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Issue 6246027: Move src/gfx/ to src/ui/gfx... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 10 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "gfx/native_theme_linux.h"
6
7 #include <limits>
8
9 #include "base/logging.h"
10 #include "gfx/codec/png_codec.h"
11 #include "gfx/color_utils.h"
12 #include "gfx/gfx_module.h"
13 #include "gfx/size.h"
14 #include "gfx/rect.h"
15 #include "grit/gfx_resources.h"
16 #include "third_party/skia/include/effects/SkGradientShader.h"
17
18 namespace gfx {
19
20 unsigned int NativeThemeLinux::button_length_ = 14;
21 unsigned int NativeThemeLinux::scrollbar_width_ = 15;
22 unsigned int NativeThemeLinux::thumb_inactive_color_ = 0xeaeaea;
23 unsigned int NativeThemeLinux::thumb_active_color_ = 0xf4f4f4;
24 unsigned int NativeThemeLinux::track_color_ = 0xd3d3d3;
25
26 // These are the default dimensions of radio buttons and checkboxes.
27 static const int kCheckboxAndRadioWidth = 13;
28 static const int kCheckboxAndRadioHeight = 13;
29
30 // These sizes match the sizes in Chromium Win.
31 static const int kSliderThumbWidth = 11;
32 static const int kSliderThumbHeight = 21;
33
34 static const SkColor kSliderTrackBackgroundColor =
35 SkColorSetRGB(0xe3, 0xdd, 0xd8);
36 static const SkColor kSliderThumbLightGrey = SkColorSetRGB(0xf4, 0xf2, 0xef);
37 static const SkColor kSliderThumbDarkGrey = SkColorSetRGB(0xea, 0xe5, 0xe0);
38 static const SkColor kSliderThumbBorderDarkGrey =
39 SkColorSetRGB(0x9d, 0x96, 0x8e);
40
41 #if !defined(OS_CHROMEOS)
42 // Chromeos has a different look.
43 // static
44 NativeThemeLinux* NativeThemeLinux::instance() {
45 // The global NativeThemeLinux instance.
46 static NativeThemeLinux s_native_theme;
47 return &s_native_theme;
48 }
49 #endif
50
51 // Get lightness adjusted color.
52 static SkColor BrightenColor(const color_utils::HSL& hsl, SkAlpha alpha,
53 double lightness_amount) {
54 color_utils::HSL adjusted = hsl;
55 adjusted.l += lightness_amount;
56 if (adjusted.l > 1.0)
57 adjusted.l = 1.0;
58 if (adjusted.l < 0.0)
59 adjusted.l = 0.0;
60
61 return color_utils::HSLToSkColor(adjusted, alpha);
62 }
63
64 static SkBitmap* GfxGetBitmapNamed(int key) {
65 base::StringPiece data = GfxModule::GetResource(key);
66 if (!data.size()) {
67 NOTREACHED() << "Unable to load image resource " << key;
68 return NULL;
69 }
70
71 SkBitmap bitmap;
72 if (!gfx::PNGCodec::Decode(
73 reinterpret_cast<const unsigned char*>(data.data()),
74 data.size(), &bitmap)) {
75 NOTREACHED() << "Unable to decode image resource " << key;
76 return NULL;
77 }
78
79 return new SkBitmap(bitmap);
80 }
81
82 NativeThemeLinux::NativeThemeLinux() {
83 }
84
85 NativeThemeLinux::~NativeThemeLinux() {
86 }
87
88 gfx::Size NativeThemeLinux::GetPartSize(Part part) const {
89 switch (part) {
90 case kScrollbarDownArrow:
91 case kScrollbarUpArrow:
92 return gfx::Size(scrollbar_width_, button_length_);
93 case kScrollbarLeftArrow:
94 case kScrollbarRightArrow:
95 return gfx::Size(button_length_, scrollbar_width_);
96 case kScrollbarHorizontalThumb:
97 // This matches Firefox on Linux.
98 return gfx::Size(2 * scrollbar_width_, scrollbar_width_);
99 case kScrollbarVerticalThumb:
100 // This matches Firefox on Linux.
101 return gfx::Size(scrollbar_width_, 2 * scrollbar_width_);
102 break;
103 case kScrollbarHorizontalTrack:
104 return gfx::Size(0, scrollbar_width_);
105 case kScrollbarVerticalTrack:
106 return gfx::Size(scrollbar_width_, 0);
107 case kCheckbox:
108 case kRadio:
109 return gfx::Size(kCheckboxAndRadioWidth, kCheckboxAndRadioHeight);
110 case kSliderThumb:
111 // These sizes match the sizes in Chromium Win.
112 return gfx::Size(kSliderThumbWidth, kSliderThumbHeight);
113 case kInnerSpinButton:
114 return gfx::Size(scrollbar_width_, 0);
115 case kPushButton:
116 case kTextField:
117 case kMenuList:
118 case kSliderTrack:
119 case kProgressBar:
120 return gfx::Size(); // No default size.
