Move ash specific cursor code to CursorManager.

ui/base/cursor/cursor_loader_x11.cc

+// 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 "ui/base/cursor/cursor_loader_x11.h"
+
+#include <X11/Xlib.h>
+#include <X11/cursorfont.h>
+
+#include "base/logging.h"
+#include "grit/ui_resources.h"
+#include "ui/base/cursor/cursor.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/base/x/x11_util.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace {
+
+const int kAnimatedCursorFrameDelayMs = 25;

[Daniel Erat, 2012/09/06 23:47:15]

This seems like it should be a parameter to LoadAnimatedCursor().

[mazda, 2012/09/07 02:20:57]

Done.

+
+// Returns X font cursor shape from an Aura cursor.
+int CursorShapeFromNative(gfx::NativeCursor native_cursor) {
+  switch (native_cursor.native_type()) {
+    case ui::kCursorMiddlePanning:
+      return XC_fleur;
+    case ui::kCursorEastPanning:
+      return XC_sb_right_arrow;
+    case ui::kCursorNorthPanning:
+      return XC_sb_up_arrow;
+    case ui::kCursorNorthEastPanning:
+      return XC_top_right_corner;
+    case ui::kCursorNorthWestPanning:
+      return XC_top_left_corner;
+    case ui::kCursorSouthPanning:
+      return XC_sb_down_arrow;
+    case ui::kCursorSouthEastPanning:
+      return XC_bottom_right_corner;
+    case ui::kCursorSouthWestPanning:
+      return XC_bottom_left_corner;
+    case ui::kCursorWestPanning:
+      return XC_sb_left_arrow;
+    case ui::kCursorNone:
+    case ui::kCursorGrab:
+    case ui::kCursorGrabbing:
+      // TODO(jamescook): Need cursors for these.  crbug.com/111650
+      return XC_left_ptr;
+
+    case ui::kCursorNull:
+    case ui::kCursorPointer:
+    case ui::kCursorNoDrop:
+    case ui::kCursorNotAllowed:
+    case ui::kCursorCopy:
+    case ui::kCursorMove:
+    case ui::kCursorEastResize:
+    case ui::kCursorNorthResize:
+    case ui::kCursorSouthResize:
+    case ui::kCursorWestResize:
+    case ui::kCursorNorthEastResize:
+    case ui::kCursorNorthWestResize:
+    case ui::kCursorSouthWestResize:
+    case ui::kCursorSouthEastResize:
+    case ui::kCursorIBeam:
+    case ui::kCursorAlias:
+    case ui::kCursorCell:
+    case ui::kCursorContextMenu:
+    case ui::kCursorCross:
+    case ui::kCursorHelp:
+    case ui::kCursorWait:
+    case ui::kCursorNorthSouthResize:
+    case ui::kCursorEastWestResize:
+    case ui::kCursorNorthEastSouthWestResize:
+    case ui::kCursorNorthWestSouthEastResize:
+    case ui::kCursorProgress:
+    case ui::kCursorColumnResize:
+    case ui::kCursorRowResize:
+    case ui::kCursorVerticalText:
+    case ui::kCursorZoomIn:
+    case ui::kCursorZoomOut:
+      NOTREACHED() << "Cursor (" << native_cursor.native_type() << ") should "
+                   << "have an image asset.";
+      return XC_left_ptr;
+    case ui::kCursorCustom:
+      NOTREACHED();
+      return XC_left_ptr;
+  }
+  NOTREACHED();
+  return XC_left_ptr;
+}
+
+}  // namespace
+
+namespace ui {
+
+CursorLoader* CursorLoader::Create() {
+  return new CursorLoaderX11;
+}
+
+CursorLoaderX11::CursorLoaderX11()
+    : invisible_cursor_(0U) {
+  Display* xdisplay = ui::GetXDisplay();
+  // Initialize invisible cursor.
+  char nodata[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+  XColor black;
+  black.red = black.green = black.blue = 0;
+  Pixmap blank = XCreateBitmapFromData(xdisplay, DefaultRootWindow(xdisplay),
+                                       nodata, 8, 8);
+  invisible_cursor_ = XCreatePixmapCursor(xdisplay, blank, blank,
+                                          &black, &black, 0, 0);
+  XFreePixmap(xdisplay, blank);
+}
+
+CursorLoaderX11::~CursorLoaderX11() {
+  UnloadAll();
+  // Clears XCursorCache.
+  ui::GetXCursor(ui::kCursorClearXCursorCache);
+
+  XFreeCursor(ui::GetXDisplay(), invisible_cursor_);
+}
+
+void CursorLoaderX11::LoadImageCursor(
+    int id, int resource_id, int hot_x, int hot_y) {
+  const gfx::ImageSkia* image =
+      ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
+  const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(
+      ui::GetScaleFactorFromScale(device_scale_factor()));
+  gfx::Point hot(hot_x * device_scale_factor(), hot_y * device_scale_factor());
+  XcursorImage* x_image =
+      ui::SkBitmapToXcursorImage(&image_rep.sk_bitmap(), hot);
+  cursors_[id] = ui::CreateReffedCustomXCursor(x_image);
+  // |bitmap| is owned by the resource bundle. So we do not need to free it.
+}
+
+// Creates an animated X Cursor from an image resource and puts it in the
+// cursor map. The image is assumed to be a concatenation of animation frames.
+// Also, each frame is assumed to be square (width == height)
+void CursorLoaderX11::LoadAnimatedCursor(
+    int id, int resource_id, int hot_x, int hot_y) {
+  const gfx::ImageSkia* image =
+      ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
+  const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(
+      ui::GetScaleFactorFromScale(device_scale_factor()));
+  const SkBitmap bitmap = image_rep.sk_bitmap();
+  DCHECK_EQ(bitmap.config(), SkBitmap::kARGB_8888_Config);
+  int frame_width = bitmap.height();
+  int frame_height = frame_width;
+  int total_width = bitmap.width();
+  DCHECK_EQ(total_width % frame_width, 0);
+  int frame_count = total_width / frame_width;
+  DCHECK_GT(frame_count, 0);
+  XcursorImages* x_images = XcursorImagesCreate(frame_count);
+  x_images->nimage = frame_count;
+  bitmap.lockPixels();
+  unsigned int* pixels = bitmap.getAddr32(0, 0);
+  // Create each frame.
+  for (int i = 0; i < frame_count; ++i) {
+    XcursorImage* x_image = XcursorImageCreate(frame_width, frame_height);
+    for (int j = 0; j < frame_height; ++j) {
+      // Copy j'th row of i'th frame.
+      memcpy(x_image->pixels + j * frame_width,
+             pixels + i * frame_width + j * total_width,
+             frame_width * 4);
+    }
+    x_image->xhot = hot_x * device_scale_factor();
+    x_image->yhot = hot_y * device_scale_factor();
+    x_image->delay = kAnimatedCursorFrameDelayMs;
+    x_images->images[i] = x_image;
+  }
+  bitmap.unlockPixels();
+
+  animated_cursors_[id] = std::make_pair(
+      XcursorImagesLoadCursor(ui::GetXDisplay(), x_images), x_images);
+  // |bitmap| is owned by the resource bundle. So we do not need to free it.
+}
+
+void CursorLoaderX11::UnloadAll() {
+  for (ImageCursorMap::const_iterator it = cursors_.begin();
+       it != cursors_.end(); ++it)
+    ui::UnrefCustomXCursor(it->second);
+
+  // Free animated cursors and images.
+  for (AnimatedCursorMap::iterator it = animated_cursors_.begin();
+       it != animated_cursors_.end(); ++it) {
+    XcursorImagesDestroy(it->second.second);  // also frees individual frames.
+    XFreeCursor(ui::GetXDisplay(), it->second.first);
+  }
+}
+
+void CursorLoaderX11::SetPlatformCursor(gfx::NativeCursor* cursor) {
+  DCHECK(cursor);
+
+  ::Cursor xcursor;
+  if (IsImageCursor(*cursor))
+    xcursor = ImageCursorFromNative(*cursor);
+  else if (*cursor == ui::kCursorNone)
+    xcursor =  invisible_cursor_;

