1 // Copyright (c) 2012 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.
5 #include "ui/gfx/render_text.h"
10 #include "base/command_line.h"
11 #include "base/i18n/break_iterator.h"
12 #include "base/logging.h"
13 #include "base/stl_util.h"
14 #include "base/strings/utf_string_conversions.h"
15 #include "third_party/icu/source/common/unicode/rbbi.h"
16 #include "third_party/icu/source/common/unicode/utf16.h"
17 #include "third_party/skia/include/core/SkTypeface.h"
18 #include "third_party/skia/include/effects/SkGradientShader.h"
19 #include "ui/gfx/canvas.h"
20 #include "ui/gfx/insets.h"
21 #include "ui/gfx/render_text_harfbuzz.h"
22 #include "ui/gfx/scoped_canvas.h"
23 #include "ui/gfx/skia_util.h"
24 #include "ui/gfx/switches.h"
25 #include "ui/gfx/text_constants.h"
26 #include "ui/gfx/text_elider.h"
27 #include "ui/gfx/text_utils.h"
28 #include "ui/gfx/utf16_indexing.h"
34 // All chars are replaced by this char when the password style is set.
35 // TODO(benrg): GTK uses the first of U+25CF, U+2022, U+2731, U+273A, '*'
36 // that's available in the font (find_invisible_char() in gtkentry.c).
37 const base::char16 kPasswordReplacementChar
= '*';
39 // Default color used for the text and cursor.
40 const SkColor kDefaultColor
= SK_ColorBLACK
;
42 // Default color used for drawing selection background.
43 const SkColor kDefaultSelectionBackgroundColor
= SK_ColorGRAY
;
45 // Fraction of the text size to lower a strike through below the baseline.
46 const SkScalar kStrikeThroughOffset
= (-SK_Scalar1
* 6 / 21);
47 // Fraction of the text size to lower an underline below the baseline.
48 const SkScalar kUnderlineOffset
= (SK_Scalar1
/ 9);
49 // Fraction of the text size to use for a strike through or under-line.
50 const SkScalar kLineThickness
= (SK_Scalar1
/ 18);
51 // Fraction of the text size to use for a top margin of a diagonal strike.
52 const SkScalar kDiagonalStrikeMarginOffset
= (SK_Scalar1
/ 4);
54 // Invalid value of baseline. Assigning this value to |baseline_| causes
55 // re-calculation of baseline.
56 const int kInvalidBaseline
= INT_MAX
;
58 // Returns the baseline, with which the text best appears vertically centered.
59 int DetermineBaselineCenteringText(const Rect
& display_rect
,
60 const FontList
& font_list
) {
61 const int display_height
= display_rect
.height();
62 const int font_height
= font_list
.GetHeight();
63 // Lower and upper bound of baseline shift as we try to show as much area of
64 // text as possible. In particular case of |display_height| == |font_height|,
65 // we do not want to shift the baseline.
66 const int min_shift
= std::min(0, display_height
- font_height
);
67 const int max_shift
= std::abs(display_height
- font_height
);
68 const int baseline
= font_list
.GetBaseline();
69 const int cap_height
= font_list
.GetCapHeight();
70 const int internal_leading
= baseline
- cap_height
;
71 // Some platforms don't support getting the cap height, and simply return
72 // the entire font ascent from GetCapHeight(). Centering the ascent makes
73 // the font look too low, so if GetCapHeight() returns the ascent, center
74 // the entire font height instead.
76 display_height
- ((internal_leading
!= 0) ? cap_height
: font_height
);
77 const int baseline_shift
= space
/ 2 - internal_leading
;
78 return baseline
+ std::max(min_shift
, std::min(max_shift
, baseline_shift
));
81 // Converts |Font::FontStyle| flags to |SkTypeface::Style| flags.
82 SkTypeface::Style
ConvertFontStyleToSkiaTypefaceStyle(int font_style
) {
83 int skia_style
= SkTypeface::kNormal
;
84 skia_style
|= (font_style
& Font::BOLD
) ? SkTypeface::kBold
: 0;
85 skia_style
|= (font_style
& Font::ITALIC
) ? SkTypeface::kItalic
: 0;
86 return static_cast<SkTypeface::Style
>(skia_style
);
89 // Given |font| and |display_width|, returns the width of the fade gradient.
90 int CalculateFadeGradientWidth(const FontList
& font_list
, int display_width
) {
91 // Fade in/out about 2.5 characters of the beginning/end of the string.
92 // The .5 here is helpful if one of the characters is a space.
93 // Use a quarter of the display width if the display width is very short.
94 const int average_character_width
= font_list
.GetExpectedTextWidth(1);
95 const double gradient_width
= std::min(average_character_width
* 2.5,
97 DCHECK_GE(gradient_width
, 0.0);
98 return static_cast<int>(floor(gradient_width
+ 0.5));
101 // Appends to |positions| and |colors| values corresponding to the fade over
102 // |fade_rect| from color |c0| to color |c1|.
103 void AddFadeEffect(const Rect
& text_rect
,
104 const Rect
& fade_rect
,
107 std::vector
<SkScalar
>* positions
,
108 std::vector
<SkColor
>* colors
) {
109 const SkScalar left
= static_cast<SkScalar
>(fade_rect
.x() - text_rect
.x());
110 const SkScalar width
= static_cast<SkScalar
>(fade_rect
.width());
111 const SkScalar p0
= left
/ text_rect
.width();
112 const SkScalar p1
= (left
+ width
) / text_rect
.width();
113 // Prepend 0.0 to |positions|, as required by Skia.
114 if (positions
->empty() && p0
!= 0.0) {
115 positions
->push_back(0.0);
116 colors
->push_back(c0
);
118 positions
->push_back(p0
);
119 colors
->push_back(c0
);
120 positions
->push_back(p1
);
121 colors
->push_back(c1
);
124 // Creates a SkShader to fade the text, with |left_part| specifying the left
125 // fade effect, if any, and |right_part| specifying the right fade effect.
126 skia::RefPtr
<SkShader
> CreateFadeShader(const Rect
& text_rect
,
127 const Rect
& left_part
,
128 const Rect
& right_part
,
130 // Fade alpha of 51/255 corresponds to a fade of 0.2 of the original color.