121 }
122 return gfx::Size();
123 }
124
125 void NativeThemeLinux::PaintArrowButton(
126 skia::PlatformCanvas* canvas,
127 const gfx::Rect& rect, Part direction, State state) {
128 int widthMiddle, lengthMiddle;
129 SkPaint paint;
130 if (direction == kScrollbarUpArrow || direction == kScrollbarDownArrow) {
131 widthMiddle = rect.width() / 2 + 1;
132 lengthMiddle = rect.height() / 2 + 1;
133 } else {
134 lengthMiddle = rect.width() / 2 + 1;
135 widthMiddle = rect.height() / 2 + 1;
136 }
137
138 // Calculate button color.
139 SkScalar trackHSV[3];
140 SkColorToHSV(track_color_, trackHSV);
141 SkColor buttonColor = SaturateAndBrighten(trackHSV, 0, 0.2);
142 SkColor backgroundColor = buttonColor;
143 if (state == kPressed) {
144 SkScalar buttonHSV[3];
145 SkColorToHSV(buttonColor, buttonHSV);
146 buttonColor = SaturateAndBrighten(buttonHSV, 0, -0.1);
147 } else if (state == kHovered) {
148 SkScalar buttonHSV[3];
149 SkColorToHSV(buttonColor, buttonHSV);
150 buttonColor = SaturateAndBrighten(buttonHSV, 0, 0.05);
151 }
152
153 SkIRect skrect;
154 skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), rect.y()
155 + rect.height());
156 // Paint the background (the area visible behind the rounded corners).
157 paint.setColor(backgroundColor);
158 canvas->drawIRect(skrect, paint);
159
160 // Paint the button's outline and fill the middle
161 SkPath outline;
162 switch (direction) {
163 case kScrollbarUpArrow:
164 outline.moveTo(rect.x() + 0.5, rect.y() + rect.height() + 0.5);
165 outline.rLineTo(0, -(rect.height() - 2));
166 outline.rLineTo(2, -2);
167 outline.rLineTo(rect.width() - 5, 0);
168 outline.rLineTo(2, 2);
169 outline.rLineTo(0, rect.height() - 2);
170 break;
171 case kScrollbarDownArrow:
172 outline.moveTo(rect.x() + 0.5, rect.y() - 0.5);
173 outline.rLineTo(0, rect.height() - 2);
174 outline.rLineTo(2, 2);
175 outline.rLineTo(rect.width() - 5, 0);
176 outline.rLineTo(2, -2);
177 outline.rLineTo(0, -(rect.height() - 2));
178 break;
179 case kScrollbarRightArrow:
180 outline.moveTo(rect.x() - 0.5, rect.y() + 0.5);
181 outline.rLineTo(rect.width() - 2, 0);
182 outline.rLineTo(2, 2);
183 outline.rLineTo(0, rect.height() - 5);
184 outline.rLineTo(-2, 2);
185 outline.rLineTo(-(rect.width() - 2), 0);
186 break;
187 case kScrollbarLeftArrow:
188 outline.moveTo(rect.x() + rect.width() + 0.5, rect.y() + 0.5);
189 outline.rLineTo(-(rect.width() - 2), 0);
190 outline.rLineTo(-2, 2);
191 outline.rLineTo(0, rect.height() - 5);
192 outline.rLineTo(2, 2);
193 outline.rLineTo(rect.width() - 2, 0);
194 break;
195 default:
196 break;
197 }
198 outline.close();
199
200 paint.setStyle(SkPaint::kFill_Style);
201 paint.setColor(buttonColor);
202 canvas->drawPath(outline, paint);
203
204 paint.setAntiAlias(true);
205 paint.setStyle(SkPaint::kStroke_Style);
206 SkScalar thumbHSV[3];
207 SkColorToHSV(thumb_inactive_color_, thumbHSV);
208 paint.setColor(OutlineColor(trackHSV, thumbHSV));
209 canvas->drawPath(outline, paint);
210
211 // If the button is disabled or read-only, the arrow is drawn with the
212 // outline color.
213 if (state != kDisabled)
214 paint.setColor(SK_ColorBLACK);
215
216 paint.setAntiAlias(false);
217 paint.setStyle(SkPaint::kFill_Style);
218
219 SkPath path;
220 // The constants in this block of code are hand-tailored to produce good
221 // looking arrows without anti-aliasing.
