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 SizeF GetStringSizeF() 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 int GetLayoutTextBaseline() OVERRIDE; 37 virtual SelectionModel AdjacentCharSelectionModel( 38 const SelectionModel& selection, 39 VisualCursorDirection direction) OVERRIDE; 40 virtual SelectionModel AdjacentWordSelectionModel( 41 const SelectionModel& selection, 42 VisualCursorDirection direction) OVERRIDE; 43 virtual Range GetGlyphBounds(size_t index) OVERRIDE; 44 virtual std::vector<Rect> GetSubstringBounds(const Range& range) OVERRIDE; 45 virtual size_t TextIndexToLayoutIndex(size_t index) const OVERRIDE; 46 virtual size_t LayoutIndexToTextIndex(size_t index) const OVERRIDE; 47 virtual bool IsValidCursorIndex(size_t index) OVERRIDE; 48 virtual void ResetLayout() OVERRIDE; 49 virtual void EnsureLayout() OVERRIDE; 50 virtual void DrawVisualText(Canvas* canvas) OVERRIDE; 51 52 private: 53 struct TextRun { 54 CTRunRef ct_run; 55 SkPoint origin; 56 std::vector<uint16> glyphs; 57 std::vector<SkPoint> glyph_positions; 58 SkScalar width; 59 std::string font_name; 60 int font_style; 61 SkScalar text_size; 62 SkColor foreground; 63 bool underline; 64 bool strike; 65 bool diagonal_strike; 66 67 TextRun(); 68 ~TextRun(); 69 }; 70 71 // Applies RenderText styles to |attr_string| with the given |ct_font|. 72 void ApplyStyles(CFMutableAttributedStringRef attr_string, CTFontRef ct_font); 73 74 // Updates |runs_| based on |line_| and sets |runs_valid_| to true. 75 void ComputeRuns(); 76 77 // The Core Text line of text. Created by |EnsureLayout()|. 78 base::ScopedCFTypeRef<CTLineRef> line_; 79 80 // Array to hold CFAttributedString attributes that allows Core Text to hold 81 // weak references to them without leaking. 82 base::ScopedCFTypeRef<CFMutableArrayRef> attributes_; 83 84 // Visual dimensions of the text. Computed by |EnsureLayout()|. 85 SizeF string_size_; 86 87 // Common baseline for this line of text. Computed by |EnsureLayout()|. 88 SkScalar common_baseline_; 89 90 // Visual text runs. Only valid if |runs_valid_| is true. Computed by 91 // |ComputeRuns()|. 92 std::vector<TextRun> runs_; 93 94 // Indicates that |runs_| are valid, set by |ComputeRuns()|. 95 bool runs_valid_; 96 97 DISALLOW_COPY_AND_ASSIGN(RenderTextMac); 98 }; 99 100 } // namespace gfx 101 102 #endif // UI_GFX_RENDER_TEXT_MAC_H_ 103