131 const SkColor fade_color
= SkColorSetA(color
, 51);
132 std::vector
<SkScalar
> positions
;
133 std::vector
<SkColor
> colors
;
135 if (!left_part
.IsEmpty())
136 AddFadeEffect(text_rect
, left_part
, fade_color
, color
,
137 &positions
, &colors
);
138 if (!right_part
.IsEmpty())
139 AddFadeEffect(text_rect
, right_part
, color
, fade_color
,
140 &positions
, &colors
);
141 DCHECK(!positions
.empty());
143 // Terminate |positions| with 1.0, as required by Skia.
144 if (positions
.back() != 1.0) {
145 positions
.push_back(1.0);
146 colors
.push_back(colors
.back());
150 points
[0].iset(text_rect
.x(), text_rect
.y());
151 points
[1].iset(text_rect
.right(), text_rect
.y());
153 return skia::AdoptRef(
154 SkGradientShader::CreateLinear(&points
[0], &colors
[0], &positions
[0],
155 colors
.size(), SkShader::kClamp_TileMode
));
162 // Value of |underline_thickness_| that indicates that underline metrics have
163 // not been set explicitly.
164 const SkScalar kUnderlineMetricsNotSet
= -1.0f
;
166 SkiaTextRenderer::SkiaTextRenderer(Canvas
* canvas
)
168 canvas_skia_(canvas
->sk_canvas()),
169 started_drawing_(false),
170 underline_thickness_(kUnderlineMetricsNotSet
),
171 underline_position_(0.0f
) {
172 DCHECK(canvas_skia_
);
173 paint_
.setTextEncoding(SkPaint::kGlyphID_TextEncoding
);
174 paint_
.setStyle(SkPaint::kFill_Style
);
175 paint_
.setAntiAlias(true);
176 paint_
.setSubpixelText(true);
177 paint_
.setLCDRenderText(true);
178 paint_
.setHinting(SkPaint::kNormal_Hinting
);
182 SkiaTextRenderer::~SkiaTextRenderer() {
183 // Work-around for http://crbug.com/122743, where non-ClearType text is
184 // rendered with incorrect gamma when using the fade shader. Draw the text
185 // to a layer and restore it faded by drawing a rect in kDstIn_Mode mode.
187 // TODO(asvitkine): Remove this work-around once the Skia bug is fixed.
188 // http://code.google.com/p/skia/issues/detail?id=590
189 if (deferred_fade_shader_
.get()) {
190 paint_
.setShader(deferred_fade_shader_
.get());
191 paint_
.setXfermodeMode(SkXfermode::kDstIn_Mode
);
192 canvas_skia_
->drawRect(bounds_
, paint_
);
193 canvas_skia_
->restore();
197 void SkiaTextRenderer::SetDrawLooper(SkDrawLooper
* draw_looper
) {
198 paint_
.setLooper(draw_looper
);
201 void SkiaTextRenderer::SetFontSmoothingSettings(bool antialiasing
,
202 bool subpixel_rendering
,
203 bool subpixel_positioning
) {
204 paint_
.setAntiAlias(antialiasing
);
205 paint_
.setLCDRenderText(subpixel_rendering
);
206 paint_
.setSubpixelText(subpixel_positioning
);
209 void SkiaTextRenderer::SetFontHinting(SkPaint::Hinting hinting
) {
210 paint_
.setHinting(hinting
);
213 void SkiaTextRenderer::SetTypeface(SkTypeface
* typeface
) {
214 paint_
.setTypeface(typeface
);
217 void SkiaTextRenderer::SetTextSize(SkScalar size
) {
218 paint_
.setTextSize(size
);
221 void SkiaTextRenderer::SetFontFamilyWithStyle(const std::string
& family
,
223 DCHECK(!family
.empty());
225 skia::RefPtr
<SkTypeface
> typeface
= CreateSkiaTypeface(family
.c_str(), style
);
227 // |paint_| adds its own ref. So don't |release()| it from the ref ptr here.
228 SetTypeface(typeface
.get());
230 // Enable fake bold text if bold style is needed but new typeface does not
232 paint_
.setFakeBoldText((style
& Font::BOLD
) && !typeface
->isBold());
236 void SkiaTextRenderer::SetForegroundColor(SkColor foreground
) {
237 paint_
.setColor(foreground
);
240 void SkiaTextRenderer::SetShader(SkShader
* shader
, const Rect
& bounds
) {
241 bounds_
= RectToSkRect(bounds
);
242 paint_
.setShader(shader
);
245 void SkiaTextRenderer::SetUnderlineMetrics(SkScalar thickness
,
247 underline_thickness_
= thickness
;
248 underline_position_
= position
;
251 void SkiaTextRenderer::DrawPosText(const SkPoint
* pos
,
252 const uint16
* glyphs
,
253 size_t glyph_count
) {
254 if (!started_drawing_
) {
255 started_drawing_
= true;
256 // Work-around for http://crbug.com/122743, where non-ClearType text is
257 // rendered with incorrect gamma when using the fade shader. Draw the text
258 // to a layer and restore it faded by drawing a rect in kDstIn_Mode mode.
260 // Skip this when there is a looper which seems not working well with
261 // deferred paint. Currently a looper is only used for text shadows.
263 // TODO(asvitkine): Remove this work-around once the Skia bug is fixed.
