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// Copyright (c) 2006-2008 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/glue/webcursor.h"
#include "base/logging.h"
#include "base/pickle.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCursorInfo.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebImage.h"
using WebKit::WebCursorInfo;
using WebKit::WebImage;
static const int kMaxCursorDimension = 1024;
WebCursor::WebCursor()
: type_(WebCursorInfo::TypePointer) {
InitPlatformData();
}
WebCursor::WebCursor(const WebCursorInfo& cursor_info)
: type_(WebCursorInfo::TypePointer) {
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 WebCursorInfo& cursor_info) {
Clear();
#if defined(OS_WIN)
if (cursor_info.externalHandle) {
InitFromExternalCursor(cursor_info.externalHandle);
return;
}
#endif
type_ = cursor_info.type;
hotspot_ = cursor_info.hotSpot;
if (IsCustom())
SetCustomData(cursor_info.customImage);
ClampHotspot();
}
void WebCursor::GetCursorInfo(WebCursorInfo* cursor_info) const {
cursor_info->type = static_cast<WebCursorInfo::Type>(type_);
cursor_info->hotSpot = hotspot_;
ImageFromCustomData(&cursor_info->customImage);
#if defined(OS_WIN)
cursor_info->externalHandle = external_cursor_;
#endif
}
bool WebCursor::Deserialize(const Pickle* pickle, void** iter) {
int type, hotspot_x, hotspot_y, size_x, size_y, data_len;
const char* data;
// Leave |this| unmodified unless we are going to return success.
if (!pickle->ReadInt(iter, &type) ||
!pickle->ReadInt(iter, &hotspot_x) ||
!pickle->ReadInt(iter, &hotspot_y) ||
!pickle->ReadLength(iter, &size_x) ||
!pickle->ReadLength(iter, &size_y) ||
!pickle->ReadData(iter, &data, &data_len))
return false;
// Ensure the size is sane, and there is enough data.
if (size_x > kMaxCursorDimension ||
size_y > 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);
ClampHotspot();
custom_data_.clear();
if (data_len > 0) {
custom_data_.resize(data_len);
memcpy(&custom_data_[0], data, data_len);
}
}
}
return DeserializePlatformData(pickle, 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()))
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_data_ == other.custom_data_;
}
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_data_.clear();
CleanupPlatformData();
}
void WebCursor::Copy(const WebCursor& other) {
type_ = other.type_;
hotspot_ = other.hotspot_;
custom_size_ = other.custom_size_;
custom_data_ = other.custom_data_;
CopyPlatformData(other);
}
#if WEBKIT_USING_SKIA
// The WEBKIT_USING_CG implementation is in webcursor_mac.mm.
void WebCursor::SetCustomData(const WebImage& image) {
if (image.isNull())
return;
// Fill custom_data_ directly with the NativeImage pixels.
const SkBitmap& bitmap = image.getSkBitmap();
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(WebImage* image) const {
if (custom_data_.empty())
return;
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config,
custom_size_.width(),
custom_size_.height());
if (!bitmap.allocPixels())
return;
memcpy(bitmap.getPixels(), &custom_data_[0], custom_data_.size());
image->assign(bitmap);
}
#endif
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())));
}
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