views: support vertical-drag-to-end on textfields

ui/views/controls/textfield/textfield_unittest.cc

Index: ui/views/controls/textfield/textfield_unittest.cc
diff --git a/ui/views/controls/textfield/textfield_unittest.cc b/ui/views/controls/textfield/textfield_unittest.cc
index 97595c57cb4e5b61a1c8569801d43f7724a0607d..d06aabde111557200a0ce61d739181c97e2a3186 100644
--- a/ui/views/controls/textfield/textfield_unittest.cc
+++ b/ui/views/controls/textfield/textfield_unittest.cc
@@ -39,6 +39,7 @@
 #include "ui/views/controls/textfield/textfield_model.h"
 #include "ui/views/controls/textfield/textfield_test_api.h"
 #include "ui/views/focus/focus_manager.h"
+#include "ui/views/style/platform_style.h"
 #include "ui/views/test/test_views_delegate.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/test/widget_test.h"
@@ -1195,6 +1196,53 @@ TEST_F(TextfieldTest, DragToSelect) {
   EXPECT_EQ(textfield_->text(), textfield_->GetSelectedText());
 }
 
+// This test checks that dragging above the textfield selects to the beginning
+// and dragging below the textfield selects to the end, but only on platforms
+// where that is the expected behavior.
+TEST_F(TextfieldTest, DragUpOrDownSelectsToEnd) {
+  InitTextfield();
+  textfield_->SetText(ASCIIToUTF16("hello world"));
+  const base::string16 expected_up =
+      base::ASCIIToUTF16(PlatformStyle::kTextfieldDragVerticallyDragsToEnd ?
+                         "hello" : "lo");
+  const base::string16 expected_down =
+      base::ASCIIToUTF16(PlatformStyle::kTextfieldDragVerticallyDragsToEnd ?
+                         " world" : " w");
+  const int kStartX = GetCursorPositionX(5);
+  const int kDownX = GetCursorPositionX(7);
+  const int kUpX = GetCursorPositionX(3);
+  gfx::Point start_point(kStartX, 0);
+  gfx::Point down_point(kDownX, 500);
+  gfx::Point up_point(kUpX, -500);
+
+  ui::MouseEvent click_start(ui::ET_MOUSE_PRESSED, start_point, start_point,
+                             ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
+                             ui::EF_LEFT_MOUSE_BUTTON);
+  ui::MouseEvent click_down(ui::ET_MOUSE_PRESSED, down_point, down_point,
+                            ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
+                            ui::EF_LEFT_MOUSE_BUTTON);
+  ui::MouseEvent drag_up(ui::ET_MOUSE_DRAGGED, up_point, up_point,
+                           ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON, 0);
+  ui::MouseEvent drag_down(ui::ET_MOUSE_DRAGGED, down_point, down_point,
+                           ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON, 0);
+  ui::MouseEvent release_up(ui::ET_MOUSE_RELEASED, up_point, up_point,
+                           ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
+                           ui::EF_LEFT_MOUSE_BUTTON);
+  ui::MouseEvent release_down(ui::ET_MOUSE_RELEASED, down_point, down_point,
+                              ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
+                              ui::EF_LEFT_MOUSE_BUTTON);
+
+  textfield_->OnMousePressed(click_start);
+  textfield_->OnMouseDragged(drag_up);
+  textfield_->OnMouseReleased(release_up);
+  EXPECT_EQ(textfield_->GetSelectedText(), expected_up);
+
+  textfield_->OnMousePressed(click_start);
+  textfield_->OnMouseDragged(drag_down);
+  textfield_->OnMouseReleased(release_down);
+  EXPECT_EQ(textfield_->GetSelectedText(), expected_down);
+}
+
 #if defined(OS_WIN)
 TEST_F(TextfieldTest, DragAndDrop_AcceptDrop) {
   InitTextfield();