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. 4 5 #ifndef UI_GFX_RENDER_TEXT_MAC_H_ 6 #define UI_GFX_RENDER_TEXT_MAC_H_ 7 8 #include <ApplicationServices/ApplicationServices.h> 9 10 #include <string> 11 #include <vector> 12 13 #include "base/mac/scoped_cftyperef.h" 14 #include "ui/gfx/render_text.h" 15 16 namespace gfx { 17 18 // RenderTextMac is the Mac implementation of RenderText that uses CoreText for 19 // layout and Skia for drawing. 20 // 21 // Note: The current implementation only supports drawing and sizing the text, 22 // but not text selection or cursor movement. 23 class RenderTextMac : public RenderText { 24 public: 25 RenderTextMac(); 26 virtual ~RenderTextMac(); 27 28 // Overridden from RenderText: 29 virtual Size GetStringSize() OVERRIDE; 30 virtual int GetBaseline() OVERRIDE; 31 virtual SelectionModel FindCursorPosition(const Point& point) OVERRIDE; 32 virtual std::vector<FontSpan> GetFontSpansForTesting() OVERRIDE; 33 34 protected: 35 // Overridden from RenderText: 36 virtual SelectionModel AdjacentCharSelectionModel( 37 const SelectionModel& selection, 38 VisualCursorDirection direction) OVERRIDE; 39 virtual SelectionModel AdjacentWordSelectionModel( 40 const SelectionModel& selection, 41 VisualCursorDirection direction) OVERRIDE; 42 virtual ui::Range GetGlyphBounds(size_t index) OVERRIDE; 43 virtual std::vector<Rect> GetSubstringBounds(const ui::Range& range) OVERRIDE; 44 virtual size_t TextIndexToLayoutIndex(size_t index) const OVERRIDE; 45 virtual size_t LayoutIndexToTextIndex(size_t index) const OVERRIDE; 46 virtual bool IsCursorablePosition(size_t position) OVERRIDE; 47 virtual void ResetLayout() OVERRIDE; 48 virtual void EnsureLayout() OVERRIDE; 49 virtual void DrawVisualText(Canvas* canvas) OVERRIDE; 50 51 private: 52 struct TextRun { 53 CTRunRef ct_run; 54 SkPoint origin; 55 std::vector<uint16> glyphs; 56 std::vector<SkPoint> glyph_positions; 57 SkScalar width; 58 std::string font_name; 59 int font_style; 60 SkScalar text_size; 61 SkColor foreground; 62 bool underline; 63 bool strike; 64 bool diagonal_strike; 65 66 TextRun(); 67 ~TextRun(); 68 }; 69 70 // Applies RenderText styles to |attr_string| with the given |ct_font|. 71 void ApplyStyles(CFMutableAttributedStringRef attr_string, CTFontRef ct_font); 72 73 // Updates |runs_| based on |line_| and sets |runs_valid_| to true. 74 void ComputeRuns(); 75 76 // The Core Text line of text. Created by |EnsureLayout()|. 77 base::ScopedCFTypeRef<CTLineRef> line_; 78 79 // Array to hold CFAttributedString attributes that allows Core Text to hold 80 // weak references to them without leaking. 81 base::ScopedCFTypeRef<CFMutableArrayRef> attributes_; 82 83 // Visual dimensions of the text. Computed by |EnsureLayout()|. 84 Size string_size_; 85 86 // Common baseline for this line of text. Computed by |EnsureLayout()|. 87 SkScalar common_baseline_; 88 89 // Visual text runs. Only valid if |runs_valid_| is true. Computed by 90 // |ComputeRuns()|. 91 std::vector<TextRun> runs_; 92 93 // Indicates that |runs_| are valid, set by |ComputeRuns()|. 94 bool runs_valid_; 95 96 DISALLOW_COPY_AND_ASSIGN(RenderTextMac); 97 }; 98 99 } // namespace gfx 100 101 #endif // UI_GFX_RENDER_TEXT_MAC_H_ 102
