Implement double/triple click functionality in views textfield.

views/controls/textfield/native_textfield_views.cc

 // 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.
 
 #include "views/controls/textfield/native_textfield_views.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 41 matching lines @@
 const char NativeTextfieldViews::kViewClassName[] =
     "views/NativeTextfieldViews";
 
 NativeTextfieldViews::NativeTextfieldViews(Textfield* parent)
     : textfield_(parent),
       model_(new TextfieldViewsModel()),
       text_border_(new TextfieldBorder()),
       text_offset_(0),
       insert_(true),
       is_cursor_visible_(false),
-      ALLOW_THIS_IN_INITIALIZER_LIST(cursor_timer_(this)) {
+      ALLOW_THIS_IN_INITIALIZER_LIST(cursor_timer_(this)),
+      last_mouse_press_time_(base::Time::FromInternalValue(0)),
+      click_state_(NONE) {
   set_border(text_border_);
 
   // Multiline is not supported.
   DCHECK_NE(parent->style(), Textfield::STYLE_MULTILINE);
   // Lowercase is not supported.
   DCHECK_NE(parent->style(), Textfield::STYLE_LOWERCASE);
 
   SetContextMenuController(this);
 }
 
 NativeTextfieldViews::~NativeTextfieldViews() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTextfieldViews, View overrides:
 
 bool NativeTextfieldViews::OnMousePressed(const views::MouseEvent& e) {
-  textfield_->RequestFocus();
-  if (e.IsLeftMouseButton()) {
-    size_t pos = FindCursorPosition(e.location());
-    if (model_->MoveCursorTo(pos, false)) {
-      UpdateCursorBoundsAndTextOffset();
-      SchedulePaint();
-    }
-  }
+  if (HandleMousePressed(e))
+    SchedulePaint();
   return true;
 }
 
 bool NativeTextfieldViews::OnMouseDragged(const views::MouseEvent& e) {
   size_t pos = FindCursorPosition(e.location());
   if (model_->MoveCursorTo(pos, true)) {
     UpdateCursorBoundsAndTextOffset();
     SchedulePaint();
   }
   return true;
@@ skipping 679 matching lines @@
     } else if (pivot == x) {
       return pivot_pos;
     } else {
       right = pivot;
       right_pos = pivot_pos;
     }
   }
   return left_pos;
 }
 
+bool NativeTextfieldViews::HandleMousePressed(const views::MouseEvent& e) {
+  textfield_->RequestFocus();
+  base::TimeDelta time_delta = e.GetTimeStamp() - last_mouse_press_time_;
+  gfx::Point location_delta = e.location().Subtract(last_mouse_press_location_);
+  last_mouse_press_time_ = e.GetTimeStamp();
+  last_mouse_press_location_ = e.location();
+  if (e.IsLeftMouseButton()) {
+    if (!ExceededDragThreshold(location_delta.x(), location_delta.y())
+      && time_delta.InMilliseconds() <= GetDoubleClickTimeMS()) {
+      // Multiple mouse press detected. Check for double or triple.
+      switch (click_state_) {
+        case TRACKING_DOUBLE_CLICK:
+          click_state_ = TRACKING_TRIPLE_CLICK;
+          model_->SelectWord();
+          return true;
+        case TRACKING_TRIPLE_CLICK:
+          click_state_ = NONE;
+          model_->SelectAll();
+          return true;
+        case NONE:
+          click_state_ = TRACKING_DOUBLE_CLICK;
+          SetCursorForMouseClick(e);
+          return true;
+      }
+    } else {
+      // Single mouse press.
+      click_state_ = TRACKING_DOUBLE_CLICK;
+      SetCursorForMouseClick(e);
+      return true;
+    }
+  }
+  return false;
+}
+
+void NativeTextfieldViews::SetCursorForMouseClick(const views::MouseEvent& e) {
+  size_t pos = FindCursorPosition(e.location());
+  if (model_->MoveCursorTo(pos, false)) {
+    UpdateCursorBoundsAndTextOffset();
+  }
+}
+
 void NativeTextfieldViews::PropagateTextChange() {
   textfield_->SyncText();
   Textfield::Controller* controller = textfield_->GetController();
   if (controller)
     controller->ContentsChanged(textfield_, GetText());
 }
 
 void NativeTextfieldViews::InitContextMenuIfRequired() {
   if (context_menu_menu_.get())
     return;
@@ skipping 56 matching lines @@
 }
 
 void NativeTextfieldViews::TextfieldBorder::SetInsets(int top,
                                                       int left,
                                                       int bottom,
                                                       int right) {
   insets_.Set(top, left, bottom, right);
 }
 
 }  // namespace views