New accessibility virtual keyboard behavior in non-sticky mode.

ui/wm/core/ime_util.cc

Index: ui/wm/core/ime_util.cc
diff --git a/ui/wm/core/ime_util.cc b/ui/wm/core/ime_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ae6297a62b8779d80c518721c2ece737a3219913
--- /dev/null
+++ b/ui/wm/core/ime_util.cc
@@ -0,0 +1,102 @@
+// Copyright 2017 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 "ui/wm/core/ime_util.h"
+
+#include "base/command_line.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/base/ui_base_switches.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/wm/core/coordinate_conversion.h"
+
+namespace wm {
+namespace {
+
+#if defined(OS_CHROMEOS)

[sky, 2017/04/26 15:24:36]

It seems that all this code is chromeos specific. Can it move to a chromeos
specific location?

[oshima, 2017/04/26 18:03:42]

These are used in content/browser and ui/views. They do not depend on
ui/chromeos/ and want to keep them that way.

How about keeping interface here and inject using delegate?  (the impl should
probably be in ash as its a part of wm)

[sky, 2017/04/26 19:58:17]

I'm ok with them living here, but how about making file ime_util_chromeos and
only compile on chromeos?

+// Moves the window to ensure caret not in rect.
+// Returns whether the window is actually moved or not.
+// This function has to be in ifdef to prevent unused function error.
+bool MoveWindowToEnsureCaretNotInRect(aura::Window* window,
+                                      const gfx::Rect& rect_in_screen) {
+  gfx::Rect original_window_bounds = window->GetBoundsInScreen();
+  // Calculate vertial window shift
+  gfx::Rect rect_in_root_window = rect_in_screen;
+  ::wm::ConvertRectFromScreen(window->GetRootWindow(), &rect_in_root_window);
+  gfx::Rect bounds_in_root_window = window->GetBoundsInRootWindow();
+  const int top_y =
+      std::max(rect_in_root_window.y() - bounds_in_root_window.height(), 0);
+
+  // No need to move up the window
+  if (top_y >= bounds_in_root_window.y())
+    return false;
+
+  // Set restore bounds and move the window.
+  window->SetProperty(kVirtualKeyboardRestoreBoundsKey,
+                      new gfx::Rect(original_window_bounds));
+
+  gfx::Rect new_bounds_in_root_window = bounds_in_root_window;
+  new_bounds_in_root_window.set_y(top_y);
+  window->SetBounds(new_bounds_in_root_window);
+  return true;
+}
+#endif  // defined(OS_CHROMEOS)
+
+}  // namespace
+
+DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(gfx::Rect,
+                                   kVirtualKeyboardRestoreBoundsKey,
+                                   nullptr);
+
+void RestoreWindowBoundsOnClientFocusLost(aura::Window* window) {
+#if defined(OS_CHROMEOS)
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          ::switches::kUseNewVirtualKeyboardBehavior))
+    return;
+
+  // Get restore bounds of the window
+  gfx::Rect* vk_restore_bounds =
+      window->GetProperty(kVirtualKeyboardRestoreBoundsKey);
+
+  if (vk_restore_bounds) {
+    // Restore the window bounds
+    // TODO(yhanada): Don't move the window if a user has moved it while the
+    // keyboard is shown.
+    if (window->GetBoundsInScreen() != *vk_restore_bounds) {
+      gfx::Rect original_bounds = *vk_restore_bounds;
+      ::wm::ConvertRectFromScreen(window->GetRootWindow(), &original_bounds);
+      window->SetBounds(original_bounds);
+    }
+    window->ClearProperty(wm::kVirtualKeyboardRestoreBoundsKey);
+  }
+#endif  // defined(OS_CHROMEOS)
+}
+
+void EnsureWindowNotInRect(aura::Window* window,
+                           const gfx::Rect& rect_in_screen) {
+#if defined(OS_CHROMEOS)
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          ::switches::kUseNewVirtualKeyboardBehavior))
+    return;
+
+  gfx::Rect original_window_bounds = window->GetBoundsInScreen();
+  if (window->GetProperty(wm::kVirtualKeyboardRestoreBoundsKey)) {
+    original_window_bounds =
+        *window->GetProperty(wm::kVirtualKeyboardRestoreBoundsKey);
+  }
+
+  gfx::Rect hidden_window_bounds_in_screen =
+      gfx::IntersectRects(rect_in_screen, original_window_bounds);
+  if (hidden_window_bounds_in_screen.IsEmpty()) {
+    // The window isn't covered by the keyboard, restore the window position if
+    // necessary.
+    RestoreWindowBoundsOnClientFocusLost(window);
+    return;
+  }
+
+  if (!MoveWindowToEnsureCaretNotInRect(window, rect_in_screen))
+    RestoreWindowBoundsOnClientFocusLost(window);
+#endif  // defined(OS_CHROMEOS)
+}
+
+}  // namespace wm