no native implementation of Textfield.

This is based on the original CL http://codereview.chromium.org/3142008.
The key difference is
* This uses Textfield framework and NativeTextfieldView implements NativeTextfieldWrapper.
  This allows us to swap the implementation without recompling the tree and can start
  testing on bots.
* Changed the name of the model to TextfieldViewModel as TextfieldModel may be confusing
  as other Textfield implementations are not using it. I also changed to use string16 instead
  of gap buffer as it's enough for single line text. We can update the model to use GapBuffer when necessary.
* Changed to use string16 as that's what chrome codebase should use.
* Added a switch to turn on TextfieldView.

I also filled a couple of features such as:
  * selection by key
  * mouse actions (move cursor, selection)
  * used WordIterator, which is i18n compatible, to move cursor by word
  * blinking cursor

This is only for linux based build due to KeyStroke difference.

I'm going to move some of test utlity function in chrome/browser/automation/ui_controls to app/test
and will add more test once the migration is done.

BUG=none
TEST=new unit tests are added : NativeTestfieldViewTest and TextfieldViewModelTest.

Review URL: http://codereview.chromium.org/5857002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69523 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 172 insertions, 0 deletions

diff --git a/views/controls/textfield/native_textfield_views.h b/views/controls/textfield/native_textfield_views.h
new file mode 100644
index 0000000..cfb47be
--- /dev/null
+++ b/views/controls/textfield/native_textfield_views.h
@@ -0,0 +1,172 @@
+// Copyright (c) 2010 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 VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
+#define VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
+#pragma once
+
+#include "base/string16.h"
+#include "base/task.h"
+#include "gfx/font.h"
+#include "views/border.h"
+#include "views/controls/textfield/native_textfield_wrapper.h"
+#include "views/view.h"
+
+namespace gfx {
+class Canvas;
+}  // namespace
+
+namespace views {
+
+class KeyEvent;
+class TextfieldViewsModel;
+
+// A views/skia only implementation of NativeTextfieldWrapper.
+// No platform specific code is used.
+// Following features are not yet supported.
+// * BIDI
+// * Clipboard  (Cut & Paste).
+// * Context Menu.
+// * IME/i18n support.
+// * X selection (only if we want to support).
+// * STYLE_MULTILINE, STYLE_LOWERCASE text. (These are not used in
+//   chromeos, so we may not need them)
+// * Double click to select word, and triple click to select all.
+class NativeTextfieldViews : public views::View,
+                             public NativeTextfieldWrapper {
+ public:
+  explicit NativeTextfieldViews(Textfield* parent);
+  ~NativeTextfieldViews();
+
+  // views::View overrides:
+  virtual bool OnMousePressed(const views::MouseEvent& e);
+  virtual bool OnMouseDragged(const views::MouseEvent& e);
+  virtual void OnMouseReleased(const views::MouseEvent& e, bool canceled);
+  virtual bool OnKeyPressed(const views::KeyEvent& e);
+  virtual bool OnKeyReleased(const views::KeyEvent& e);
+  virtual void Paint(gfx::Canvas* canvas);
+  virtual void WillGainFocus();
+  virtual void DidGainFocus();
+  virtual void WillLoseFocus();
+  virtual void DidChangeBounds(const gfx::Rect& previous,
+                               const gfx::Rect& current);
+
+  // NativeTextfieldWrapper overrides:
+  virtual string16 GetText() const;
+  virtual void UpdateText();
+  virtual void AppendText(const string16& text);
+  virtual string16 GetSelectedText() const;
+  virtual void SelectAll();
+  virtual void ClearSelection();
+  virtual void UpdateBorder();
+  virtual void UpdateTextColor();
+  virtual void UpdateBackgroundColor();
+  virtual void UpdateReadOnly();
+  virtual void UpdateFont();
+  virtual void UpdateIsPassword();
+  virtual void UpdateEnabled();
+  virtual bool IsPassword();
+  virtual gfx::Insets CalculateInsets();
+  virtual void UpdateHorizontalMargins();
+  virtual void UpdateVerticalMargins();
+  virtual void SetFocus();
+  virtual View* GetView();
+  virtual gfx::NativeView GetTestingHandle() const;
+  virtual bool IsIMEComposing() const;
+
+  // class name of internal
+  static const char kViewClassName[];
+
+  // Returns true when
+  // 1) built with GYP_DEFIENS="touchui=1"
+  // 2) enabled by SetEnableTextfieldViews(true)
+  // 3) enabled by the command line flag "--enable-textfield-view".
+  static bool IsTextfieldViewsEnabled();
+  // Enable/Disable TextfieldViews implementation for Textfield.
+  static void SetEnableTextfieldViews(bool enabled);
+
+ private:
+  friend class NativeTextfieldViewsTest;
+
+  // A Border class to draw focus border for the text field.
+  class TextfieldBorder : public Border {
+   public:
+    TextfieldBorder();
+
+    // Border implementation.
+    virtual void Paint(const View& view, gfx::Canvas* canvas) const;
+    virtual void GetInsets(gfx::Insets* insets) const;
+
+    // Sets the insets of the border.
+    void SetInsets(int top, int left, int bottom, int right);
+
+    // Sets the focus state.
+    void set_has_focus(bool has_focus) {
+      has_focus_ = has_focus;
+    }
+
+   private:
+    bool has_focus_;
+    gfx::Insets insets_;
+
+    DISALLOW_COPY_AND_ASSIGN(TextfieldBorder);
+  };
+
+  // Returns the Textfield's font.
+  const gfx::Font& GetFont() const;
+
+  // Returns the Textfield's text color.
+  SkColor GetTextColor() const;
+
+  // A callback function to periodically update the cursor state.
+  void UpdateCursor();
+
+  // Repaint the cursor.
+  void RepaintCursor();
+
+  // Update the cursor_bounds and text_offset.
+  void UpdateCursorBoundsAndTextOffset();
+
+  void PaintTextAndCursor(gfx::Canvas* canvas);
+
+  // Handle the keyevent.
+  bool HandleKeyEvent(const KeyEvent& key_event);
+
+  // Utility function. Gets the character corresponding to a keyevent.
+  // Returns 0 if the character is not printable.
+  char16 GetPrintableChar(const KeyEvent& key_event);
+
+  // Find a cusor position for given |point| in this views coordinates.
+  size_t FindCursorPosition(const gfx::Point& point) const;
+
+  // The parent textfield, the owner of this object.
+  Textfield* textfield_;
+
+  // The text model.
+  scoped_ptr<TextfieldViewsModel> model_;
+
+  // The reference to the border class. The object is owned by View::border_.
+  TextfieldBorder* text_border_;
+
+  // The x offset for the text to be drawn, without insets;
+  int text_offset_;
+
+  // Cursor's bounds in the textfield's coordinates.
+  gfx::Rect cursor_bounds_;
+
+  // True if the textfield is in insert mode.
+  bool insert_;
+
+  // The drawing state of cursor. True to draw.
+  bool is_cursor_visible_;
+
+  // A runnable method factory for callback to update the cursor.
+  ScopedRunnableMethodFactory<NativeTextfieldViews> cursor_timer_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeTextfieldViews);
+};
+
+}  // namespace views
+
+#endif  // VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_