264 // http://code.google.com/p/skia/issues/detail?id=590
265 if (!paint_
.isLCDRenderText() &&
266 paint_
.getShader() &&
267 !paint_
.getLooper()) {
268 deferred_fade_shader_
= skia::SharePtr(paint_
.getShader());
269 paint_
.setShader(NULL
);
270 canvas_skia_
->saveLayer(&bounds_
, NULL
);
274 const size_t byte_length
= glyph_count
* sizeof(glyphs
[0]);
275 canvas_skia_
->drawPosText(&glyphs
[0], byte_length
, &pos
[0], paint_
);
278 void SkiaTextRenderer::DrawDecorations(int x
, int y
, int width
, bool underline
,
279 bool strike
, bool diagonal_strike
) {
281 DrawUnderline(x
, y
, width
);
283 DrawStrike(x
, y
, width
);
284 if (diagonal_strike
) {
286 diagonal_
.reset(new DiagonalStrike(canvas_
, Point(x
, y
), paint_
));
287 diagonal_
->AddPiece(width
, paint_
.getColor());
288 } else if (diagonal_
) {
293 void SkiaTextRenderer::EndDiagonalStrike() {
300 void SkiaTextRenderer::DrawUnderline(int x
, int y
, int width
) {
301 SkRect r
= SkRect::MakeLTRB(x
, y
+ underline_position_
, x
+ width
,
302 y
+ underline_position_
+ underline_thickness_
);
303 if (underline_thickness_
== kUnderlineMetricsNotSet
) {
304 const SkScalar text_size
= paint_
.getTextSize();
305 r
.fTop
= SkScalarMulAdd(text_size
, kUnderlineOffset
, y
);
306 r
.fBottom
= r
.fTop
+ SkScalarMul(text_size
, kLineThickness
);
308 canvas_skia_
->drawRect(r
, paint_
);
311 void SkiaTextRenderer::DrawStrike(int x
, int y
, int width
) const {
312 const SkScalar text_size
= paint_
.getTextSize();
313 const SkScalar height
= SkScalarMul(text_size
, kLineThickness
);
314 const SkScalar offset
= SkScalarMulAdd(text_size
, kStrikeThroughOffset
, y
);
315 const SkRect r
= SkRect::MakeLTRB(x
, offset
, x
+ width
, offset
+ height
);
316 canvas_skia_
->drawRect(r
, paint_
);
319 SkiaTextRenderer::DiagonalStrike::DiagonalStrike(Canvas
* canvas
,
321 const SkPaint
& paint
)
328 SkiaTextRenderer::DiagonalStrike::~DiagonalStrike() {
331 void SkiaTextRenderer::DiagonalStrike::AddPiece(int length
, SkColor color
) {
332 pieces_
.push_back(Piece(length
, color
));
333 total_length_
+= length
;
336 void SkiaTextRenderer::DiagonalStrike::Draw() {
337 const SkScalar text_size
= paint_
.getTextSize();
338 const SkScalar offset
= SkScalarMul(text_size
, kDiagonalStrikeMarginOffset
);
339 const int thickness
=
340 SkScalarCeilToInt(SkScalarMul(text_size
, kLineThickness
) * 2);
341 const int height
= SkScalarCeilToInt(text_size
- offset
);
342 const Point end
= start_
+ Vector2d(total_length_
, -height
);
343 const int clip_height
= height
+ 2 * thickness
;
345 paint_
.setAntiAlias(true);
346 paint_
.setStrokeWidth(thickness
);
348 const bool clipped
= pieces_
.size() > 1;
349 SkCanvas
* sk_canvas
= canvas_
->sk_canvas();
352 for (size_t i
= 0; i
< pieces_
.size(); ++i
) {
353 paint_
.setColor(pieces_
[i
].second
);
357 sk_canvas
->clipRect(RectToSkRect(
358 Rect(x
, end
.y() - thickness
, pieces_
[i
].first
, clip_height
)));
361 canvas_
->DrawLine(start_
, end
, paint_
);
366 x
+= pieces_
[i
].first
;
370 StyleIterator::StyleIterator(const BreakList
<SkColor
>& colors
,
371 const std::vector
<BreakList
<bool> >& styles
)
374 color_
= colors_
.breaks().begin();
375 for (size_t i
= 0; i
< styles_
.size(); ++i
)
376 style_
.push_back(styles_
[i
].breaks().begin());
379 StyleIterator::~StyleIterator() {}
381 Range
StyleIterator::GetRange() const {
382 Range
range(colors_
.GetRange(color_
));
383 for (size_t i
= 0; i
< NUM_TEXT_STYLES
; ++i
)
384 range
= range
.Intersect(styles_
[i
].GetRange(style_
[i
]));
388 void StyleIterator::UpdatePosition(size_t position
) {
389 color_
= colors_
.GetBreak(position
);
390 for (size_t i
= 0; i
< NUM_TEXT_STYLES
; ++i
)
391 style_
[i
] = styles_
[i
].GetBreak(position
);
394 LineSegment::LineSegment() : run(0) {}
396 LineSegment::~LineSegment() {}
398 Line::Line() : preceding_heights(0), baseline(0) {}
402 skia::RefPtr
<SkTypeface
> CreateSkiaTypeface(const std::string
& family
,
404 SkTypeface::Style skia_style
= ConvertFontStyleToSkiaTypefaceStyle(style
);
405 return skia::AdoptRef(SkTypeface::CreateFromName(family
.c_str(), skia_style
));
408 } // namespace internal
410 RenderText::~RenderText() {
413 RenderText
* RenderText::CreateInstance() {
414 #if defined(OS_MACOSX) && defined(TOOLKIT_VIEWS)
415 // Use the more complete HarfBuzz implementation for Views controls on Mac.
416 return new RenderTextHarfBuzz
;
418 if (CommandLine::ForCurrentProcess()->HasSwitch(
419 switches::kEnableHarfBuzzRenderText
)) {
420 return new RenderTextHarfBuzz
;
422 return CreateNativeInstance();
426 void RenderText::SetText(const base::string16
& text
) {
427 DCHECK(!composition_range_
.IsValid());
432 // Adjust ranged styles and colors to accommodate a new text length.
433 const size_t text_length
= text_
.length();
434 colors_
.SetMax(text_length
);
435 for (size_t style
= 0; style
< NUM_TEXT_STYLES
; ++style
)
436 styles_
[style
].SetMax(text_length
);
437 cached_bounds_and_offset_valid_
= false;
439 // Reset selection model. SetText should always followed by SetSelectionModel
440 // or SetCursorPosition in upper layer.
441 SetSelectionModel(SelectionModel());
443 // Invalidate the cached text direction if it depends on the text contents.
444 if (directionality_mode_
== DIRECTIONALITY_FROM_TEXT
)
445 text_direction_
= base::i18n::UNKNOWN_DIRECTION
;
447 obscured_reveal_index_
= -1;
451 void RenderText::SetHorizontalAlignment(HorizontalAlignment alignment
) {
452 if (horizontal_alignment_
!= alignment
) {
453 horizontal_alignment_
= alignment
;
454 display_offset_
= Vector2d();
455 cached_bounds_and_offset_valid_
= false;
459 void RenderText::SetFontList(const FontList
& font_list
) {
460 font_list_
= font_list
;
461 baseline_
= kInvalidBaseline
;
462 cached_bounds_and_offset_valid_
= false;
466 void RenderText::SetCursorEnabled(bool cursor_enabled
) {
467 cursor_enabled_
= cursor_enabled
;
468 cached_bounds_and_offset_valid_
= false;
471 void RenderText::ToggleInsertMode() {
472 insert_mode_
= !insert_mode_
;
473 cached_bounds_and_offset_valid_
= false;
476 void RenderText::SetObscured(bool obscured
) {
477 if (obscured
!= obscured_
) {
478 obscured_
= obscured
;
479 obscured_reveal_index_
= -1;
480 cached_bounds_and_offset_valid_
= false;
485 void RenderText::SetObscuredRevealIndex(int index
) {
486 if (obscured_reveal_index_
== index
)
489 obscured_reveal_index_
= index
;
490 cached_bounds_and_offset_valid_
= false;
494 void RenderText::SetMultiline(bool multiline
) {
495 if (multiline
!= multiline_
) {
496 multiline_
= multiline
;
497 cached_bounds_and_offset_valid_
= false;
502 void RenderText::SetElideBehavior(ElideBehavior elide_behavior
) {
503 // TODO(skanuj) : Add a test for triggering layout change.