222 switch (direction) {
223 case kScrollbarUpArrow:
224 path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle + 2);
225 path.rLineTo(7, 0);
226 path.rLineTo(-4, -4);
227 break;
228 case kScrollbarDownArrow:
229 path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle - 3);
230 path.rLineTo(7, 0);
231 path.rLineTo(-4, 4);
232 break;
233 case kScrollbarRightArrow:
234 path.moveTo(rect.x() + lengthMiddle - 3, rect.y() + widthMiddle - 4);
235 path.rLineTo(0, 7);
236 path.rLineTo(4, -4);
237 break;
238 case kScrollbarLeftArrow:
239 path.moveTo(rect.x() + lengthMiddle + 1, rect.y() + widthMiddle - 5);
240 path.rLineTo(0, 9);
241 path.rLineTo(-4, -4);
242 break;
243 default:
244 break;
245 }
246 path.close();
247
248 canvas->drawPath(path, paint);
249 }
250
251 void NativeThemeLinux::Paint(skia::PlatformCanvas* canvas,
252 Part part,
253 State state,
254 const gfx::Rect& rect,
255 const ExtraParams& extra) {
256 switch (part) {
257 case kScrollbarDownArrow:
258 case kScrollbarUpArrow:
259 case kScrollbarLeftArrow:
260 case kScrollbarRightArrow:
261 PaintArrowButton(canvas, rect, part, state);
262 break;
263 case kScrollbarHorizontalThumb:
264 case kScrollbarVerticalThumb:
265 PaintScrollbarThumb(canvas, part, state, rect);
266 break;
267 case kScrollbarHorizontalTrack:
268 case kScrollbarVerticalTrack:
269 PaintScrollbarTrack(canvas, part, state, extra.scrollbar_track, rect);
270 break;
271 case kCheckbox:
272 PaintCheckbox(canvas, state, rect, extra.button);
273 break;
274 case kRadio:
275 PaintRadio(canvas, state, rect, extra.button);
276 break;
277 case kPushButton:
278 PaintButton(canvas, state, rect, extra.button);
279 break;
280 case kTextField:
281 PaintTextField(canvas, state, rect, extra.text_field);
282 break;
283 case kMenuList:
284 PaintMenuList(canvas, state, rect, extra.menu_list);
285 break;
286 case kSliderTrack:
287 PaintSliderTrack(canvas, state, rect, extra.slider);
288 break;
289 case kSliderThumb:
290 PaintSliderThumb(canvas, state, rect, extra.slider);
291 break;
292 case kInnerSpinButton:
293 PaintInnerSpinButton(canvas, state, rect, extra.inner_spin);
294 break;
295 case kProgressBar:
296 PaintProgressBar(canvas, state, rect, extra.progress_bar);
297 break;
298 }
299 }
300
301 void NativeThemeLinux::PaintScrollbarTrack(skia::PlatformCanvas* canvas,
302 Part part,
303 State state,
304 const ScrollbarTrackExtraParams& extra_params,
305 const gfx::Rect& rect) {
306 SkPaint paint;
307 SkIRect skrect;
308
309 skrect.set(rect.x(), rect.y(), rect.right(), rect.bottom());
310 SkScalar track_hsv[3];
311 SkColorToHSV(track_color_, track_hsv);
312 paint.setColor(SaturateAndBrighten(track_hsv, 0, 0));
313 canvas->drawIRect(skrect, paint);
314
315 SkScalar thumb_hsv[3];
316 SkColorToHSV(thumb_inactive_color_, thumb_hsv);
317
318 paint.setColor(OutlineColor(track_hsv, thumb_hsv));
319 DrawBox(canvas, rect, paint);
320 }
321
322 void NativeThemeLinux::PaintScrollbarThumb(skia::PlatformCanvas* canvas,
323 Part part,
324 State state,
325 const gfx::Rect& rect) {
326 const bool hovered = state == kHovered;
327 const int midx = rect.x() + rect.width() / 2;
328 const int midy = rect.y() + rect.height() / 2;
329 const bool vertical = part == kScrollbarVerticalThumb;
330
331 SkScalar thumb[3];
332 SkColorToHSV(hovered ? thumb_active_color_ : thumb_inactive_color_, thumb);
333
334 SkPaint paint;
335 paint.setColor(SaturateAndBrighten(thumb, 0, 0.02));
336
337 SkIRect skrect;
338 if (vertical)
339 skrect.set(rect.x(), rect.y(), midx + 1, rect.y() + rect.height());
340 else
341 skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), midy + 1);
342
343 canvas->drawIRect(skrect, paint);
344
345 paint.setColor(SaturateAndBrighten(thumb, 0, -0.02));
346
347 if (vertical) {
348 skrect.set(
349 midx + 1, rect.y(), rect.x() + rect.width(), rect.y() + rect.height());
350 } else {
351 skrect.set(
