Revert 93840 - Add gfx::RenderText and support code.

RenderText is NativeTextFieldViews' interface to platform-specific text rendering engines.

This change doesn't hook in any new Pango or Uniscribe functionality, it will just setup the necessary API.

Review URL: http://codereview.chromium.org/7265011

TBR=msw@chromium.org
Review URL: http://codereview.chromium.org/7492041

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93842 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 224 deletions

diff --git a/ui/gfx/render_text.h b/ui/gfx/render_text.h
deleted file mode 100755
index bcc2175..0000000
--- a/ui/gfx/render_text.h
+++ /dev/null
@@ -1,224 +0,0 @@
-// Copyright (c) 2011 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_H_
-#define UI_GFX_RENDER_TEXT_H_
-#pragma once
-
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/i18n/rtl.h"
-#include "base/string16.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/base/range/range.h"
-#include "ui/gfx/font.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/point.h"
-
-namespace {
-
-// Strike line width.
-const int kStrikeWidth = 2;
-
-// Color settings for text, backgrounds and cursor.
-// These are tentative, and should be derived from theme, system
-// settings and current settings.
-// TODO(oshima): Change this to match the standard chrome
-// before dogfooding textfield views.
-const SkColor kSelectedTextColor = SK_ColorWHITE;
-const SkColor kFocusedSelectionColor = SK_ColorCYAN;
-const SkColor kUnfocusedSelectionColor = SK_ColorLTGRAY;
-const SkColor kCursorColor = SK_ColorBLACK;
-
-}  // namespace
-
-namespace gfx {
-
-class Canvas;
-class RenderTextTest;
-
-// A visual style applicable to a range of text.
-struct StyleRange {
-  StyleRange();
-
-  Font font;
-  SkColor foreground;
-  bool strike;
-  bool underline;
-  ui::Range range;
-};
-
-typedef std::vector<StyleRange> StyleRanges;
-
-// TODO(msw): Distinguish between logical character and glyph?
-enum BreakType {
-  CHARACTER_BREAK,
-  WORD_BREAK,
-  LINE_BREAK,
-};
-
-// TODO(msw): Implement RenderText[Win|Linux] for Uniscribe/Pango BiDi...
-
-// RenderText represents an abstract model of styled text and its corresponding
-// visual layout. Support is built in for a cursor, a selection, simple styling,
-// complex scripts, and bi-directional text. Implementations provide mechanisms
-// for rendering and translation between logical and visual data.
-class RenderText {
-
- public:
-  virtual ~RenderText();
-
-  // Creates a platform-specific RenderText instance.
-  static RenderText* CreateRenderText();
-
-  const string16& text() const { return text_; }
-  virtual void SetText(const string16& text);
-
-  bool cursor_visible() const { return cursor_visible_; }
-  void set_cursor_visible(bool visible) { cursor_visible_ = visible; }
-
-  bool insert_mode() const { return insert_mode_; }
-  void toggle_insert_mode() { insert_mode_ = !insert_mode_; }
-
-  bool focused() const { return focused_; }
-  void set_focused(bool focused) { focused_ = focused; }
-
-  const StyleRange& default_style() const { return default_style_; }
-  void set_default_style(StyleRange style) { default_style_ = style; }
-
-  const gfx::Rect& display_rect() const { return display_rect_; }
-  void set_display_rect(const gfx::Rect& r) { display_rect_ = r; }
-
-  size_t GetCursorPosition() const;
-  void SetCursorPosition(const size_t position);
-
-  // Moves the cursor left or right. Cursor movement is visual, meaning that
-  // left and right are relative to screen, not the directionality of the text.
-  // If |select| is false, the selection range is emptied at the new position.
-  // If |break_type| is CHARACTER_BREAK, move to the neighboring character.
-  // If |break_type| is WORD_BREAK, move to the nearest word boundary.
-  // If |break_type| is LINE_BREAK, move to text edge as shown on screen.
-  void MoveCursorLeft(BreakType break_type, bool select);
-  void MoveCursorRight(BreakType break_type, bool select);
-
-  // Moves the cursor to the specified logical |position|.
-  // If |select| is false, the selection range is emptied at the new position.
-  // Returns true if the cursor position or selection range changed.
-  bool MoveCursorTo(size_t position, bool select);
-
-  // Move the cursor to the position associated with the clicked point.
