Implement double/triple click functionality in views textfield.

views/controls/textfield/native_textfield_views.cc

Index: views/controls/textfield/native_textfield_views.cc
diff --git a/views/controls/textfield/native_textfield_views.cc b/views/controls/textfield/native_textfield_views.cc
index 60589d229090235068af5680084ec849796437ec..7bbe8c2e9f91e50881df344d1278ba03152c93d8 100644
--- a/views/controls/textfield/native_textfield_views.cc
+++ b/views/controls/textfield/native_textfield_views.cc
@@ -59,7 +59,9 @@ NativeTextfieldViews::NativeTextfieldViews(Textfield* parent)
       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)),
+      tracking_triple_click_(false) {
   set_border(text_border_);
 
   // Multiline is not supported.
@@ -78,7 +80,7 @@ NativeTextfieldViews::~NativeTextfieldViews() {
 
 bool NativeTextfieldViews::OnMousePressed(const views::MouseEvent& e) {
   textfield_->RequestFocus();
-  if (e.IsLeftMouseButton()) {
+  if (e.IsLeftMouseButton() && !DetectAndHandleDoubleAndTripleClick(e)) {
     size_t pos = FindCursorPosition(e.location());
     if (model_->MoveCursorTo(pos, false)) {
       UpdateCursorBoundsAndTextOffset();
@@ -762,6 +764,27 @@ size_t NativeTextfieldViews::FindCursorPosition(const gfx::Point& point) const {
   return left_pos;
 }
 
+bool NativeTextfieldViews::DetectAndHandleDoubleAndTripleClick(
+    const views::MouseEvent& e) {
+  if (!e.IsOnlyLeftMouseButton())
+    return false;

[oshima, 2011/01/18 19:52:54]

1) mouse move (with some threshold) should cancel the double/triple clicks.
2) the 3rd click should be same as single click (cursor selection)

It'd be clearer if this returns the type of action to take, and the caller
invokes the methods on model, something like

switch (GetClickAction(event)) {
  case CursorSelect:
  case SelectWord:
  case SelectAll:
}

[varunjain, 2011/01/25 04:06:40]

Done.

+  base::TimeDelta elapsed_time = e.GetTimeStamp() - last_mouse_press_time_;
+  last_mouse_press_time_ = e.GetTimeStamp();
+  if (elapsed_time.InMilliseconds() <= GetDoubleClickTimeMS()) {
+    if (tracking_triple_click_) {
+      model_->SelectAll();
+    } else {
+      model_->SelectWord();
+    }
+    tracking_triple_click_ = !tracking_triple_click_;
+    SchedulePaint();
+    return true;
+  } else {
+    tracking_triple_click_ = false;
+  }
+  return false;
+}
+
 void NativeTextfieldViews::PropagateTextChange() {
   textfield_->SyncText();
   Textfield::Controller* controller = textfield_->GetController();