352 rect.x(), midy + 1, rect.x() + rect.width(), rect.y() + rect.height());
353 }
354
355 canvas->drawIRect(skrect, paint);
356
357 SkScalar track[3];
358 SkColorToHSV(track_color_, track);
359 paint.setColor(OutlineColor(track, thumb));
360 DrawBox(canvas, rect, paint);
361
362 if (rect.height() > 10 && rect.width() > 10) {
363 const int grippy_half_width = 2;
364 const int inter_grippy_offset = 3;
365 if (vertical) {
366 DrawHorizLine(canvas,
367 midx - grippy_half_width,
368 midx + grippy_half_width,
369 midy - inter_grippy_offset,
370 paint);
371 DrawHorizLine(canvas,
372 midx - grippy_half_width,
373 midx + grippy_half_width,
374 midy,
375 paint);
376 DrawHorizLine(canvas,
377 midx - grippy_half_width,
378 midx + grippy_half_width,
379 midy + inter_grippy_offset,
380 paint);
381 } else {
382 DrawVertLine(canvas,
383 midx - inter_grippy_offset,
384 midy - grippy_half_width,
385 midy + grippy_half_width,
386 paint);
387 DrawVertLine(canvas,
388 midx,
389 midy - grippy_half_width,
390 midy + grippy_half_width,
391 paint);
392 DrawVertLine(canvas,
393 midx + inter_grippy_offset,
394 midy - grippy_half_width,
395 midy + grippy_half_width,
396 paint);
397 }
398 }
399 }
400
401 void NativeThemeLinux::PaintCheckbox(skia::PlatformCanvas* canvas,
402 State state,
403 const gfx::Rect& rect,
404 const ButtonExtraParams& button) {
405 static SkBitmap* image_disabled_indeterminate = GfxGetBitmapNamed(
406 IDR_LINUX_CHECKBOX_DISABLED_INDETERMINATE);
407 static SkBitmap* image_indeterminate = GfxGetBitmapNamed(
408 IDR_LINUX_CHECKBOX_INDETERMINATE);
409 static SkBitmap* image_disabled_on = GfxGetBitmapNamed(
410 IDR_LINUX_CHECKBOX_DISABLED_ON);
411 static SkBitmap* image_on = GfxGetBitmapNamed(IDR_LINUX_CHECKBOX_ON);
412 static SkBitmap* image_disabled_off = GfxGetBitmapNamed(
413 IDR_LINUX_CHECKBOX_DISABLED_OFF);
414 static SkBitmap* image_off = GfxGetBitmapNamed(IDR_LINUX_CHECKBOX_OFF);
415
416 SkBitmap* image = NULL;
417 if (button.indeterminate) {
418 image = state == kDisabled ? image_disabled_indeterminate
419 : image_indeterminate;
420 } else if (button.checked) {
421 image = state == kDisabled ? image_disabled_on : image_on;
422 } else {
423 image = state == kDisabled ? image_disabled_off : image_off;
424 }
425
426 gfx::Rect bounds = rect.Center(gfx::Size(image->width(), image->height()));
427 DrawBitmapInt(canvas, *image, 0, 0, image->width(), image->height(),
428 bounds.x(), bounds.y(), bounds.width(), bounds.height());
429 }
430
431 void NativeThemeLinux::PaintRadio(skia::PlatformCanvas* canvas,
432 State state,
433 const gfx::Rect& rect,
434 const ButtonExtraParams& button) {
435 static SkBitmap* image_disabled_on = GfxGetBitmapNamed(
436 IDR_LINUX_RADIO_DISABLED_ON);
437 static SkBitmap* image_on = GfxGetBitmapNamed(IDR_LINUX_RADIO_ON);
438 static SkBitmap* image_disabled_off = GfxGetBitmapNamed(
439 IDR_LINUX_RADIO_DISABLED_OFF);
440 static SkBitmap* image_off = GfxGetBitmapNamed(IDR_LINUX_RADIO_OFF);
441
442 SkBitmap* image = NULL;
443 if (state == kDisabled)
444 image = button.checked ? image_disabled_on : image_disabled_off;
445 else
446 image = button.checked ? image_on : image_off;
447
448 gfx::Rect bounds = rect.Center(gfx::Size(image->width(), image->height()));
449 DrawBitmapInt(canvas, *image, 0, 0, image->width(), image->height(),
450 bounds.x(), bounds.y(), bounds.width(), bounds.height());
451 }
452
453 void NativeThemeLinux::PaintButton(skia::PlatformCanvas* canvas,
454 State state,
455 const gfx::Rect& rect,
456 const ButtonExtraParams& button) {
457 SkPaint paint;
458 SkRect skrect;
459 const int kRight = rect.right();
460 const int kBottom = rect.bottom();
461 SkColor base_color = button.background_color;
462
463 color_utils::HSL base_hsl;
464 color_utils::SkColorToHSL(base_color, &base_hsl);
465
466 // Our standard gradient is from 0xdd to 0xf8. This is the amount of
467 // increased luminance between those values.