504 if (elide_behavior_
!= elide_behavior
) {
505 elide_behavior_
= elide_behavior
;
510 void RenderText::SetDisplayRect(const Rect
& r
) {
511 if (r
!= display_rect_
) {
513 baseline_
= kInvalidBaseline
;
514 cached_bounds_and_offset_valid_
= false;
516 if (elide_behavior_
!= TRUNCATE
)
521 void RenderText::SetCursorPosition(size_t position
) {
522 MoveCursorTo(position
, false);
525 void RenderText::MoveCursor(BreakType break_type
,
526 VisualCursorDirection direction
,
528 SelectionModel
cursor(cursor_position(), selection_model_
.caret_affinity());
529 // Cancelling a selection moves to the edge of the selection.
530 if (break_type
!= LINE_BREAK
&& !selection().is_empty() && !select
) {
531 SelectionModel selection_start
= GetSelectionModelForSelectionStart();
532 int start_x
= GetCursorBounds(selection_start
, true).x();
533 int cursor_x
= GetCursorBounds(cursor
, true).x();
534 // Use the selection start if it is left (when |direction| is CURSOR_LEFT)
535 // or right (when |direction| is CURSOR_RIGHT) of the selection end.
536 if (direction
== CURSOR_RIGHT
? start_x
> cursor_x
: start_x
< cursor_x
)
537 cursor
= selection_start
;
538 // Use the nearest word boundary in the proper |direction| for word breaks.
539 if (break_type
== WORD_BREAK
)
540 cursor
= GetAdjacentSelectionModel(cursor
, break_type
, direction
);
541 // Use an adjacent selection model if the cursor is not at a valid position.
542 if (!IsValidCursorIndex(cursor
.caret_pos()))
543 cursor
= GetAdjacentSelectionModel(cursor
, CHARACTER_BREAK
, direction
);
545 cursor
= GetAdjacentSelectionModel(cursor
, break_type
, direction
);
548 cursor
.set_selection_start(selection().start());
549 MoveCursorTo(cursor
);
552 bool RenderText::MoveCursorTo(const SelectionModel
& model
) {
553 // Enforce valid selection model components.
554 size_t text_length
= text().length();
555 Range
range(std::min(model
.selection().start(), text_length
),
556 std::min(model
.caret_pos(), text_length
));
557 // The current model only supports caret positions at valid cursor indices.
558 if (!IsValidCursorIndex(range
.start()) || !IsValidCursorIndex(range
.end()))
560 SelectionModel
sel(range
, model
.caret_affinity());
561 bool changed
= sel
!= selection_model_
;
562 SetSelectionModel(sel
);
566 bool RenderText::SelectRange(const Range
& range
) {
567 Range
sel(std::min(range
.start(), text().length()),
568 std::min(range
.end(), text().length()));
569 // Allow selection bounds at valid indicies amid multi-character graphemes.
570 if (!IsValidLogicalIndex(sel
.start()) || !IsValidLogicalIndex(sel
.end()))
572 LogicalCursorDirection affinity
=
573 (sel
.is_reversed() || sel
.is_empty()) ? CURSOR_FORWARD
: CURSOR_BACKWARD
;
574 SetSelectionModel(SelectionModel(sel
, affinity
));
578 bool RenderText::IsPointInSelection(const Point
& point
) {
579 if (selection().is_empty())
581 SelectionModel cursor
= FindCursorPosition(point
);
582 return RangeContainsCaret(
583 selection(), cursor
.caret_pos(), cursor
.caret_affinity());
586 void RenderText::ClearSelection() {
587 SetSelectionModel(SelectionModel(cursor_position(),
588 selection_model_
.caret_affinity()));
591 void RenderText::SelectAll(bool reversed
) {
592 const size_t length
= text().length();
593 const Range all
= reversed
? Range(length
, 0) : Range(0, length
);
594 const bool success
= SelectRange(all
);
598 void RenderText::SelectWord() {
604 size_t selection_max
= selection().GetMax();
606 base::i18n::BreakIterator
iter(text(), base::i18n::BreakIterator::BREAK_WORD
);
607 bool success
= iter
.Init();
612 size_t selection_min
= selection().GetMin();
613 if (selection_min
== text().length() && selection_min
!= 0)
616 for (; selection_min
!= 0; --selection_min
) {
617 if (iter
.IsStartOfWord(selection_min
) ||
618 iter
.IsEndOfWord(selection_min
))
622 if (selection_min
== selection_max
&& selection_max
!= text().length())
625 for (; selection_max
< text().length(); ++selection_max
)
626 if (iter
.IsEndOfWord(selection_max
) || iter
.IsStartOfWord(selection_max
))
629 const bool reversed
= selection().is_reversed();
630 MoveCursorTo(reversed
? selection_max
: selection_min
, false);
631 MoveCursorTo(reversed
? selection_min
: selection_max
, true);
634 const Range
& RenderText::GetCompositionRange() const {
635 return composition_range_
;
638 void RenderText::SetCompositionRange(const Range
& composition_range
) {
639 CHECK(!composition_range
.IsValid() ||
640 Range(0, text_
.length()).Contains(composition_range
));
641 composition_range_
.set_end(composition_range
.end());
642 composition_range_
.set_start(composition_range
.start());
646 void RenderText::SetColor(SkColor value
) {
647 colors_
.SetValue(value
);
650 // TODO(msw): Windows applies colors and decorations in the layout process.
651 cached_bounds_and_offset_valid_
= false;
656 void RenderText::ApplyColor(SkColor value
, const Range
& range
) {
657 colors_
.ApplyValue(value
, range
);
660 // TODO(msw): Windows applies colors and decorations in the layout process.
