ozone: Allow building for ozone without depending on pango

ui/gfx/render_text_linux.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef UI_GFX_RENDER_TEXT_LINUX_H_
-#define UI_GFX_RENDER_TEXT_LINUX_H_
-
-#include <pango/pango.h>
-#include <vector>
-
-#include "ui/gfx/render_text.h"
-
-namespace gfx {
-
-// RenderTextLinux is the Linux implementation of RenderText using Pango.
-class RenderTextLinux : public RenderText {
- public:
-  RenderTextLinux();
-  virtual ~RenderTextLinux();
-
-  // Overridden from RenderText:
-  virtual Size GetStringSize() OVERRIDE;
-  virtual SelectionModel FindCursorPosition(const Point& point) OVERRIDE;
-  virtual std::vector<FontSpan> GetFontSpansForTesting() OVERRIDE;
-
- protected:
-  // Overridden from RenderText:
-  virtual int GetLayoutTextBaseline() OVERRIDE;
-  virtual SelectionModel AdjacentCharSelectionModel(
-      const SelectionModel& selection,
-      VisualCursorDirection direction) OVERRIDE;
-  virtual SelectionModel AdjacentWordSelectionModel(
-      const SelectionModel& selection,
-      VisualCursorDirection direction) OVERRIDE;
-  virtual Range GetGlyphBounds(size_t index) OVERRIDE;
-  virtual std::vector<Rect> GetSubstringBounds(const Range& range) OVERRIDE;
-  virtual size_t TextIndexToLayoutIndex(size_t index) const OVERRIDE;
-  virtual size_t LayoutIndexToTextIndex(size_t index) const OVERRIDE;
-  virtual bool IsCursorablePosition(size_t position) OVERRIDE;
-  virtual void ResetLayout() OVERRIDE;
-  virtual void EnsureLayout() OVERRIDE;
-  virtual void DrawVisualText(Canvas* canvas) OVERRIDE;
-
- private:
-  friend class RenderTextTest;
-  FRIEND_TEST_ALL_PREFIXES(RenderTextTest, PangoAttributes);
-
-  // Returns the run that contains the character attached to the caret in the
-  // given selection model. Return NULL if not found.
-  GSList* GetRunContainingCaret(const SelectionModel& caret) const;
-
-  // Given a |run|, returns the SelectionModel that contains the logical first
-  // or last caret position inside (not at a boundary of) the run.
-  // The returned value represents a cursor/caret position without a selection.
-  SelectionModel FirstSelectionModelInsideRun(const PangoItem* run);
-  SelectionModel LastSelectionModelInsideRun(const PangoItem* run);
-
-  // Setup pango attribute: foreground, background, font, strike.
-  void SetupPangoAttributes(PangoLayout* layout);
-
-  // Append one pango attribute |pango_attr| into pango attribute list |attrs|.
-  void AppendPangoAttribute(size_t start,
-                            size_t end,
-                            PangoAttribute* pango_attr,
-                            PangoAttrList* attrs);
-
-  // Get the text index corresponding to the |run|'s |glyph_index|.
-  size_t GetGlyphTextIndex(PangoLayoutRun* run, int glyph_index) const;
-
-  // Pango Layout.
-  PangoLayout* layout_;
-  // A single line layout resulting from laying out via |layout_|.
-  PangoLayoutLine* current_line_;
-
-  // Information about character attributes.
-  PangoLogAttr* log_attrs_;
-  // Number of attributes in |log_attrs_|.
-  int num_log_attrs_;
-
-  // The text in the |layout_|.
-  const char* layout_text_;
-
-  DISALLOW_COPY_AND_ASSIGN(RenderTextLinux);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_RENDER_TEXT_LINUX_H_