHANGE_COLOR;
100 break;
101 case eColorID_highlighttext: // CSS2 color
102 case eColorID__moz_menuhovertext:
103 aColor = GetColorFromNSColor([NSColor alternateSelectedControlTextColor]);
104 break;
105 case eColorID_IMESelectedRawTextBackground:
106 case eColorID_IMESelectedConvertedTextBackground:
107 case eColorID_IMERawInputBackground:
108 case eColorID_IMEConvertedTextBackground:
109 aColor = NS_TRANSPARENT;
110 break;
111 case eColorID_IMESelectedRawTextForeground:
112 case eColorID_IMESelectedConvertedTextForeground:
113 case eColorID_IMERawInputForeground:
114 case eColorID_IMEConvertedTextForeground:
115 aColor = NS_SAME_AS_FOREGROUND_COLOR;
116 break;
117 case eColorID_IMERawInputUnderline:
118 case eColorID_IMEConvertedTextUnderline:
119 aColor = NS_40PERCENT_FOREGROUND_COLOR;
120 break;
121 case eColorID_IMESelectedRawTextUnderline:
122 case eColorID_IMESelectedConvertedTextUnderline:
123 aColor = NS_SAME_AS_FOREGROUND_COLOR;
124 break;
125 case eColorID_SpellCheckerUnderline:
126 aColor = NS_RGB(0xff, 0, 0);
127 break;
129 //
130 // css2 system colors http://www.w3.org/TR/REC-CSS2/ui.html#system-colors
131 //
132 // It's really hard to effectively map these to the Appearance Manager properly,
133 // since they are modeled word for word after the win32 system colors and don't have any
134 // real counterparts in the Mac world. I'm sure we'll be tweaking these for
135 // years to come.
136 //
137 // Thanks to mpt26@student.canterbury.ac.nz for the hardcoded values that form the defaults
138 // if querying the Appearance Manager fails ;)
139 //
141 case eColorID_buttontext:
142 case eColorID__moz_buttonhovertext:
143 aColor = GetColorFromNSColor([NSColor controlTextColor]);
144 break;
145 case eColorID_captiontext:
146 case eColorID_menutext:
147 case eColorID_infotext:
148 case eColorID__moz_menubartext:
149 aColor = GetColorFromNSColor([NSColor textColor]);
150 break;
151 case eColorID_windowtext:
152 aColor = GetColorFromNSColor([NSColor windowFrameTextColor]);
153 break;
154 case eColorID_activecaption:
155 aColor = GetColorFromNSColor([NSColor gridColor]);
156 break;
157 case eColorID_activeborder:
158 aColor = NS_RGB(0x00,0x00,0x00);
159 break;
160 case eColorID_appworkspace:
161 aColor = NS_RGB(0xFF,0xFF,0xFF);
162 break;
163 case eColorID_background:
164 aColor = NS_RGB(0x63,0x63,0xCE);
165 break;
166 case eColorID_buttonface:
167 case eColorID__moz_buttonhoverface:
168 aColor = NS_RGB(0xF0,0xF0,0xF0);
169 break;
170 case eColorID_buttonhighlight:
171 aColor = NS_RGB(0xFF,0xFF,0xFF);
172 break;
173 case eColorID_buttonshadow:
174 aColor = NS_RGB(0xDC,0xDC,0xDC);
175 break;
176 case eColorID_graytext:
177 aColor = GetColorFromNSColor([NSColor disabledControlTextColor]);
178 break;
179 case eColorID_inactiveborder:
180 aColor = GetColorFromNSColor([NSColor controlBackgroundColor]);
181 break;
182 case eColorID_inactivecaption:
183 aColor = GetColorFromNSColor([NSColor controlBackgroundColor]);
184 break;
185 case eColorID_inactivecaptiontext:
186 aColor = NS_RGB(0x45,0x45,0x45);
187 break;
188 case eColorID_scrollbar:
189 aColor = GetColorFromNSColor([NSColor scrollBarColor]);
190 break;