661 cached_bounds_and_offset_valid_
= false;
666 void RenderText::SetStyle(TextStyle style
, bool value
) {
667 styles_
[style
].SetValue(value
);
669 // Only invalidate the layout on font changes; not for colors or decorations.
670 bool invalidate
= (style
== BOLD
) || (style
== ITALIC
);
672 // TODO(msw): Windows applies colors and decorations in the layout process.
676 cached_bounds_and_offset_valid_
= false;
681 void RenderText::ApplyStyle(TextStyle style
, bool value
, const Range
& range
) {
682 styles_
[style
].ApplyValue(value
, range
);
684 // Only invalidate the layout on font changes; not for colors or decorations.
685 bool invalidate
= (style
== BOLD
) || (style
== ITALIC
);
687 // TODO(msw): Windows applies colors and decorations in the layout process.
691 cached_bounds_and_offset_valid_
= false;
696 bool RenderText::GetStyle(TextStyle style
) const {
697 return (styles_
[style
].breaks().size() == 1) &&
698 styles_
[style
].breaks().front().second
;
701 void RenderText::SetDirectionalityMode(DirectionalityMode mode
) {
702 if (mode
== directionality_mode_
)
705 directionality_mode_
= mode
;
706 text_direction_
= base::i18n::UNKNOWN_DIRECTION
;
707 cached_bounds_and_offset_valid_
= false;
711 base::i18n::TextDirection
RenderText::GetTextDirection() {
712 if (text_direction_
== base::i18n::UNKNOWN_DIRECTION
) {
713 switch (directionality_mode_
) {
714 case DIRECTIONALITY_FROM_TEXT
:
715 // Derive the direction from the display text, which differs from text()
716 // in the case of obscured (password) textfields.
718 base::i18n::GetFirstStrongCharacterDirection(GetLayoutText());
720 case DIRECTIONALITY_FROM_UI
:
721 text_direction_
= base::i18n::IsRTL() ? base::i18n::RIGHT_TO_LEFT
:
722 base::i18n::LEFT_TO_RIGHT
;
724 case DIRECTIONALITY_FORCE_LTR
:
725 text_direction_
= base::i18n::LEFT_TO_RIGHT
;
727 case DIRECTIONALITY_FORCE_RTL
:
728 text_direction_
= base::i18n::RIGHT_TO_LEFT
;
735 return text_direction_
;
738 VisualCursorDirection
RenderText::GetVisualDirectionOfLogicalEnd() {
739 return GetTextDirection() == base::i18n::LEFT_TO_RIGHT
?
740 CURSOR_RIGHT
: CURSOR_LEFT
;
743 SizeF
RenderText::GetStringSizeF() {
744 const Size size
= GetStringSize();
745 return SizeF(size
.width(), size
.height());
748 int RenderText::GetContentWidth() {
749 return GetStringSize().width() + (cursor_enabled_
? 1 : 0);
752 int RenderText::GetBaseline() {
753 if (baseline_
== kInvalidBaseline
)
754 baseline_
= DetermineBaselineCenteringText(display_rect(), font_list());
755 DCHECK_NE(kInvalidBaseline
, baseline_
);
759 void RenderText::Draw(Canvas
* canvas
) {
762 if (clip_to_display_rect()) {
763 Rect
clip_rect(display_rect());
764 clip_rect
.Inset(ShadowValue::GetMargin(shadows_
));
767 canvas
->ClipRect(clip_rect
);
770 if (!text().empty() && focused())
771 DrawSelection(canvas
);
773 if (cursor_enabled() && cursor_visible() && focused())
774 DrawCursor(canvas
, selection_model_
);
777 DrawVisualText(canvas
);
779 if (clip_to_display_rect())
783 void RenderText::DrawCursor(Canvas
* canvas
, const SelectionModel
& position
) {
784 // Paint cursor. Replace cursor is drawn as rectangle for now.
785 // TODO(msw): Draw a better cursor with a better indication of association.
786 canvas
->FillRect(GetCursorBounds(position
, true), cursor_color_
);
789 bool RenderText::IsValidLogicalIndex(size_t index
) {
790 // Check that the index is at a valid code point (not mid-surrgate-pair) and
791 // that it's not truncated from the layout text (its glyph may be shown).
793 // Indices within truncated text are disallowed so users can easily interact
794 // with the underlying truncated text using the ellipsis as a proxy. This lets
795 // users select all text, select the truncated text, and transition from the
796 // last rendered glyph to the end of the text without getting invisible cursor
797 // positions nor needing unbounded arrow key presses to traverse the ellipsis.
798 return index
== 0 || index
== text().length() ||
799 (index
< text().length() &&
800 (truncate_length_
== 0 || index
< truncate_length_
) &&
801 IsValidCodePointIndex(text(), index
));
804 Rect
RenderText::GetCursorBounds(const SelectionModel
& caret
,
806 // TODO(ckocagil): Support multiline. This function should return the height
807 // of the line the cursor is on. |GetStringSize()| now returns
808 // the multiline size, eliminate its use here.
811 size_t caret_pos
= caret
.caret_pos();
812 DCHECK(IsValidLogicalIndex(caret_pos
));
813 // In overtype mode, ignore the affinity and always indicate that we will
814 // overtype the next character.
815 LogicalCursorDirection caret_affinity
=
816 insert_mode
? caret
.caret_affinity() : CURSOR_FORWARD
;
817 int x
= 0, width
= 1;
818 Size size
= GetStringSize();
819 if (caret_pos
== (caret_affinity
== CURSOR_BACKWARD
? 0 : text().length())) {
820 // The caret is attached to the boundary. Always return a 1-dip width caret,
821 // since there is nothing to overtype.
822 if ((GetTextDirection() == base::i18n::RIGHT_TO_LEFT
) == (caret_pos
== 0))
825 size_t grapheme_start
= (caret_affinity
== CURSOR_FORWARD
) ?