-  // If |select| is false, the selection range is emptied at the new position.
-  bool MoveCursorTo(const gfx::Point& point, bool select);
-
-  const ui::Range& GetSelection() const;
-  void SetSelection(const ui::Range& range);
-
-  // Returns true if the local point is over selected text.
-  bool IsPointInSelection(const gfx::Point& point) const;
-
-  // Selects no text, all text, or the word at the current cursor position.
-  void ClearSelection();
-  void SelectAll();
-  void SelectWord();
-
-  const ui::Range& GetCompositionRange() const;
-  void SetCompositionRange(const ui::Range& composition_range);
-
-  // Apply |style_range| to the internal style model.
-  virtual void ApplyStyleRange(StyleRange style_range);
-
-  // Apply |default_style_| over the entire text range.
-  virtual void ApplyDefaultStyle();
-
-  base::i18n::TextDirection GetTextDirection() const;
-
-  // Get the width of the entire string.
-  int GetStringWidth() const;
-
-  virtual void Draw(gfx::Canvas* canvas);
-
-  // TODO(msw): Deprecate this function. Logical and visual cursors are not
-  //  mapped one-to-one. See the selection_range_ TODO for more information.
-  // Get the logical cursor position from a visual point in local coordinates.
-  virtual size_t FindCursorPosition(const gfx::Point& point) const;
-
-  // Get the visual bounds containing the logical substring within |range|.
-  // These bounds could be visually discontiguous if the logical selection range
-  // is split by an odd number of LTR/RTL level change.
-  virtual std::vector<gfx::Rect> GetSubstringBounds(
-      const ui::Range& range) const;
-
-  // Get the visual bounds describing the cursor at |position|. These bounds
-  // typically represent a vertical line, but if |insert_mode| is true they
-  // contain the bounds of the associated glyph.
-  virtual gfx::Rect GetCursorBounds(size_t position, bool insert_mode) const;
-
- protected:
-  RenderText();
-
-  const StyleRanges& style_ranges() const { return style_ranges_; }
-
-  const gfx::Point& display_offset() const { return display_offset_; }
-
-  // Get the cursor position that visually neighbors |position|.
-  // If |move_by_word| is true, return the neighboring word delimiter position.
-  virtual size_t GetLeftCursorPosition(size_t position,
-                                       bool move_by_word) const;
-  virtual size_t GetRightCursorPosition(size_t position,
-                                        bool move_by_word) const;
-
- private:
-  friend class RenderTextTest;
-
-  FRIEND_TEST_ALL_PREFIXES(RenderTextTest, DefaultStyle);
-  FRIEND_TEST_ALL_PREFIXES(RenderTextTest, CustomDefaultStyle);
-  FRIEND_TEST_ALL_PREFIXES(RenderTextTest, ApplyStyleRange);
-  FRIEND_TEST_ALL_PREFIXES(RenderTextTest, StyleRangesAdjust);
-
-  // Clear out |style_ranges_|.
-  void ClearStyleRanges();
-
-  bool IsPositionAtWordSelectionBoundary(size_t pos);
-
-  // Logical UTF-16 string data to be drawn.
-  string16 text_;
-
-  // TODO(msw): A single logical cursor position doesn't support two potential
-  //  visual cursor positions. For example, clicking right of 'c' & 'D' yeilds:
-  //  (visually: 'abc|FEDghi' and 'abcFED|ghi', both logically: 'abc|DEFghi').
-  //  Similarly, one visual position may have two associated logical positions.
-  //  For example, clicking the right side of 'D' and left side of 'g' yields:
-  //  (both visually: 'abcFED|ghi', logically: 'abc|DEFghi' and 'abcDEF|ghi').
-  //  Update the cursor model with a leading/trailing flag, a level association,
-  //  or a disjoint visual position to satisfy the proposed visual behavior.
-  // Logical selection range; the range end is also the logical cursor position.
-  ui::Range selection_range_;
-
-  // The cursor visibility and insert mode.
-  bool cursor_visible_;
-  bool insert_mode_;
-
-  // The focus state of the text.
-  bool focused_;
-
-  // Composition text range.
-  ui::Range composition_range_;
-
-  // List of style ranges. Elements in the list never overlap each other.
-  StyleRanges style_ranges_;
-  // The default text style.
-  StyleRange default_style_;
-
-  // The local display area for rendering the text.
-  gfx::Rect display_rect_;
-  // The offset for the text to be drawn, relative to the display area.
-  gfx::Point display_offset_;
-
-  DISALLOW_COPY_AND_ASSIGN(RenderText);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_RENDER_TEXT_H_