aura-x11: Add custom web cursor support.

ui/base/cursor/cursor.h

+// 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.
+
+#ifndef UI_BASE_CURSOR_CURSOR_H_
+#define UI_BASE_CURSOR_CURSOR_H_
+#pragma once
+
+#include "build/build_config.h"
+#include "ui/base/ui_export.h"
+
+namespace gfx {
+class Point;
+class Size;
+}
+
+#if defined(OS_WIN)
+typedef struct HINSTANCE__* HINSTANCE;
+typedef struct HICON__* HICON;
+typedef HICON HCURSOR;
+#endif
+
+namespace ui {
+
+#if defined(OS_WIN)
+typedef ::HCURSOR PlatformCursor;
+#elif defined(USE_X11)
+typedef unsigned long PlatformCursor;
+#else
+typedef void* PlatformCursor;
+#endif
+
+// TODO(jamescook): Once we're on C++0x we could change these constants
+// to an enum and forward declare it in native_widget_types.h.
+
+// Equivalent to a NULL HCURSOR on Windows.
+const int kCursorNull = 0;
+
+// These cursors mirror WebKit cursors from WebCursorInfo, but are replicated
+// here so we don't introduce a WebKit dependency.
+const int kCursorPointer = 1;
+const int kCursorCross = 2;
+const int kCursorHand = 3;
+const int kCursorIBeam = 4;
+const int kCursorWait = 5;
+const int kCursorHelp = 6;
+const int kCursorEastResize = 7;
+const int kCursorNorthResize = 8;
+const int kCursorNorthEastResize = 9;
+const int kCursorNorthWestResize = 10;
+const int kCursorSouthResize = 11;
+const int kCursorSouthEastResize = 12;
+const int kCursorSouthWestResize = 13;
+const int kCursorWestResize = 14;
+const int kCursorNorthSouthResize = 15;
+const int kCursorEastWestResize = 16;
+const int kCursorNorthEastSouthWestResize = 17;
+const int kCursorNorthWestSouthEastResize = 18;
+const int kCursorColumnResize = 19;
+const int kCursorRowResize = 20;
+const int kCursorMiddlePanning = 21;
+const int kCursorEastPanning = 22;
+const int kCursorNorthPanning = 23;
+const int kCursorNorthEastPanning = 24;
+const int kCursorNorthWestPanning = 25;
+const int kCursorSouthPanning = 26;
+const int kCursorSouthEastPanning = 27;
+const int kCursorSouthWestPanning = 28;
+const int kCursorWestPanning = 29;
+const int kCursorMove = 30;
+const int kCursorVerticalText = 31;
+const int kCursorCell = 32;
+const int kCursorContextMenu = 33;
+const int kCursorAlias = 34;
+const int kCursorProgress = 35;
+const int kCursorNoDrop = 36;
+const int kCursorCopy = 37;
+const int kCursorNone = 38;
+const int kCursorNotAllowed = 39;
+const int kCursorZoomIn = 40;
+const int kCursorZoomOut = 41;
+const int kCursorGrab = 42;
+const int kCursorGrabbing = 43;
+const int kCursorCustom = 44;
+
+// Ref-counted cursor that supports both default and custom cursors.
+class UI_EXPORT Cursor {
+ public:
+  Cursor()
+      : native_type_(0),
+        platform_cursor_(0) {
+  }
+
+  // Implicit constructor.
+  Cursor(int type)
+      : native_type_(type),
+        platform_cursor_(0) {
+  }
+
+  // Allow copy.
+  Cursor(const Cursor& cursor)
+      : native_type_(cursor.native_type_),
+        platform_cursor_(cursor.platform_cursor_) {
+    if (native_type_ == kCursorCustom)
+      RefCustomCursor();
+  }
+
+  ~Cursor() {
+    if (native_type_ == kCursorCustom)
+      UnrefCustomCursor();
+  }
+
+  void SetPlatformCursor(const PlatformCursor& platform) {
+    if (platform_cursor_)
+      UnrefCustomCursor();
+    native_type_ = kCursorCustom;
+    platform_cursor_ = platform;
+    RefCustomCursor();
+  }
+
+  void RefCustomCursor();
+  void UnrefCustomCursor();
+
+  int native_type() const { return native_type_; }
+  PlatformCursor platform() const { return platform_cursor_; }
+
+  bool operator==(int type) const { return native_type_ == type; }
+  bool operator==(const Cursor& cursor) const {
+    return native_type_ == cursor.native_type_ &&
+           platform_cursor_ == cursor.platform_cursor_;
+  }
+  bool operator!=(int type) const { return native_type_ != type; }
+  bool operator!=(const Cursor& cursor) const {
+    return native_type_ != cursor.native_type_ ||
+           platform_cursor_ != cursor.platform_cursor_;
+  }
+
+ private:
+  // See definitions above.
+  int native_type_;
+
+  PlatformCursor platform_cursor_;
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_CURSOR_CURSOR_H_