Move webcursors code from webkit/ to content.

webkit/common/cursors/webcursor.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 "webkit/common/cursors/webcursor.h"
-
-#include "base/logging.h"
-#include "base/pickle.h"
-#include "third_party/WebKit/public/platform/WebImage.h"
-
-using blink::WebCursorInfo;
-
-static const int kMaxCursorDimension = 1024;
-
-WebCursor::WebCursor()
-    : type_(WebCursorInfo::TypePointer),
-      custom_scale_(1) {
-#if defined(OS_WIN)
-  external_cursor_ = NULL;
-#endif
-  InitPlatformData();
-}
-
-WebCursor::WebCursor(const CursorInfo& cursor_info)
-    : type_(WebCursorInfo::TypePointer) {
-#if defined(OS_WIN)
-  external_cursor_ = NULL;
-#endif
-  InitPlatformData();
-  InitFromCursorInfo(cursor_info);
-}
-
-WebCursor::~WebCursor() {
-  Clear();
-}
-
-WebCursor::WebCursor(const WebCursor& other) {
-  InitPlatformData();
-  Copy(other);
-}
-
-const WebCursor& WebCursor::operator=(const WebCursor& other) {
-  if (this == &other)
-    return *this;
-
-  Clear();
-  Copy(other);
-  return *this;
-}
-
-void WebCursor::InitFromCursorInfo(const CursorInfo& cursor_info) {
-  Clear();
-
-#if defined(OS_WIN)
-  if (cursor_info.external_handle) {
-    InitFromExternalCursor(cursor_info.external_handle);
-    return;
-  }
-#endif
-
-  type_ = cursor_info.type;
-  hotspot_ = cursor_info.hotspot;
-  if (IsCustom())
-    SetCustomData(cursor_info.custom_image);
-  custom_scale_ = cursor_info.image_scale_factor;
-  CHECK(custom_scale_ > 0);
-  ClampHotspot();
-}
-
-void WebCursor::GetCursorInfo(CursorInfo* cursor_info) const {
-  cursor_info->type = static_cast<WebCursorInfo::Type>(type_);
-  cursor_info->hotspot = hotspot_;
-  ImageFromCustomData(&cursor_info->custom_image);
-  cursor_info->image_scale_factor = custom_scale_;
-
-#if defined(OS_WIN)
-  cursor_info->external_handle = external_cursor_;
-#endif
-}
-
-bool WebCursor::Deserialize(PickleIterator* iter) {
-  int type, hotspot_x, hotspot_y, size_x, size_y, data_len;
-  float scale;
-  const char* data;
-
-  // Leave |this| unmodified unless we are going to return success.
-  if (!iter->ReadInt(&type) ||
-      !iter->ReadInt(&hotspot_x) ||
-      !iter->ReadInt(&hotspot_y) ||
-      !iter->ReadLength(&size_x) ||
-      !iter->ReadLength(&size_y) ||
-      !iter->ReadFloat(&scale) ||
-      !iter->ReadData(&data, &data_len))
-    return false;
-
-  // Ensure the size is sane, and there is enough data.
-  if (size_x > kMaxCursorDimension ||
-      size_y > kMaxCursorDimension)
-    return false;
-
-  // Ensure scale isn't ridiculous, and the scaled image size is still sane.
-  if (scale < 0.01 || scale > 100 ||
-      size_x / scale > kMaxCursorDimension ||
-      size_y / scale > kMaxCursorDimension)
-    return false;
-
-  type_ = type;
-
-  if (type == WebCursorInfo::TypeCustom) {
-    if (size_x > 0 && size_y > 0) {
-      // The * 4 is because the expected format is an array of RGBA pixel
-      // values.