[Daniel Erat, 2012/09/06 23:47:15]

nit: delete extra space after '='

[mazda, 2012/09/07 02:20:57]

Done.

+  else if (*cursor == ui::kCursorCustom)
+    xcursor = cursor->platform();
+  else if (device_scale_factor() == 1.0f)
+    xcursor = ui::GetXCursor(CursorShapeFromNative(*cursor));
+  else
+    xcursor = ImageCursorFromNative(ui::kCursorPointer);
+
+  cursor->SetPlatformCursor(xcursor);
+}
+
+void CursorLoaderX11::HideHostCursor() {
+  XDefineCursor(ui::GetXDisplay(), DefaultRootWindow(ui::GetXDisplay()),
+                invisible_cursor_);
+}
+
+bool CursorLoaderX11::IsImageCursor(gfx::NativeCursor native_cursor) {
+  int type = native_cursor.native_type();
+  return cursors_.find(type) != cursors_.end() ||
+      animated_cursors_.find(type) != animated_cursors_.end();
+}
+
+::Cursor CursorLoaderX11::ImageCursorFromNative(
+    gfx::NativeCursor native_cursor) {
+  int type = native_cursor.native_type();
+  if (animated_cursors_.find(type) != animated_cursors_.end())

[Daniel Erat, 2012/09/06 23:47:15]

nit: if you're not going to do anything with the iterator here, it's shorter to
just do:

  if (animated_cursors_.count(type))

[mazda, 2012/09/07 02:20:57]

Done.

+    return animated_cursors_[type].first;
+  DCHECK(cursors_.find(type) != cursors_.end());
+  return cursors_[type];
+}
+
+}