191 case eColorID_threeddarkshadow:
192 aColor = NS_RGB(0xDC,0xDC,0xDC);
193 break;
194 case eColorID_threedshadow:
195 aColor = NS_RGB(0xE0,0xE0,0xE0);
196 break;
197 case eColorID_threedface:
198 aColor = NS_RGB(0xF0,0xF0,0xF0);
199 break;
200 case eColorID_threedhighlight:
201 aColor = GetColorFromNSColor([NSColor highlightColor]);
202 break;
203 case eColorID_threedlightshadow:
204 aColor = NS_RGB(0xDA,0xDA,0xDA);
205 break;
206 case eColorID_menu:
207 aColor = GetColorFromNSColor([NSColor alternateSelectedControlTextColor]);
208 break;
209 case eColorID_infobackground:
210 aColor = NS_RGB(0xFF,0xFF,0xC7);
211 break;
212 case eColorID_windowframe:
213 aColor = GetColorFromNSColor([NSColor gridColor]);
214 break;
215 case eColorID_window:
216 case eColorID__moz_field:
217 case eColorID__moz_combobox:
218 aColor = NS_RGB(0xff,0xff,0xff);
219 break;
220 case eColorID__moz_fieldtext:
221 case eColorID__moz_comboboxtext:
222 aColor = GetColorFromNSColor([NSColor controlTextColor]);
223 break;
224 case eColorID__moz_dialog:
225 aColor = GetColorFromNSColor([NSColor controlHighlightColor]);
226 break;
227 case eColorID__moz_dialogtext:
228 case eColorID__moz_cellhighlighttext:
229 case eColorID__moz_html_cellhighlighttext:
230 aColor = GetColorFromNSColor([NSColor controlTextColor]);
231 break;
232 case eColorID__moz_dragtargetzone:
233 aColor = GetColorFromNSColor([NSColor selectedControlColor]);
234 break;
235 case eColorID__moz_mac_chrome_active:
236 case eColorID__moz_mac_chrome_inactive: {
237 int grey = NativeGreyColorAsInt(toolbarFillGrey, (aID == eColorID__moz_mac_chrome_active));
238 aColor = NS_RGB(grey, grey, grey);
239 }
240 break;
241 case eColorID__moz_mac_focusring:
242 aColor = GetColorFromNSColor([NSColor keyboardFocusIndicatorColor]);
243 break;
244 case eColorID__moz_mac_menushadow:
245 aColor = NS_RGB(0xA3,0xA3,0xA3);
246 break;
247 case eColorID__moz_mac_menutextdisable:
248 aColor = NS_RGB(0x88,0x88,0x88);
249 break;
250 case eColorID__moz_mac_menutextselect:
251 aColor = GetColorFromNSColor([NSColor selectedMenuItemTextColor]);
252 break;
253 case eColorID__moz_mac_disabledtoolbartext:
254 aColor = GetColorFromNSColor([NSColor disabledControlTextColor]);
255 break;
256 case eColorID__moz_mac_menuselect:
257 aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
258 break;
259 case eColorID__moz_buttondefault:
260 aColor = NS_RGB(0xDC,0xDC,0xDC);
261 break;
262 case eColorID__moz_cellhighlight:
263 case eColorID__moz_html_cellhighlight:
264 case eColorID__moz_mac_secondaryhighlight:
265 // For inactive list selection
266 aColor = GetColorFromNSColor([NSColor secondarySelectedControlColor]);
267 break;
268 case eColorID__moz_eventreerow:
269 // Background color of even list rows.
270 aColor = GetColorFromNSColor([[NSColor controlAlternatingRowBackgroundColors] objectAtIndex:0]);
271 break;
272 case eColorID__moz_oddtreerow:
273 // Background color of odd list rows.
274 aColor = GetColorFromNSColor([[NSColor controlAlternatingRowBackgroundColors] objectAtIndex:1]);
275 break;
276 case eColorID__moz_nativehyperlinktext:
277 // There appears to be no available system defined color. HARDCODING to the appropriate color.