468 SkColor light_color(BrightenColor(base_hsl, SkColorGetA(base_color), 0.105));
469
470 // If the button is too small, fallback to drawing a single, solid color
471 if (rect.width() < 5 || rect.height() < 5) {
472 paint.setColor(base_color);
473 skrect.set(rect.x(), rect.y(), kRight, kBottom);
474 canvas->drawRect(skrect, paint);
475 return;
476 }
477
478 const int kBorderAlpha = state == kHovered ? 0x80 : 0x55;
479 paint.setARGB(kBorderAlpha, 0, 0, 0);
480 canvas->drawLine(rect.x() + 1, rect.y(), kRight - 1, rect.y(), paint);
481 canvas->drawLine(kRight - 1, rect.y() + 1, kRight - 1, kBottom - 1, paint);
482 canvas->drawLine(rect.x() + 1, kBottom - 1, kRight - 1, kBottom - 1, paint);
483 canvas->drawLine(rect.x(), rect.y() + 1, rect.x(), kBottom - 1, paint);
484
485 paint.setColor(SK_ColorBLACK);
486 const int kLightEnd = state == kPressed ? 1 : 0;
487 const int kDarkEnd = !kLightEnd;
488 SkPoint gradient_bounds[2];
489 gradient_bounds[kLightEnd].set(SkIntToScalar(rect.x()),
490 SkIntToScalar(rect.y()));
491 gradient_bounds[kDarkEnd].set(SkIntToScalar(rect.x()),
492 SkIntToScalar(kBottom - 1));
493 SkColor colors[2];
494 colors[0] = light_color;
495 colors[1] = base_color;
496
497 SkShader* shader = SkGradientShader::CreateLinear(
498 gradient_bounds, colors, NULL, 2, SkShader::kClamp_TileMode, NULL);
499 paint.setStyle(SkPaint::kFill_Style);
500 paint.setShader(shader);
501 shader->unref();
502
503 skrect.set(rect.x() + 1, rect.y() + 1, kRight - 1, kBottom - 1);
504 canvas->drawRect(skrect, paint);
505
506 paint.setShader(NULL);
507 paint.setColor(BrightenColor(base_hsl, SkColorGetA(base_color), -0.0588));
508 canvas->drawPoint(rect.x() + 1, rect.y() + 1, paint);
509 canvas->drawPoint(kRight - 2, rect.y() + 1, paint);
510 canvas->drawPoint(rect.x() + 1, kBottom - 2, paint);
511 canvas->drawPoint(kRight - 2, kBottom - 2, paint);
512 }
513
514 void NativeThemeLinux::PaintTextField(skia::PlatformCanvas* canvas,
515 State state,
516 const gfx::Rect& rect,
517 const TextFieldExtraParams& text) {
518 // The following drawing code simulates the user-agent css border for
519 // text area and text input so that we do not break layout tests. Once we
520 // have decided the desired looks, we should update the code here and
521 // the layout test expectations.
522 SkRect bounds;
523 bounds.set(rect.x(), rect.y(), rect.right() - 1, rect.bottom() - 1);
524
525 SkPaint fill_paint;
526 fill_paint.setStyle(SkPaint::kFill_Style);
527 fill_paint.setColor(text.background_color);
528 canvas->drawRect(bounds, fill_paint);
529
530 if (text.is_text_area) {
531 // Draw text area border: 1px solid black
532 SkPaint stroke_paint;
533 fill_paint.setStyle(SkPaint::kStroke_Style);
534 fill_paint.setColor(SK_ColorBLACK);
535 canvas->drawRect(bounds, fill_paint);
536 } else {
537 // Draw text input and listbox inset border
538 // Text Input: 2px inset #eee
539 // Listbox: 1px inset #808080
540 const SkColor kLightColor = text.is_listbox ?
541 SkColorSetRGB(0x80, 0x80, 0x80) : SkColorSetRGB(0xee, 0xee, 0xee);
542 const SkColor kDarkColor = text.is_listbox ?
543 SkColorSetRGB(0x2c, 0x2c, 0x2c) : SkColorSetRGB(0x9a, 0x9a, 0x9a);
544 const int kBorderWidth = text.is_listbox ? 1 : 2;
545
546 SkPaint dark_paint;
547 dark_paint.setAntiAlias(true);
548 dark_paint.setStyle(SkPaint::kFill_Style);
549 dark_paint.setColor(kDarkColor);
550
551 SkPaint light_paint;
552 light_paint.setAntiAlias(true);
553 light_paint.setStyle(SkPaint::kFill_Style);
554 light_paint.setColor(kLightColor);
555
556 int left = rect.x();
557 int top = rect.y();
558 int right = rect.right();
559 int bottom = rect.bottom();
560
561 SkPath path;
562 path.incReserve(4);
563
564 // Top
565 path.moveTo(SkIntToScalar(left), SkIntToScalar(top));
566 path.lineTo(SkIntToScalar(left + kBorderWidth),
567 SkIntToScalar(top + kBorderWidth));
568 path.lineTo(SkIntToScalar(right - kBorderWidth),
569 SkIntToScalar(top + kBorderWidth));
570 path.lineTo(SkIntToScalar(right), SkIntToScalar(top));
571 canvas->drawPath(path, dark_paint);
572
573 // Bottom
574 path.reset();
575 path.moveTo(SkIntToScalar(left + kBorderWidth),
576 SkIntToScalar(bottom - kBorderWidth));
577 path.lineTo(SkIntToScalar(left), SkIntToScalar(bottom));
578 path.lineTo(SkIntToScalar(right), SkIntToScalar(bottom));
579 path.lineTo(SkIntToScalar(right - kBorderWidth),
