Move ash specific cursor code to CursorManager.

Main changes are as follows.
- Move the responsibility of managing cursors to ash::CursorManager from aura::RootWindowHostLinux.
- Set the same cursor to all root windows with CursorManager so that cursor is updated properly while dragging across displays
- Introduce CursorLoader class, which implements platform specific cursor loading.
- Add SetDeviceScaleFactor to CursorClient, which sets the device scale factor used for the cursor.

BUG=132862,144756


Review URL: https://chromiumcodereview.appspot.com/10919135

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@156109 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 123 insertions, 0 deletions

diff --git a/ash/wm/image_cursors.cc b/ash/wm/image_cursors.cc
new file mode 100644
index 0000000..b0ec3f5
--- /dev/null
+++ b/ash/wm/image_cursors.cc
@@ -0,0 +1,123 @@
+// Copyright (c) 2012 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 "ash/wm/image_cursors.h"
+
+#include "base/logging.h"
+#include "ui/base/cursor/cursor_loader.h"
+#include "ui/base/cursor/cursor.h"
+#include "ui/gfx/point.h"
+#include "grit/ui_resources.h"
+
+namespace {
+
+const int kAnimatedCursorFrameDelayMs = 25;
+
+struct HotPoint {
+  int x;
+  int y;
+};
+
+struct CursorData {
+  int id;
+  int resource_id;
+  HotPoint hot_1x;
+  HotPoint hot_2x;
+};
+
+// TODO(oshima): Remove this comment (http://crbug.com/141586).
+// The cursor's hot points are defined in chromeos cursor images at:
+// http://folder/kuscher/projects/Chrome_OS/Pointers/focuspoint
+const CursorData kImageCursors[] = {
+  {ui::kCursorNull, IDR_AURA_CURSOR_PTR, {4, 4}, {8, 9}},
+  {ui::kCursorPointer, IDR_AURA_CURSOR_PTR, {4, 4}, {8, 9}},
+  {ui::kCursorNoDrop, IDR_AURA_CURSOR_NO_DROP, {4, 4}, {8, 9}},
+  {ui::kCursorNotAllowed, IDR_AURA_CURSOR_NO_DROP, {4, 4}, {8, 9}},
+  {ui::kCursorCopy, IDR_AURA_CURSOR_COPY, {4, 4}, {8, 9}},
+  {ui::kCursorHand, IDR_AURA_CURSOR_HAND, {9, 4}, {19, 8}},
+  {ui::kCursorMove, IDR_AURA_CURSOR_MOVE, {11, 11}, {23, 23}},
+  {ui::kCursorNorthEastResize, IDR_AURA_CURSOR_NORTH_EAST_RESIZE,
+   {12, 11}, {25, 23}},
+  {ui::kCursorSouthWestResize, IDR_AURA_CURSOR_SOUTH_WEST_RESIZE,
+   {12, 11}, {25, 23}},
+  {ui::kCursorSouthEastResize, IDR_AURA_CURSOR_SOUTH_EAST_RESIZE,
+   {11, 11}, {24, 23}},
+  {ui::kCursorNorthWestResize, IDR_AURA_CURSOR_NORTH_WEST_RESIZE,
+   {11, 11}, {24, 23}},
+  {ui::kCursorNorthResize, IDR_AURA_CURSOR_NORTH_RESIZE, {11, 12}, {23, 23}},
+  {ui::kCursorSouthResize, IDR_AURA_CURSOR_SOUTH_RESIZE, {11, 12}, {23, 23}},
+  {ui::kCursorEastResize, IDR_AURA_CURSOR_EAST_RESIZE, {12, 11}, {25, 23}},
+  {ui::kCursorWestResize, IDR_AURA_CURSOR_WEST_RESIZE, {12, 11}, {25, 23}},
+  {ui::kCursorIBeam, IDR_AURA_CURSOR_IBEAM, {12, 12}, {24, 25}},
+  {ui::kCursorAlias, IDR_AURA_CURSOR_ALIAS, {8, 6}, {15, 11}},