278 aColor = NS_RGB(0x14,0x4F,0xAE);
279 break;
280 default:
281 NS_WARNING("Someone asked nsILookAndFeel for a color I don't know about");
282 aColor = NS_RGB(0xff,0xff,0xff);
283 res = NS_ERROR_FAILURE;
284 break;
285 }
287 return res;
289 NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
290 }
292 nsresult
293 nsLookAndFeel::GetIntImpl(IntID aID, int32_t &aResult)
294 {
295 NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
297 nsresult res = nsXPLookAndFeel::GetIntImpl(aID, aResult);
298 if (NS_SUCCEEDED(res))
299 return res;
300 res = NS_OK;
302 switch (aID) {
303 case eIntID_CaretBlinkTime:
304 aResult = 567;
305 break;
306 case eIntID_CaretWidth:
307 aResult = 1;
308 break;
309 case eIntID_ShowCaretDuringSelection:
310 aResult = 0;
311 break;
312 case eIntID_SelectTextfieldsOnKeyFocus:
313 // Select textfield content when focused by kbd
314 // used by EventStateManager::sTextfieldSelectModel
315 aResult = 1;
316 break;
317 case eIntID_SubmenuDelay:
318 aResult = 200;
319 break;
320 case eIntID_TooltipDelay:
321 aResult = 500;
322 break;
323 case eIntID_MenusCanOverlapOSBar:
324 // xul popups are not allowed to overlap the menubar.
325 aResult = 0;
326 break;
327 case eIntID_SkipNavigatingDisabledMenuItem:
328 aResult = 1;
329 break;
330 case eIntID_DragThresholdX:
331 case eIntID_DragThresholdY:
332 aResult = 4;
333 break;
334 case eIntID_ScrollArrowStyle:
335 if (nsCocoaFeatures::OnLionOrLater()) {
336 // OS X Lion's scrollbars have no arrows
337 aResult = eScrollArrow_None;
338 } else {
339 NSString *buttonPlacement = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleScrollBarVariant"];
340 if ([buttonPlacement isEqualToString:@"Single"]) {
341 aResult = eScrollArrowStyle_Single;
342 } else if ([buttonPlacement isEqualToString:@"DoubleMin"]) {
343 aResult = eScrollArrowStyle_BothAtTop;
344 } else if ([buttonPlacement isEqualToString:@"DoubleBoth"]) {
345 aResult = eScrollArrowStyle_BothAtEachEnd;
346 } else {
347 aResult = eScrollArrowStyle_BothAtBottom; // The default is BothAtBottom.
348 }
349 }
350 break;
351 case eIntID_ScrollSliderStyle:
352 aResult = eScrollThumbStyle_Proportional;
353 break;
354 case eIntID_UseOverlayScrollbars:
355 aResult = SystemWantsOverlayScrollbars() ? 1 : 0;
356 break;
357 case eIntID_AllowOverlayScrollbarsOverlap:
358 aResult = AllowOverlayScrollbarsOverlap() ? 1 : 0;
359 break;
360 case eIntID_ScrollbarDisplayOnMouseMove:
361 aResult = 0;
362 break;
363 case eIntID_ScrollbarFadeBeginDelay:
364 aResult = 450;
365 break;
366 case eIntID_ScrollbarFadeDuration:
367 aResult = 200;
368 break;
369 case eIntID_TreeOpenDelay:
370 aResult = 1000;
371 break;
372 case eIntID_TreeCloseDelay:
373 aResult = 1000;
374 break;
375 case eIntID_TreeLazyScrollDelay:
376 aResult = 150;
377 break;
378 case eIntID_TreeScrollDelay:
379 aResult = 100;
380 break;
381 case eIntID_TreeScrollLinesMax:
382 aResult = 3;
383 break;
384 case eIntID_DWMCompositor:
385 case eIntID_WindowsClassic:
386 case eIntID_WindowsDefaultTheme:
387 case eIntID_TouchEnabled:
388 case eIntID_WindowsThemeIdentifier:
389 case eIntID_OperatingSystemVersionIdentifier:
390 aResult = 0;
391 res = NS_ERROR_NOT_IMPLEMENTED;
392 break;
393 case eIntID_MacGraphiteTheme:
394 aResult = [NSColor currentControlTint] == NSGraphiteControlTint;
395 break;
396 case eIntID_MacLionTheme:
397 aResult = nsCocoaFeatures::OnLionOrLater();
398 break;
399 case eIntID_AlertNotificationOrigin:
400 aResult = NS_ALERT_TOP;
401 break;
402 case eIntID_TabFocusModel:
403 {
404 // we should probably cache this
405 CFPropertyListRef fullKeyboardAccessProperty;
406 fullKeyboardAccessProperty = ::CFPreferencesCopyValue(CFSTR("AppleKeyboardUIMode"),
407 kCFPreferencesAnyApplication,
408 kCFPreferencesCurrentUser,
409 kCFPreferencesAnyHost);
410 aResult = 1; // default to just textboxes
411 if (fullKeyboardAccessProperty) {
412 int32_t fullKeyboardAccessPrefVal;
413 if (::CFNumberGetValue((CFNumberRef) fullKeyboardAccessProperty, kCFNumberIntType, &fullKeyboardAccessPrefVal)) {
414 // the second bit means "Full keyboard access" is on
415 if (fullKeyboardAccessPrefVal & (1 << 1))
416 aResult = 7; // everything that can be focused
417 }
418 ::CFRelease(fullKeyboardAccessProperty);
419 }
420 }
421 break;
422 case eIntID_ScrollToClick:
423 {
424 aResult = [[NSUserDefaults standardUserDefaults] boolForKey:@"AppleScrollerPagingBehavior"];
425 }
426 break;
427 case eIntID_ChosenMenuItemsShouldBlink:
428 aResult = 1;
429 break;
430 case eIntID_IMERawInputUnderlineStyle:
431 case eIntID_IMEConvertedTextUnderlineStyle:
432 case eIntID_IMESelectedRawTextUnderlineStyle:
433 case eIntID_IMESelectedConvertedTextUnderline:
434 aResult = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
435 break;
436 case eIntID_SpellCheckerUnderlineStyle:
437 aResult = NS_STYLE_TEXT_DECORATION_STYLE_DOTTED;
438 break;
439 case eIntID_ScrollbarButtonAutoRepeatBehavior:
440 aResult = 0;
441 break;
442 case eIntID_SwipeAnimationEnabled:
443 aResult = 0;
444 if ([NSEvent respondsToSelector:@selector(
445 isSwipeTrackingFromScrollEventsEnabled)]) {
446 aResult = [NSEvent isSwipeTrackingFromScrollEventsEnabled] ? 1 : 0;
447 }
448 break;
449 case eIntID_ColorPickerAvailable:
450 aResult = 1;
451 break;
452 default:
453 aResult = 0;
454 res = NS_ERROR_FAILURE;
455 }
456 return res;
458 NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
459 }
461 nsresult
462 nsLookAndFeel::GetFloatImpl(FloatID aID, float &aResult)
463 {
464 nsresult res = nsXPLookAndFeel::GetFloatImpl(aID, aResult);
465 if (NS_SUCCEEDED(res))
466 return res;
467 res = NS_OK;
469 switch (aID) {
470 case eFloatID_IMEUnderlineRelativeSize:
471 aResult = 2.0f;
472 break;
473 case eFloatID_SpellCheckerUnderlineRelativeSize:
474 aResult = 2.0f;
475 break;
476 default:
477 aResult = -1.0;
478 res = NS_ERROR_FAILURE;
479 }
481 return res;
482 }
484 bool nsLookAndFeel::UseOverlayScrollbars()
485 {
486 return GetInt(eIntID_UseOverlayScrollbars) != 0;
487 }
489 bool nsLookAndFeel::SystemWantsOverlayScrollbars()
490 {
491 return ([NSScroller respondsToSelector:@selector(preferredScrollerStyle)] &&
492 [NSScroller preferredScrollerStyle] == mozNSScrollerStyleOverlay);
493 }
495 bool nsLookAndFeel::AllowOverlayScrollbarsOverlap()
496 {
497 return (UseOverlayScrollbars() && nsCocoaFeatures::OnMountainLionOrLater());
498 }
500 // copied from gfxQuartzFontCache.mm, maybe should go in a Cocoa utils
501 // file somewhere
502 static void GetStringForNSString(const NSString *aSrc, nsAString& aDest)
503 {
504 aDest.SetLength([aSrc length]);
505 [aSrc getCharacters:reinterpret_cast<unichar*>(aDest.BeginWriting())];
506 }
508 bool
509 nsLookAndFeel::GetFontImpl(FontID aID, nsString &aFontName,
510 gfxFontStyle &aFontStyle,
511 float aDevPixPerCSSPixel)
512 {
513 NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
515 // hack for now