580 SkIntToScalar(bottom - kBorderWidth));
581 canvas->drawPath(path, light_paint);
582
583 // Left
584 path.reset();
585 path.moveTo(SkIntToScalar(left), SkIntToScalar(top));
586 path.lineTo(SkIntToScalar(left), SkIntToScalar(bottom));
587 path.lineTo(SkIntToScalar(left + kBorderWidth),
588 SkIntToScalar(bottom - kBorderWidth));
589 path.lineTo(SkIntToScalar(left + kBorderWidth),
590 SkIntToScalar(top + kBorderWidth));
591 canvas->drawPath(path, dark_paint);
592
593 // Right
594 path.reset();
595 path.moveTo(SkIntToScalar(right - kBorderWidth),
596 SkIntToScalar(top + kBorderWidth));
597 path.lineTo(SkIntToScalar(right - kBorderWidth), SkIntToScalar(bottom));
598 path.lineTo(SkIntToScalar(right), SkIntToScalar(bottom));
599 path.lineTo(SkIntToScalar(right), SkIntToScalar(top));
600 canvas->drawPath(path, light_paint);
601 }
602 }
603
604 void NativeThemeLinux::PaintMenuList(skia::PlatformCanvas* canvas,
605 State state,
606 const gfx::Rect& rect,
607 const MenuListExtraParams& menu_list) {
608 ButtonExtraParams button = { 0 };
609 button.background_color = menu_list.background_color;
610 PaintButton(canvas, state, rect, button);
611
612 SkPaint paint;
613 paint.setColor(SK_ColorBLACK);
614 paint.setAntiAlias(true);
615 paint.setStyle(SkPaint::kFill_Style);
616
617 SkPath path;
618 path.moveTo(menu_list.arrow_x, menu_list.arrow_y - 3);
619 path.rLineTo(6, 0);
620 path.rLineTo(-3, 6);
621 path.close();
622 canvas->drawPath(path, paint);
623 }
624
625 void NativeThemeLinux::PaintSliderTrack(skia::PlatformCanvas* canvas,
626 State state,
627 const gfx::Rect& rect,
628 const SliderExtraParams& slider) {
629 const int kMidX = rect.x() + rect.width() / 2;
630 const int kMidY = rect.y() + rect.height() / 2;
631
632 SkPaint paint;
633 paint.setColor(kSliderTrackBackgroundColor);
634
635 SkRect skrect;
636 if (slider.vertical) {
637 skrect.set(std::max(rect.x(), kMidX - 2),
638 rect.y(),
639 std::min(rect.right(), kMidX + 2),
640 rect.bottom());
641 } else {
642 skrect.set(rect.x(),
643 std::max(rect.y(), kMidY - 2),
644 rect.right(),
645 std::min(rect.bottom(), kMidY + 2));
646 }
647 canvas->drawRect(skrect, paint);
648 }
649
650 void NativeThemeLinux::PaintSliderThumb(skia::PlatformCanvas* canvas,
651 State state,
652 const gfx::Rect& rect,
653 const SliderExtraParams& slider) {
654 const bool hovered = (state == kHovered) || slider.in_drag;
655 const int kMidX = rect.x() + rect.width() / 2;
656 const int kMidY = rect.y() + rect.height() / 2;
657
658 SkPaint paint;
659 paint.setColor(hovered ? SK_ColorWHITE : kSliderThumbLightGrey);
660
661 SkIRect skrect;
662 if (slider.vertical)
663 skrect.set(rect.x(), rect.y(), kMidX + 1, rect.bottom());
664 else
665 skrect.set(rect.x(), rect.y(), rect.right(), kMidY + 1);
666
667 canvas->drawIRect(skrect, paint);
668
669 paint.setColor(hovered ? kSliderThumbLightGrey : kSliderThumbDarkGrey);
670
671 if (slider.vertical)
672 skrect.set(kMidX + 1, rect.y(), rect.right(), rect.bottom());
673 else
674 skrect.set(rect.x(), kMidY + 1, rect.right(), rect.bottom());
675
676 canvas->drawIRect(skrect, paint);
677
678 paint.setColor(kSliderThumbBorderDarkGrey);
679 DrawBox(canvas, rect, paint);
680
681 if (rect.height() > 10 && rect.width() > 10) {
682 DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY, paint);
683 DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY - 3, paint);
684 DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY + 3, paint);
685 }
686 }
687
688 void NativeThemeLinux::PaintInnerSpinButton(skia::PlatformCanvas* canvas,
689 State state,
690 const gfx::Rect& rect,
691 const InnerSpinButtonExtraParams& spin_button) {
692 if (spin_button.read_only)
693 state = kDisabled;
694
695 State north_state = state;
696 State south_state = state;
697 if (spin_button.spin_up)
698 south_state = south_state != kDisabled ? kNormal : kDisabled;
699 else
700 north_state = north_state != kDisabled ? kNormal : kDisabled;
701
702 gfx::Rect half = rect;
703 half.set_height(rect.height() / 2);
704 PaintArrowButton(canvas, half, kScrollbarUpArrow, north_state);
705
706 half.set_y(rect.y() + rect.height() / 2);
707 PaintArrowButton(canvas, half, kScrollbarDownArrow, south_state);
708 }
709
710 void NativeThemeLinux::PaintProgressBar(skia::PlatformCanvas* canvas,
711 State state,
712 const gfx::Rect& rect,
713 const ProgressBarExtraParams& progress_bar) {