+  {ui::kCursorCell, IDR_AURA_CURSOR_CELL, {11, 11}, {24, 23}},
+  {ui::kCursorContextMenu, IDR_AURA_CURSOR_CONTEXT_MENU, {4, 4}, {8, 9}},
+  {ui::kCursorCross, IDR_AURA_CURSOR_CROSSHAIR, {12, 12}, {25, 23}},
+  {ui::kCursorHelp, IDR_AURA_CURSOR_HELP, {4, 4}, {8, 9}},
+  {ui::kCursorVerticalText, IDR_AURA_CURSOR_XTERM_HORIZ, {12, 11}, {26, 23}},
+  {ui::kCursorZoomIn, IDR_AURA_CURSOR_ZOOM_IN, {10, 10}, {20, 20}},
+  {ui::kCursorZoomOut, IDR_AURA_CURSOR_ZOOM_OUT, {10, 10}, {20, 20}},
+  {ui::kCursorRowResize, IDR_AURA_CURSOR_ROW_RESIZE, {11, 12}, {23, 23}},
+  {ui::kCursorColumnResize, IDR_AURA_CURSOR_COL_RESIZE, {12, 11}, {25, 23}},
+  {ui::kCursorEastWestResize, IDR_AURA_CURSOR_EAST_WEST_RESIZE,
+   {12, 11}, {25, 23}},
+  {ui::kCursorNorthSouthResize, IDR_AURA_CURSOR_NORTH_SOUTH_RESIZE,
+   {11, 12}, {23, 23}},
+  {ui::kCursorNorthEastSouthWestResize,
+   IDR_AURA_CURSOR_NORTH_EAST_SOUTH_WEST_RESIZE, {12, 11}, {25, 23}},
+  {ui::kCursorNorthWestSouthEastResize,
+   IDR_AURA_CURSOR_NORTH_WEST_SOUTH_EAST_RESIZE, {11, 11}, {24, 23}},
+  {ui::kCursorGrab, IDR_AURA_CURSOR_GRAB, {8, 5}, {16, 10}},
+  {ui::kCursorGrabbing, IDR_AURA_CURSOR_GRABBING, {9, 9}, {18, 18}},
+};
+
+const CursorData kAnimatedCursors[] = {
+  {ui::kCursorWait, IDR_THROBBER, {7, 7}, {14, 14}},
+  {ui::kCursorProgress, IDR_THROBBER, {7, 7}, {14, 14}},
+};
+
+}  // namespace
+
+namespace ash {
+
+ImageCursors::ImageCursors()
+    : cursor_loader_(ui::CursorLoader::Create()) {
+}
+
+ImageCursors::~ImageCursors() {
+}
+
+float ImageCursors::GetDeviceScaleFactor() const {
+  return cursor_loader_->device_scale_factor();
+}
+
+void ImageCursors::SetDeviceScaleFactor(float device_scale_factor) {
+  if (GetDeviceScaleFactor() == device_scale_factor)
+    return;
+
+  cursor_loader_->UnloadAll();
+  cursor_loader_->set_device_scale_factor(device_scale_factor);
+
+  for (size_t i = 0; i < arraysize(kImageCursors); ++i) {
+    const HotPoint& hot = device_scale_factor == 1.0f ?
+        kImageCursors[i].hot_1x : kImageCursors[i].hot_2x;
+    cursor_loader_->LoadImageCursor(kImageCursors[i].id,
+                                    kImageCursors[i].resource_id,
+                                    gfx::Point(hot.x, hot.y));
+  }
+  for (size_t i = 0; i < arraysize(kAnimatedCursors); ++i) {
+    const HotPoint& hot = device_scale_factor == 1.0f ?
+        kAnimatedCursors[i].hot_1x : kAnimatedCursors[i].hot_2x;
+    cursor_loader_->LoadAnimatedCursor(kAnimatedCursors[i].id,
+                                       kAnimatedCursors[i].resource_id,
+                                       gfx::Point(hot.x, hot.y),
+                                       kAnimatedCursorFrameDelayMs);
+  }
+}
+
+void ImageCursors::SetPlatformCursor(gfx::NativeCursor* cursor) {
+  cursor_loader_->SetPlatformCursor(cursor);
+}
+
+}  // namespace ash