cef/tests/cefclient/browser/image_cache.cc

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// Copyright (c) 2017 The Chromium Embedded Framework 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 "tests/cefclient/browser/image_cache.h"
#include <algorithm>
#include "tests/shared/browser/file_util.h"
#include "tests/shared/browser/resource_util.h"
#include "tests/shared/common/string_util.h"
namespace client {
namespace {
const char kEmptyId[] = "__empty";
} // namespace
ImageCache::ImageCache() = default;
ImageCache::~ImageCache() {
CEF_REQUIRE_UI_THREAD();
}
ImageCache::ImageRep::ImageRep(const std::string& path, float scale_factor)
: path_(path), scale_factor_(scale_factor) {
DCHECK(!path_.empty());
DCHECK_GT(scale_factor_, 0.0f);
}
ImageCache::ImageInfo::ImageInfo(const std::string& id,
const ImageRepSet& reps,
bool internal,
bool force_reload)
: id_(id), reps_(reps), internal_(internal), force_reload_(force_reload) {
#ifndef NDEBUG
DCHECK(!id_.empty());
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if (id_ != kEmptyId) {
DCHECK(!reps_.empty());
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}
#endif
}
// static
ImageCache::ImageInfo ImageCache::ImageInfo::Empty() {
return ImageInfo(kEmptyId, ImageRepSet(), true, false);
}
// static
ImageCache::ImageInfo ImageCache::ImageInfo::Create1x(
const std::string& id,
const std::string& path_1x,
bool internal) {
ImageRepSet reps;
reps.emplace_back(path_1x, 1.0f);
return ImageInfo(id, reps, internal, false);
}
// static
ImageCache::ImageInfo ImageCache::ImageInfo::Create2x(
const std::string& id,
const std::string& path_1x,
const std::string& path_2x,
bool internal) {
ImageRepSet reps;
reps.emplace_back(path_1x, 1.0f);
reps.emplace_back(path_2x, 2.0f);
return ImageInfo(id, reps, internal, false);
}
// static
ImageCache::ImageInfo ImageCache::ImageInfo::Create2x(const std::string& id) {
return Create2x(id, id + ".1x.png", id + ".2x.png", true);
}
struct ImageCache::ImageContent {
ImageContent() = default;
struct RepContent {
RepContent(ImageType type, float scale_factor, const std::string& contents)
: type_(type), scale_factor_(scale_factor), contents_(contents) {}
ImageType type_;
float scale_factor_;
std::string contents_;
};
typedef std::vector<RepContent> RepContentSet;
RepContentSet contents_;
CefRefPtr<CefImage> image_;
};
void ImageCache::LoadImages(const ImageInfoSet& image_info,
LoadImagesCallback callback) {
DCHECK(!image_info.empty());
DCHECK(!callback.is_null());
if (!CefCurrentlyOn(TID_UI)) {
CefPostTask(TID_UI, base::BindOnce(&ImageCache::LoadImages, this,
image_info, std::move(callback)));
return;
}
ImageSet images;
bool missing_images = false;
ImageInfoSet::const_iterator it = image_info.begin();
for (; it != image_info.end(); ++it) {
const ImageInfo& info = *it;
if (info.id_ == kEmptyId) {
// Image intentionally left empty.
images.push_back(nullptr);
continue;
}
ImageMap::iterator it2 = image_map_.find(info.id_);
if (it2 != image_map_.end()) {
if (!info.force_reload_) {
// Image already exists.
images.push_back(it2->second);
continue;
}
// Remove the existing image from the map.
image_map_.erase(it2);
}
// Load the image.
images.push_back(nullptr);
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if (!missing_images) {
missing_images = true;
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}
}
if (missing_images) {
CefPostTask(TID_FILE_USER_BLOCKING,
base::BindOnce(&ImageCache::LoadMissing, this, image_info,
images, std::move(callback)));
} else {
std::move(callback).Run(images);
}
}
CefRefPtr<CefImage> ImageCache::GetCachedImage(const std::string& image_id) {
CEF_REQUIRE_UI_THREAD();
DCHECK(!image_id.empty());
ImageMap::const_iterator it = image_map_.find(image_id);
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if (it != image_map_.end()) {
return it->second;
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}
return nullptr;
}
// static
ImageCache::ImageType ImageCache::GetImageType(const std::string& path) {
std::string ext = file_util::GetFileExtension(path);
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if (ext.empty()) {
return TYPE_NONE;
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}
ext = AsciiStrToLower(ext);
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if (ext == "png") {
return TYPE_PNG;
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}
if (ext == "jpg" || ext == "jpeg") {
return TYPE_JPEG;
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}
return TYPE_NONE;
}
void ImageCache::LoadMissing(const ImageInfoSet& image_info,
const ImageSet& images,
LoadImagesCallback callback) {
CEF_REQUIRE_FILE_USER_BLOCKING_THREAD();
DCHECK_EQ(image_info.size(), images.size());
ImageContentSet contents;
ImageInfoSet::const_iterator it1 = image_info.begin();
ImageSet::const_iterator it2 = images.begin();
for (; it1 != image_info.end() && it2 != images.end(); ++it1, ++it2) {
const ImageInfo& info = *it1;
ImageContent content;
if (*it2 || info.id_ == kEmptyId) {
// Image already exists or is intentionally empty.