826 caret_pos
: IndexOfAdjacentGrapheme(caret_pos
, CURSOR_BACKWARD
);
827 Range
xspan(GetGlyphBounds(grapheme_start
));
829 x
= (caret_affinity
== CURSOR_BACKWARD
) ? xspan
.end() : xspan
.start();
830 } else { // overtype mode
832 width
= xspan
.length();
835 return Rect(ToViewPoint(Point(x
, 0)), Size(width
, size
.height()));
838 const Rect
& RenderText::GetUpdatedCursorBounds() {
839 UpdateCachedBoundsAndOffset();
840 return cursor_bounds_
;
843 size_t RenderText::IndexOfAdjacentGrapheme(size_t index
,
844 LogicalCursorDirection direction
) {
845 if (index
> text().length())
846 return text().length();
850 if (direction
== CURSOR_FORWARD
) {
851 while (index
< text().length()) {
853 if (IsValidCursorIndex(index
))
856 return text().length();
861 if (IsValidCursorIndex(index
))
867 SelectionModel
RenderText::GetSelectionModelForSelectionStart() {
868 const Range
& sel
= selection();
870 return selection_model_
;
871 return SelectionModel(sel
.start(),
872 sel
.is_reversed() ? CURSOR_BACKWARD
: CURSOR_FORWARD
);
875 RenderText::RenderText()
876 : horizontal_alignment_(base::i18n::IsRTL() ? ALIGN_RIGHT
: ALIGN_LEFT
),
877 directionality_mode_(DIRECTIONALITY_FROM_TEXT
),
878 text_direction_(base::i18n::UNKNOWN_DIRECTION
),
879 cursor_enabled_(true),
880 cursor_visible_(false),
882 cursor_color_(kDefaultColor
),
883 selection_color_(kDefaultColor
),
884 selection_background_focused_color_(kDefaultSelectionBackgroundColor
),
886 composition_range_(Range::InvalidRange()),
887 colors_(kDefaultColor
),
888 styles_(NUM_TEXT_STYLES
),
889 composition_and_selection_styles_applied_(false),
891 obscured_reveal_index_(-1),
893 elide_behavior_(TRUNCATE
),
895 background_is_transparent_(false),
896 clip_to_display_rect_(true),
897 baseline_(kInvalidBaseline
),
898 cached_bounds_and_offset_valid_(false) {
901 const Vector2d
& RenderText::GetUpdatedDisplayOffset() {
902 UpdateCachedBoundsAndOffset();
903 return display_offset_
;
906 SelectionModel
RenderText::GetAdjacentSelectionModel(
907 const SelectionModel
& current
,
908 BreakType break_type
,
909 VisualCursorDirection direction
) {
912 if (break_type
== LINE_BREAK
|| text().empty())
913 return EdgeSelectionModel(direction
);
914 if (break_type
== CHARACTER_BREAK
)
915 return AdjacentCharSelectionModel(current
, direction
);
916 DCHECK(break_type
== WORD_BREAK
);
917 return AdjacentWordSelectionModel(current
, direction
);
920 SelectionModel
RenderText::EdgeSelectionModel(
921 VisualCursorDirection direction
) {
922 if (direction
== GetVisualDirectionOfLogicalEnd())
923 return SelectionModel(text().length(), CURSOR_FORWARD
);
924 return SelectionModel(0, CURSOR_BACKWARD
);
927 void RenderText::SetSelectionModel(const SelectionModel
& model
) {
928 DCHECK_LE(model
.selection().GetMax(), text().length());
929 selection_model_
= model
;
930 cached_bounds_and_offset_valid_
= false;
933 const base::string16
& RenderText::GetLayoutText() const {
937 const BreakList
<size_t>& RenderText::GetLineBreaks() {
938 if (line_breaks_
.max() != 0)
941 const base::string16
& layout_text
= GetLayoutText();
942 const size_t text_length
= layout_text
.length();
943 line_breaks_
.SetValue(0);
944 line_breaks_
.SetMax(text_length
);
945 base::i18n::BreakIterator
iter(layout_text
,
946 base::i18n::BreakIterator::BREAK_LINE
);
947 const bool success
= iter
.Init();
951 line_breaks_
.ApplyValue(iter
.pos(), Range(iter
.pos(), text_length
));
952 } while (iter
.Advance());
957 void RenderText::ApplyCompositionAndSelectionStyles() {
958 // Save the underline and color breaks to undo the temporary styles later.
959 DCHECK(!composition_and_selection_styles_applied_
);
960 saved_colors_
= colors_
;
961 saved_underlines_
= styles_
[UNDERLINE
];
963 // Apply an underline to the composition range in |underlines|.
964 if (composition_range_
.IsValid() && !composition_range_
.is_empty())
965 styles_
[UNDERLINE
].ApplyValue(true, composition_range_
);
967 // Apply the selected text color to the [un-reversed] selection range.
968 if (!selection().is_empty() && focused()) {
969 const Range
range(selection().GetMin(), selection().GetMax());
970 colors_
.ApplyValue(selection_color_
, range
);
972 composition_and_selection_styles_applied_
= true;
975 void RenderText::UndoCompositionAndSelectionStyles() {
976 // Restore the underline and color breaks to undo the temporary styles.
977 DCHECK(composition_and_selection_styles_applied_
);
978 colors_
= saved_colors_
;
979 styles_
[UNDERLINE
] = saved_underlines_
;
980 composition_and_selection_styles_applied_
= false;
983 Vector2d
RenderText::GetLineOffset(size_t line_number
) {
984 Vector2d offset
= display_rect().OffsetFromOrigin();
985 // TODO(ckocagil): Apply the display offset for multiline scrolling.
987 offset
.Add(GetUpdatedDisplayOffset());
989 offset
.Add(Vector2d(0, lines_
[line_number
].preceding_heights
));
990 offset
.Add(GetAlignmentOffset(line_number
));
994 Point
RenderText::ToTextPoint(const Point
& point
) {
995 return point
- GetLineOffset(0);
996 // TODO(ckocagil): Convert multiline view space points to text space.
999 Point
RenderText::ToViewPoint(const Point
& point
) {
1001 return point
+ GetLineOffset(0);
1003 // TODO(ckocagil): Traverse individual line segments for RTL support.
1004 DCHECK(!lines_
.empty());
1007 for (; line
< lines_
.size() && x
> lines_
[line
].size
.width(); ++line
)
1008 x
-= lines_
[line
].size
.width();
1009 return Point(x
, point
.y()) + GetLineOffset(line
);
1012 std::vector
<Rect
> RenderText::TextBoundsToViewBounds(const Range
& x
) {
1013 std::vector
<Rect
> rects
;
1016 rects
.push_back(Rect(ToViewPoint(Point(x
.GetMin(), 0)),
1017 Size(x
.length(), GetStringSize().height())));
1023 // Each line segment keeps its position in text coordinates. Traverse all line
1024 // segments and if the segment intersects with the given range, add the view
1025 // rect corresponding to the intersection to |rects|.