516 if (aID == eFont_Window || aID == eFont_Document) {
517 aFontStyle.style = NS_FONT_STYLE_NORMAL;
518 aFontStyle.weight = NS_FONT_WEIGHT_NORMAL;
519 aFontStyle.stretch = NS_FONT_STRETCH_NORMAL;
520 aFontStyle.size = 14 * aDevPixPerCSSPixel;
521 aFontStyle.systemFont = true;
523 aFontName.AssignLiteral("sans-serif");
524 return true;
525 }
527 /* possibilities, see NSFont Class Reference:
528 [NSFont boldSystemFontOfSize: 0.0]
529 [NSFont controlContentFontOfSize: 0.0]
530 [NSFont labelFontOfSize: 0.0]
531 [NSFont menuBarFontOfSize: 0.0]
532 [NSFont menuFontOfSize: 0.0]
533 [NSFont messageFontOfSize: 0.0]
534 [NSFont paletteFontOfSize: 0.0]
535 [NSFont systemFontOfSize: 0.0]
536 [NSFont titleBarFontOfSize: 0.0]
537 [NSFont toolTipsFontOfSize: 0.0]
538 [NSFont userFixedPitchFontOfSize: 0.0]
539 [NSFont userFontOfSize: 0.0]
540 [NSFont systemFontOfSize: [NSFont smallSystemFontSize]]
541 [NSFont boldSystemFontOfSize: [NSFont smallSystemFontSize]]
542 */
544 NSFont *font = nullptr;
545 switch (aID) {
546 // css2
547 case eFont_Caption:
548 font = [NSFont systemFontOfSize:0.0];
549 break;
550 case eFont_Icon: // used in urlbar; tried labelFont, but too small
551 font = [NSFont controlContentFontOfSize:0.0];
552 break;
553 case eFont_Menu:
554 font = [NSFont systemFontOfSize:0.0];
555 break;
556 case eFont_MessageBox:
557 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
558 break;
559 case eFont_SmallCaption:
560 font = [NSFont boldSystemFontOfSize:[NSFont smallSystemFontSize]];
561 break;
562 case eFont_StatusBar:
563 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
564 break;
565 // css3
566 //case eFont_Window: = 'sans-serif'
567 //case eFont_Document: = 'sans-serif'
568 case eFont_Workspace:
569 font = [NSFont controlContentFontOfSize:0.0];
570 break;
571 case eFont_Desktop:
572 font = [NSFont controlContentFontOfSize:0.0];
573 break;
574 case eFont_Info:
575 font = [NSFont controlContentFontOfSize:0.0];
576 break;
577 case eFont_Dialog:
578 font = [NSFont systemFontOfSize:0.0];
579 break;
580 case eFont_Button:
581 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
582 break;
583 case eFont_PullDownMenu:
584 font = [NSFont menuBarFontOfSize:0.0];
585 break;
586 case eFont_List:
587 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
588 break;
589 case eFont_Field:
590 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
591 break;
592 // moz
593 case eFont_Tooltips:
594 font = [NSFont toolTipsFontOfSize:0.0];
595 break;
596 case eFont_Widget:
597 font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
598 break;
599 default:
600 break;
601 }
603 if (!font) {
604 NS_WARNING("failed to find a system font!");
605 return false;
606 }
608 NSFontSymbolicTraits traits = [[font fontDescriptor] symbolicTraits];
609 aFontStyle.style =
610 (traits & NSFontItalicTrait) ? NS_FONT_STYLE_ITALIC : NS_FONT_STYLE_NORMAL;
611 aFontStyle.weight =
612 (traits & NSFontBoldTrait) ? NS_FONT_WEIGHT_BOLD : NS_FONT_WEIGHT_NORMAL;
613 aFontStyle.stretch =
614 (traits & NSFontExpandedTrait) ?
615 NS_FONT_STRETCH_EXPANDED : (traits & NSFontCondensedTrait) ?
616 NS_FONT_STRETCH_CONDENSED : NS_FONT_STRETCH_NORMAL;
617 // convert size from css pixels to device pixels
618 aFontStyle.size = [font pointSize] * aDevPixPerCSSPixel;
619 aFontStyle.systemFont = true;
621 GetStringForNSString([font familyName], aFontName);
622 return true;
624 NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(false);
625 }