714 static SkBitmap* bar_image = GfxGetBitmapNamed(IDR_PROGRESS_BAR);
715 static SkBitmap* value_image = GfxGetBitmapNamed(IDR_PROGRESS_VALUE);
716 static SkBitmap* left_border_image = GfxGetBitmapNamed(
717 IDR_PROGRESS_BORDER_LEFT);
718 static SkBitmap* right_border_image = GfxGetBitmapNamed(
719 IDR_PROGRESS_BORDER_RIGHT);
720
721 double tile_scale = static_cast<double>(rect.height()) /
722 bar_image->height();
723
724 int new_tile_width = static_cast<int>(bar_image->width() * tile_scale);
725 double tile_scale_x = static_cast<double>(new_tile_width) /
726 bar_image->width();
727
728 DrawTiledImage(canvas, *bar_image, 0, 0, tile_scale_x, tile_scale,
729 rect.x(), rect.y(), rect.width(), rect.height());
730
731 if (progress_bar.value_rect_width) {
732
733 new_tile_width = static_cast<int>(value_image->width() * tile_scale);
734 tile_scale_x = static_cast<double>(new_tile_width) /
735 value_image->width();
736
737 DrawTiledImage(canvas, *value_image, 0, 0, tile_scale_x, tile_scale,
738 progress_bar.value_rect_x,
739 progress_bar.value_rect_y,
740 progress_bar.value_rect_width,
741 progress_bar.value_rect_height);
742 }
743
744 int dest_left_border_width = static_cast<int>(left_border_image->width() *
745 tile_scale);
746 SkRect dest_rect = {
747 SkIntToScalar(rect.x()),
748 SkIntToScalar(rect.y()),
749 SkIntToScalar(rect.x() + dest_left_border_width),
750 SkIntToScalar(rect.bottom())
751 };
752 canvas->drawBitmapRect(*left_border_image, NULL, dest_rect);
753
754 int dest_right_border_width = static_cast<int>(right_border_image->width() *
755 tile_scale);
756 dest_rect.set(SkIntToScalar(rect.right() - dest_right_border_width),
757 SkIntToScalar(rect.y()),
758 SkIntToScalar(rect.right()),
759 SkIntToScalar(rect.bottom()));
760 canvas->drawBitmapRect(*right_border_image, NULL, dest_rect);
761 }
762
763 bool NativeThemeLinux::IntersectsClipRectInt(
764 skia::PlatformCanvas* canvas, int x, int y, int w, int h) {
765 SkRect clip;
766 return canvas->getClipBounds(&clip) &&
767 clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w),
768 SkIntToScalar(y + h));
769 }
770
771 void NativeThemeLinux::DrawVertLine(SkCanvas* canvas,
772 int x,
773 int y1,
774 int y2,
775 const SkPaint& paint) const {
776 SkIRect skrect;
777 skrect.set(x, y1, x + 1, y2 + 1);
778 canvas->drawIRect(skrect, paint);
779 }
780
781 void NativeThemeLinux::DrawHorizLine(SkCanvas* canvas,
782 int x1,
783 int x2,
784 int y,
785 const SkPaint& paint) const {
786 SkIRect skrect;
787 skrect.set(x1, y, x2 + 1, y + 1);
788 canvas->drawIRect(skrect, paint);
789 }
790
791 void NativeThemeLinux::DrawBox(SkCanvas* canvas,
792 const gfx::Rect& rect,
793 const SkPaint& paint) const {
794 const int right = rect.x() + rect.width() - 1;
795 const int bottom = rect.y() + rect.height() - 1;
796 DrawHorizLine(canvas, rect.x(), right, rect.y(), paint);
797 DrawVertLine(canvas, right, rect.y(), bottom, paint);
798 DrawHorizLine(canvas, rect.x(), right, bottom, paint);
799 DrawVertLine(canvas, rect.x(), rect.y(), bottom, paint);
800 }
801
802 void NativeThemeLinux::DrawBitmapInt(
803 skia::PlatformCanvas* canvas, const SkBitmap& bitmap,
804 int src_x, int src_y, int src_w, int src_h,
805 int dest_x, int dest_y, int dest_w, int dest_h) {
806 DLOG_ASSERT(src_x + src_w < std::numeric_limits<int16_t>::max() &&
807 src_y + src_h < std::numeric_limits<int16_t>::max());
808 if (src_w <= 0 || src_h <= 0 || dest_w <= 0 || dest_h <= 0) {
809 NOTREACHED() << "Attempting to draw bitmap to/from an empty rect!";
810 return;
811 }
812
813 if (!IntersectsClipRectInt(canvas, dest_x, dest_y, dest_w, dest_h))
814 return;
815
816 SkRect dest_rect = { SkIntToScalar(dest_x),
817 SkIntToScalar(dest_y),
818 SkIntToScalar(dest_x + dest_w),
819 SkIntToScalar(dest_y + dest_h) };
820
821 if (src_w == dest_w && src_h == dest_h) {
822 // Workaround for apparent bug in Skia that causes image to occasionally
823 // shift.
824 SkIRect src_rect = { src_x, src_y, src_x + src_w, src_y + src_h };
825 canvas->drawBitmapRect(bitmap, &src_rect, dest_rect);
826 return;
827 }
828
829 // Make a bitmap shader that contains the bitmap we want to draw. This is
830 // basically what SkCanvas.drawBitmap does internally, but it gives us
831 // more control over quality and will use the mipmap in the source image if
832 // it has one, whereas drawBitmap won't.