1026 for (size_t line
= 0; line
< lines_
.size(); ++line
) {
1028 const Vector2d offset
= GetLineOffset(line
);
1029 for (size_t i
= 0; i
< lines_
[line
].segments
.size(); ++i
) {
1030 const internal::LineSegment
* segment
= &lines_
[line
].segments
[i
];
1031 const Range intersection
= segment
->x_range
.Intersect(x
);
1032 if (!intersection
.is_empty()) {
1033 Rect
rect(line_x
+ intersection
.start() - segment
->x_range
.start(),
1034 0, intersection
.length(), lines_
[line
].size
.height());
1035 rects
.push_back(rect
+ offset
);
1037 line_x
+= segment
->x_range
.length();
1044 Vector2d
RenderText::GetAlignmentOffset(size_t line_number
) {
1045 // TODO(ckocagil): Enable |lines_| usage in other platforms.
1047 DCHECK_LT(line_number
, lines_
.size());
1050 if (horizontal_alignment_
!= ALIGN_LEFT
) {
1052 const int width
= lines_
[line_number
].size
.width() +
1053 (cursor_enabled_
? 1 : 0);
1055 const int width
= GetContentWidth();
1057 offset
.set_x(display_rect().width() - width
);
1058 if (horizontal_alignment_
== ALIGN_CENTER
)
1059 offset
.set_x(offset
.x() / 2);
1062 // Vertically center the text.
1064 const int text_height
= lines_
.back().preceding_heights
+
1065 lines_
.back().size
.height();
1066 offset
.set_y((display_rect_
.height() - text_height
) / 2);
1068 offset
.set_y(GetBaseline() - GetLayoutTextBaseline());
1074 void RenderText::ApplyFadeEffects(internal::SkiaTextRenderer
* renderer
) {
1075 const int width
= display_rect().width();
1076 if (multiline() || elide_behavior_
!= FADE_TAIL
|| GetContentWidth() <= width
)
1079 const int gradient_width
= CalculateFadeGradientWidth(font_list(), width
);
1080 if (gradient_width
== 0)
1083 Rect solid_part
= display_rect();
1086 if (horizontal_alignment_
!= ALIGN_LEFT
) {
1087 left_part
= solid_part
;
1088 left_part
.Inset(0, 0, solid_part
.width() - gradient_width
, 0);
1089 solid_part
.Inset(gradient_width
, 0, 0, 0);
1091 if (horizontal_alignment_
!= ALIGN_RIGHT
) {
1092 right_part
= solid_part
;
1093 right_part
.Inset(solid_part
.width() - gradient_width
, 0, 0, 0);
1094 solid_part
.Inset(0, 0, gradient_width
, 0);
1097 Rect text_rect
= display_rect();
1098 text_rect
.Inset(GetAlignmentOffset(0).x(), 0, 0, 0);
1100 // TODO(msw): Use the actual text colors corresponding to each faded part.
1101 skia::RefPtr
<SkShader
> shader
= CreateFadeShader(
1102 text_rect
, left_part
, right_part
, colors_
.breaks().front().second
);
1104 renderer
->SetShader(shader
.get(), display_rect());
1107 void RenderText::ApplyTextShadows(internal::SkiaTextRenderer
* renderer
) {
1108 skia::RefPtr
<SkDrawLooper
> looper
= CreateShadowDrawLooper(shadows_
);
1109 renderer
->SetDrawLooper(looper
.get());
1113 bool RenderText::RangeContainsCaret(const Range
& range
,
1115 LogicalCursorDirection caret_affinity
) {
1116 // NB: exploits unsigned wraparound (WG14/N1124 section 6.2.5 paragraph 9).
1117 size_t adjacent
= (caret_affinity
== CURSOR_BACKWARD
) ?
1118 caret_pos
- 1 : caret_pos
+ 1;
1119 return range
.Contains(Range(caret_pos
, adjacent
));
1122 void RenderText::MoveCursorTo(size_t position
, bool select
) {
1123 size_t cursor
= std::min(position
, text().length());
1124 if (IsValidCursorIndex(cursor
))
1125 SetSelectionModel(SelectionModel(
1126 Range(select
? selection().start() : cursor
, cursor
),
1127 (cursor
== 0) ? CURSOR_FORWARD
: CURSOR_BACKWARD
));
1130 void RenderText::UpdateLayoutText() {
1131 layout_text_
.clear();
1132 line_breaks_
.SetMax(0);
1135 size_t obscured_text_length
=
1136 static_cast<size_t>(UTF16IndexToOffset(text_
, 0, text_
.length()));
1137 layout_text_
.assign(obscured_text_length
, kPasswordReplacementChar
);
1139 if (obscured_reveal_index_
>= 0 &&
1140 obscured_reveal_index_
< static_cast<int>(text_
.length())) {
1141 // Gets the index range in |text_| to be revealed.
1142 size_t start
= obscured_reveal_index_
;
1143 U16_SET_CP_START(text_
.data(), 0, start
);
1145 UChar32 unused_char
;
1146 U16_NEXT(text_
.data(), end
, text_
.length(), unused_char
);
1148 // Gets the index in |layout_text_| to be replaced.
1149 const size_t cp_start
=
1150 static_cast<size_t>(UTF16IndexToOffset(text_
, 0, start
));
1151 if (layout_text_
.length() > cp_start
)
1152 layout_text_
.replace(cp_start
, 1, text_
.substr(start
, end
- start
));
1155 layout_text_
= text_
;
1158 const base::string16
& text
= layout_text_
;
1159 if (truncate_length_
> 0 && truncate_length_
< text
.length()) {
1160 // Truncate the text at a valid character break and append an ellipsis.
1161 icu::StringCharacterIterator
iter(text
.c_str());
1162 iter
.setIndex32(truncate_length_
- 1);
1163 layout_text_
.assign(text
.substr(0, iter
.getIndex()) + kEllipsisUTF16
);
1166 if (elide_behavior_
!= TRUNCATE
&& elide_behavior_
!= FADE_TAIL
&&
1167 display_rect_
.width() > 0 && !layout_text_
.empty() &&
1168 GetContentWidth() > display_rect_
.width()) {
1169 // This doesn't trim styles so ellipsis may get rendered as a different
1170 // style than the preceding text. See crbug.com/327850.
1171 layout_text_
.assign(ElideText(layout_text_
));
1177 // TODO(skanuj): Fix code duplication with ElideText in ui/gfx/text_elider.cc
1178 // See crbug.com/327846
1179 base::string16
RenderText::ElideText(const base::string16
& text
) {
1180 const bool insert_ellipsis
= (elide_behavior_
!= TRUNCATE
);
1181 // Create a RenderText copy with attributes that affect the rendering width.