content.image_ = *it2;
} else {
LoadImageContents(info, &content);
}
contents.push_back(content);
}
CefPostTask(TID_UI, base::BindOnce(&ImageCache::UpdateCache, this, image_info,
contents, std::move(callback)));
}
// static
bool ImageCache::LoadImageContents(const ImageInfo& info,
ImageContent* content) {
CEF_REQUIRE_FILE_USER_BLOCKING_THREAD();
ImageRepSet::const_iterator it = info.reps_.begin();
for (; it != info.reps_.end(); ++it) {
const ImageRep& rep = *it;
ImageType rep_type;
std::string rep_contents;
if (!LoadImageContents(rep.path_, info.internal_, &rep_type,
&rep_contents)) {
LOG(ERROR) << "Failed to load image " << info.id_ << " from path "
<< rep.path_;
return false;
}
content->contents_.emplace_back(rep_type, rep.scale_factor_, rep_contents);
}
return true;
}
// static
bool ImageCache::LoadImageContents(const std::string& path,
bool internal,
ImageType* type,
std::string* contents) {
CEF_REQUIRE_FILE_USER_BLOCKING_THREAD();
*type = GetImageType(path);
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if (*type == TYPE_NONE) {
return false;
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}
if (internal) {
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if (!LoadBinaryResource(path.c_str(), *contents)) {
return false;
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}
} else if (!file_util::ReadFileToString(path, contents)) {
return false;
}
return !contents->empty();
}
void ImageCache::UpdateCache(const ImageInfoSet& image_info,
const ImageContentSet& contents,
LoadImagesCallback callback) {
CEF_REQUIRE_UI_THREAD();
DCHECK_EQ(image_info.size(), contents.size());
ImageSet images;
ImageInfoSet::const_iterator it1 = image_info.begin();
ImageContentSet::const_iterator it2 = contents.begin();
for (; it1 != image_info.end() && it2 != contents.end(); ++it1, ++it2) {
const ImageInfo& info = *it1;
const ImageContent& content = *it2;
if (content.image_ || info.id_ == kEmptyId) {
// Image already exists or is intentionally empty.
images.push_back(content.image_);
} else {
CefRefPtr<CefImage> image = CreateImage(info.id_, content);
images.push_back(image);
// Add the image to the map.
image_map_.insert(std::make_pair(info.id_, image));
}
}
std::move(callback).Run(images);
}
// static
CefRefPtr<CefImage> ImageCache::CreateImage(const std::string& image_id,
const ImageContent& content) {
CEF_REQUIRE_UI_THREAD();
// Shouldn't be creating an image if one already exists.
DCHECK(!content.image_);
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if (content.contents_.empty()) {
return nullptr;
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}
CefRefPtr<CefImage> image = CefImage::CreateImage();
ImageContent::RepContentSet::const_iterator it = content.contents_.begin();
for (; it != content.contents_.end(); ++it) {
const ImageContent::RepContent& rep = *it;
if (rep.type_ == TYPE_PNG) {
if (!image->AddPNG(rep.scale_factor_, rep.contents_.c_str(),
rep.contents_.size())) {
LOG(ERROR) << "Failed to create image " << image_id << " for PNG@"
<< rep.scale_factor_;
return nullptr;
}
} else if (rep.type_ == TYPE_JPEG) {
if (!image->AddJPEG(rep.scale_factor_, rep.contents_.c_str(),
rep.contents_.size())) {
LOG(ERROR) << "Failed to create image " << image_id << " for JPG@"
<< rep.scale_factor_;
return nullptr;
}
} else {
NOTREACHED();
return nullptr;
}
}
return image;
}
} // namespace client