833 SkShader* shader = SkShader::CreateBitmapShader(bitmap,
834 SkShader::kRepeat_TileMode,
835 SkShader::kRepeat_TileMode);
836 SkMatrix shader_scale;
837 shader_scale.setScale(SkFloatToScalar(static_cast<float>(dest_w) / src_w),
838 SkFloatToScalar(static_cast<float>(dest_h) / src_h));
839 shader_scale.preTranslate(SkIntToScalar(-src_x), SkIntToScalar(-src_y));
840 shader_scale.postTranslate(SkIntToScalar(dest_x), SkIntToScalar(dest_y));
841 shader->setLocalMatrix(shader_scale);
842
843 // The rect will be filled by the bitmap.
844 SkPaint p;
845 p.setFilterBitmap(true);
846 p.setShader(shader);
847 shader->unref();
848 canvas->drawRect(dest_rect, p);
849 }
850
851 void NativeThemeLinux::DrawTiledImage(SkCanvas* canvas,
852 const SkBitmap& bitmap,
853 int src_x, int src_y, double tile_scale_x, double tile_scale_y,
854 int dest_x, int dest_y, int w, int h) const {
855 SkShader* shader = SkShader::CreateBitmapShader(bitmap,
856 SkShader::kRepeat_TileMode,
857 SkShader::kRepeat_TileMode);
858 if (tile_scale_x != 1.0 || tile_scale_y != 1.0) {
859 SkMatrix shader_scale;
860 shader_scale.setScale(SkDoubleToScalar(tile_scale_x),
861 SkDoubleToScalar(tile_scale_y));
862 shader->setLocalMatrix(shader_scale);
863 }
864
865 SkPaint paint;
866 paint.setShader(shader);
867 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
868
869 // CreateBitmapShader returns a Shader with a reference count of one, we
870 // need to unref after paint takes ownership of the shader.
871 shader->unref();
872 canvas->save();
873 canvas->translate(SkIntToScalar(dest_x - src_x),
874 SkIntToScalar(dest_y - src_y));
875 canvas->clipRect(SkRect::MakeXYWH(src_x, src_y, w, h));
876 canvas->drawPaint(paint);
877 canvas->restore();
878 }
879
880 SkScalar NativeThemeLinux::Clamp(SkScalar value,
881 SkScalar min,
882 SkScalar max) const {
883 return std::min(std::max(value, min), max);
884 }
885
886 SkColor NativeThemeLinux::SaturateAndBrighten(SkScalar* hsv,
887 SkScalar saturate_amount,
888 SkScalar brighten_amount) const {
889 SkScalar color[3];
890 color[0] = hsv[0];
891 color[1] = Clamp(hsv[1] + saturate_amount, 0.0, 1.0);
892 color[2] = Clamp(hsv[2] + brighten_amount, 0.0, 1.0);
893 return SkHSVToColor(color);
894 }
895
896 SkColor NativeThemeLinux::OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const {
897 // GTK Theme engines have way too much control over the layout of
898 // the scrollbar. We might be able to more closely approximate its
899 // look-and-feel, if we sent whole images instead of just colors
900 // from the browser to the renderer. But even then, some themes
901 // would just break.
902 //
903 // So, instead, we don't even try to 100% replicate the look of
904 // the native scrollbar. We render our own version, but we make
905 // sure to pick colors that blend in nicely with the system GTK
906 // theme. In most cases, we can just sample a couple of pixels
907 // from the system scrollbar and use those colors to draw our
908 // scrollbar.
909 //
910 // This works fine for the track color and the overall thumb
911 // color. But it fails spectacularly for the outline color used
912 // around the thumb piece. Not all themes have a clearly defined
913 // outline. For some of them it is partially transparent, and for
914 // others the thickness is very unpredictable.
915 //
916 // So, instead of trying to approximate the system theme, we
917 // instead try to compute a reasonable looking choice based on the
918 // known color of the track and the thumb piece. This is difficult
919 // when trying to deal both with high- and low-contrast themes,
920 // and both with positive and inverted themes.
921 //
922 // The following code has been tested to look OK with all of the
923 // default GTK themes.
924 SkScalar min_diff = Clamp((hsv1[1] + hsv2[1]) * 1.2, 0.28, 0.5);
925 SkScalar diff = Clamp(fabs(hsv1[2] - hsv2[2]) / 2, min_diff, 0.5);
926
927 if (hsv1[2] + hsv2[2] > 1.0)
928 diff = -diff;
929
930 return SaturateAndBrighten(hsv2, -0.2, diff);
931 }
932
933 void NativeThemeLinux::SetScrollbarColors(unsigned inactive_color,
934 unsigned active_color,
935 unsigned track_color) const {
936 thumb_inactive_color_ = inactive_color;
937 thumb_active_color_ = active_color;
938 track_color_ = track_color;
939 }
940
941 } // namespace gfx
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