-      if (size_x * size_y * 4 > data_len)
-        return false;
-
-      hotspot_.set_x(hotspot_x);
-      hotspot_.set_y(hotspot_y);
-      custom_size_.set_width(size_x);
-      custom_size_.set_height(size_y);
-      custom_scale_ = scale;
-      ClampHotspot();
-
-      custom_data_.clear();
-      if (data_len > 0) {
-        custom_data_.resize(data_len);
-        memcpy(&custom_data_[0], data, data_len);
-      }
-    }
-  }
-  return DeserializePlatformData(iter);
-}
-
-bool WebCursor::Serialize(Pickle* pickle) const {
-  if (!pickle->WriteInt(type_) ||
-      !pickle->WriteInt(hotspot_.x()) ||
-      !pickle->WriteInt(hotspot_.y()) ||
-      !pickle->WriteInt(custom_size_.width()) ||
-      !pickle->WriteInt(custom_size_.height()) ||
-      !pickle->WriteFloat(custom_scale_))
-    return false;
-
-  const char* data = NULL;
-  if (!custom_data_.empty())
-    data = &custom_data_[0];
-  if (!pickle->WriteData(data, custom_data_.size()))
-    return false;
-
-  return SerializePlatformData(pickle);
-}
-
-bool WebCursor::IsCustom() const {
-  return type_ == WebCursorInfo::TypeCustom;
-}
-
-bool WebCursor::IsEqual(const WebCursor& other) const {
-  if (type_ != other.type_)
-    return false;
-
-  if (!IsPlatformDataEqual(other))
-    return false;
-
-  return hotspot_ == other.hotspot_ &&
-         custom_size_ == other.custom_size_ &&
-         custom_scale_ == other.custom_scale_ &&
-         custom_data_ == other.custom_data_;
-}
-
-#if defined(OS_WIN)
-
-static WebCursorInfo::Type ToCursorType(HCURSOR cursor) {
-  static struct {
-    HCURSOR cursor;
-    WebCursorInfo::Type type;
-  } kStandardCursors[] = {
-    { LoadCursor(NULL, IDC_ARROW),       WebCursorInfo::TypePointer },
-    { LoadCursor(NULL, IDC_CROSS),       WebCursorInfo::TypeCross },
-    { LoadCursor(NULL, IDC_HAND),        WebCursorInfo::TypeHand },
-    { LoadCursor(NULL, IDC_IBEAM),       WebCursorInfo::TypeIBeam },
-    { LoadCursor(NULL, IDC_WAIT),        WebCursorInfo::TypeWait },
-    { LoadCursor(NULL, IDC_HELP),        WebCursorInfo::TypeHelp },
-    { LoadCursor(NULL, IDC_SIZENESW),    WebCursorInfo::TypeNorthEastResize },
-    { LoadCursor(NULL, IDC_SIZENWSE),    WebCursorInfo::TypeNorthWestResize },
-    { LoadCursor(NULL, IDC_SIZENS),      WebCursorInfo::TypeNorthSouthResize },
-    { LoadCursor(NULL, IDC_SIZEWE),      WebCursorInfo::TypeEastWestResize },
-    { LoadCursor(NULL, IDC_SIZEALL),     WebCursorInfo::TypeMove },
-    { LoadCursor(NULL, IDC_APPSTARTING), WebCursorInfo::TypeProgress },
-    { LoadCursor(NULL, IDC_NO),          WebCursorInfo::TypeNotAllowed },
-  };
-  for (int i = 0; i < arraysize(kStandardCursors); ++i) {
-    if (cursor == kStandardCursors[i].cursor)
-      return kStandardCursors[i].type;
-  }
-  return WebCursorInfo::TypeCustom;
-}
-
-void WebCursor::InitFromExternalCursor(HCURSOR cursor) {
-  WebCursorInfo::Type cursor_type = ToCursorType(cursor);
-
-  InitFromCursorInfo(CursorInfo(cursor_type));
-
-  if (cursor_type == WebCursorInfo::TypeCustom)
-    external_cursor_ = cursor;
-}
-
-#endif  // defined(OS_WIN)
-
-void WebCursor::Clear() {
-  type_ = WebCursorInfo::TypePointer;
-  hotspot_.set_x(0);
-  hotspot_.set_y(0);
-  custom_size_.set_width(0);
-  custom_size_.set_height(0);
-  custom_scale_ = 1;
-  custom_data_.clear();
-  CleanupPlatformData();
-}
-
-void WebCursor::Copy(const WebCursor& other) {
-  type_ = other.type_;
-  hotspot_ = other.hotspot_;
-  custom_size_ = other.custom_size_;
-  custom_scale_ = other.custom_scale_;
-  custom_data_ = other.custom_data_;
-  CopyPlatformData(other);
-}
-
-void WebCursor::SetCustomData(const SkBitmap& bitmap) {
-  if (bitmap.empty())
-    return;
-
-  // Fill custom_data_ directly with the NativeImage pixels.
-  SkAutoLockPixels bitmap_lock(bitmap);
-  custom_data_.resize(bitmap.getSize());
-  if (!custom_data_.empty())
-    memcpy(&custom_data_[0], bitmap.getPixels(), bitmap.getSize());
-  custom_size_.set_width(bitmap.width());
-  custom_size_.set_height(bitmap.height());
-}
-
-void WebCursor::ImageFromCustomData(SkBitmap* image) const {
-  if (custom_data_.empty())
-    return;
-
-  image->setConfig(SkBitmap::kARGB_8888_Config,
-                   custom_size_.width(),
-                   custom_size_.height());
-  if (!image->allocPixels())
-    return;
-  memcpy(image->getPixels(), &custom_data_[0], custom_data_.size());
-}
-
-void WebCursor::ClampHotspot() {
-  if (!IsCustom())
-    return;
-
-  // Clamp the hotspot to the custom image's dimensions.
-  hotspot_.set_x(std::max(0,
-                          std::min(custom_size_.width() - 1, hotspot_.x())));
-  hotspot_.set_y(std::max(0,
-                          std::min(custom_size_.height() - 1, hotspot_.y())));
-}