1182 scoped_ptr
<RenderText
> render_text(CreateInstance());
1183 render_text
->SetFontList(font_list_
);
1184 render_text
->SetDirectionalityMode(directionality_mode_
);
1185 render_text
->SetCursorEnabled(cursor_enabled_
);
1187 render_text
->styles_
= styles_
;
1188 render_text
->colors_
= colors_
;
1189 render_text
->SetText(text
);
1190 const int current_text_pixel_width
= render_text
->GetContentWidth();
1192 const base::string16 ellipsis
= base::string16(kEllipsisUTF16
);
1193 const bool elide_in_middle
= false;
1194 const bool elide_at_beginning
= false;
1195 StringSlicer
slicer(text
, ellipsis
, elide_in_middle
, elide_at_beginning
);
1197 // Pango will return 0 width for absurdly long strings. Cut the string in
1198 // half and try again.
1199 // This is caused by an int overflow in Pango (specifically, in
1200 // pango_glyph_string_extents_range). It's actually more subtle than just
1201 // returning 0, since on super absurdly long strings, the int can wrap and
1202 // return positive numbers again. Detecting that is probably not worth it
1203 // (eliding way too much from a ridiculous string is probably still
1204 // ridiculous), but we should check other widths for bogus values as well.
1205 if (current_text_pixel_width
<= 0 && !text
.empty())
1206 return ElideText(slicer
.CutString(text
.length() / 2, insert_ellipsis
));
1208 if (current_text_pixel_width
<= display_rect_
.width())
1211 render_text
->SetText(base::string16());
1212 render_text
->SetText(ellipsis
);
1213 const int ellipsis_width
= render_text
->GetContentWidth();
1215 if (insert_ellipsis
&& (ellipsis_width
>= display_rect_
.width()))
1216 return base::string16();
1218 // Use binary search to compute the elided text.
1220 size_t hi
= text
.length() - 1;
1221 const base::i18n::TextDirection text_direction
= GetTextDirection();
1222 for (size_t guess
= (lo
+ hi
) / 2; lo
<= hi
; guess
= (lo
+ hi
) / 2) {
1223 // Restore styles and colors. They will be truncated to size by SetText.
1224 render_text
->styles_
= styles_
;
1225 render_text
->colors_
= colors_
;
1226 base::string16 new_text
= slicer
.CutString(guess
, false);
1227 render_text
->SetText(new_text
);
1229 // This has to be an additional step so that the ellipsis is rendered with
1230 // same style as trailing part of the text.
1231 if (insert_ellipsis
) {
1232 // When ellipsis follows text whose directionality is not the same as that
1233 // of the whole text, it will be rendered with the directionality of the
1234 // whole text. Since we want ellipsis to indicate continuation of the
1235 // preceding text, we force the directionality of ellipsis to be same as
1236 // the preceding text using LTR or RTL markers.
1237 base::i18n::TextDirection trailing_text_direction
=
1238 base::i18n::GetLastStrongCharacterDirection(new_text
);
1239 new_text
.append(ellipsis
);
1240 if (trailing_text_direction
!= text_direction
) {
1241 if (trailing_text_direction
== base::i18n::LEFT_TO_RIGHT
)
1242 new_text
+= base::i18n::kLeftToRightMark
;
1244 new_text
+= base::i18n::kRightToLeftMark
;
1246 render_text
->SetText(new_text
);
1249 // We check the width of the whole desired string at once to ensure we
1250 // handle kerning/ligatures/etc. correctly.
1251 const int guess_width
= render_text
->GetContentWidth();
1252 if (guess_width
== display_rect_
.width())
1254 if (guess_width
> display_rect_
.width()) {
1256 // Move back if we are on loop terminating condition, and guess is wider
1265 return render_text
->text();
1268 void RenderText::UpdateCachedBoundsAndOffset() {
1269 if (cached_bounds_and_offset_valid_
)
1272 // TODO(ckocagil): Add support for scrolling multiline text.
1274 // First, set the valid flag true to calculate the current cursor bounds using
1275 // the stale |display_offset_|. Applying |delta_offset| at the end of this
1276 // function will set |cursor_bounds_| and |display_offset_| to correct values.
1277 cached_bounds_and_offset_valid_
= true;
1278 if (cursor_enabled())
1279 cursor_bounds_
= GetCursorBounds(selection_model_
, insert_mode_
);
1281 // Update |display_offset_| to ensure the current cursor is visible.
1282 const int display_width
= display_rect_
.width();
1283 const int content_width
= GetContentWidth();
1286 if (content_width
<= display_width
|| !cursor_enabled()) {
1287 // Don't pan if the text fits in the display width or when the cursor is
1289 delta_x
= -display_offset_
.x();
1290 } else if (cursor_bounds_
.right() > display_rect_
.right()) {
1291 // TODO(xji): when the character overflow is a RTL character, currently, if
1292 // we pan cursor at the rightmost position, the entered RTL character is not
1293 // displayed. Should pan cursor to show the last logical characters.
1295 // Pan to show the cursor when it overflows to the right.
1296 delta_x
= display_rect_
.right() - cursor_bounds_
.right();
1297 } else if (cursor_bounds_
.x() < display_rect_
.x()) {
1298 // TODO(xji): have similar problem as above when overflow character is a
1301 // Pan to show the cursor when it overflows to the left.
1302 delta_x
= display_rect_
.x() - cursor_bounds_
.x();
1303 } else if (display_offset_
.x() != 0) {
1304 // Reduce the pan offset to show additional overflow text when the display
1306 const int negate_rtl
= horizontal_alignment_
== ALIGN_RIGHT
? -1 : 1;
1307 const int offset
= negate_rtl
* display_offset_
.x();
1308 if (display_width
> (content_width
+ offset
)) {
1309 delta_x
= negate_rtl
* (display_width
- (content_width
+ offset
));
1313 Vector2d
delta_offset(delta_x
, 0);
1314 display_offset_
+= delta_offset
;
1315 cursor_bounds_
+= delta_offset
;
1318 void RenderText::DrawSelection(Canvas
* canvas
) {
1319 const std::vector
<Rect
> sel
= GetSubstringBounds(selection());
1320 for (std::vector
<Rect
>::const_iterator i
= sel
.begin(); i
< sel
.end(); ++i
)
1321 canvas
->FillRect(*i
, selection_background_focused_color_
);