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// Copyright 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/resource/resource_bundle.h"
#import <QuartzCore/QuartzCore.h>
#import <UIKit/UIKit.h>
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/mac/bundle_locations.h"
#include "base/mac/foundation_util.h"
#include "base/mac/scoped_nsobject.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/sys_string_conversions.h"
#include "base/synchronization/lock.h"
#include "ui/base/resource/resource_handle.h"
#include "ui/gfx/image/image.h"
namespace ui {
namespace {
base::FilePath GetResourcesPakFilePath(NSString* name, NSString* mac_locale) {
NSString *resource_path;
if ([mac_locale length]) {
resource_path = [base::mac::FrameworkBundle() pathForResource:name
ofType:@"pak"
inDirectory:@""
forLocalization:mac_locale];
} else {
resource_path = [base::mac::FrameworkBundle() pathForResource:name
ofType:@"pak"];
}
if (!resource_path) {
// Return just the name of the pak file.
return base::FilePath(base::SysNSStringToUTF8(name) + ".pak");
}
return base::FilePath([resource_path fileSystemRepresentation]);
}
} // namespace
void ResourceBundle::LoadCommonResources() {
if (IsScaleFactorSupported(SCALE_FACTOR_100P)) {
AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_100_percent", nil),
SCALE_FACTOR_100P);
}
if (IsScaleFactorSupported(SCALE_FACTOR_200P)) {
AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_200_percent", nil),
SCALE_FACTOR_200P);
}
if (IsScaleFactorSupported(SCALE_FACTOR_300P)) {
AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_300_percent", nil),
SCALE_FACTOR_300P);
}
}
base::FilePath ResourceBundle::GetLocaleFilePath(const std::string& app_locale,
bool test_file_exists) {
NSString* mac_locale = base::SysUTF8ToNSString(app_locale);
// iOS uses "_" instead of "-", so swap to get a iOS-style value.
mac_locale = [mac_locale stringByReplacingOccurrencesOfString:@"-"
withString:@"_"];
// On disk, the "en_US" resources are just "en" (http://crbug.com/25578).
if ([mac_locale isEqual:@"en_US"])
mac_locale = @"en";
base::FilePath locale_file_path =
GetResourcesPakFilePath(@"locale", mac_locale);
if (delegate_) {
locale_file_path =
delegate_->GetPathForLocalePack(locale_file_path, app_locale);
}
// Don't try to load empty values or values that are not absolute paths.
if (locale_file_path.empty() || !locale_file_path.IsAbsolute())
return base::FilePath();
if (test_file_exists && !base::PathExists(locale_file_path))
return base::FilePath();
return locale_file_path;
}
gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id, ImageRTL rtl) {
// Flipped images are not used on iOS.
DCHECK_EQ(rtl, RTL_DISABLED);
// Check to see if the image is already in the cache.
{
base::AutoLock lock(*images_and_fonts_lock_);
ImageMap::iterator found = images_.find(resource_id);
if (found != images_.end()) {
return found->second;
}
}
gfx::Image image;
if (delegate_)
image = delegate_->GetNativeImageNamed(resource_id, rtl);
if (image.IsEmpty()) {
// Load the raw data from the resource pack at the current supported scale
// factor. This code assumes that only one of the possible scale factors is
// supported at runtime, based on the device resolution.
ui::ScaleFactor scale_factor = GetMaxScaleFactor();
scoped_refptr<base::RefCountedStaticMemory> data(
LoadDataResourceBytesForScale(resource_id, scale_factor));
if (!data.get()) {
LOG(WARNING) << "Unable to load image with id " << resource_id;
return GetEmptyImage();
}
// Create a data object from the raw bytes.
base::scoped_nsobject<NSData> ns_data(
[[NSData alloc] initWithBytes:data->front() length:data->size()]);
bool is_fallback = PNGContainsFallbackMarker(data->front(), data->size());
// Create the image from the data.
CGFloat target_scale = ui::GetScaleForScaleFactor(scale_factor);
CGFloat source_scale = is_fallback ? 1.0 : target_scale;
base::scoped_nsobject<UIImage> ui_image(
[[UIImage alloc] initWithData:ns_data scale:source_scale]);
// If the image is a 1x fallback, scale it up to a full-size representation.
if (is_fallback) {
CGSize source_size = [ui_image size];
CGSize target_size = CGSizeMake(source_size.width * target_scale,
source_size.height * target_scale);
base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
CGColorSpaceCreateDeviceRGB());
base::ScopedCFTypeRef<CGContextRef> context(CGBitmapContextCreate(
NULL,
target_size.width,
target_size.height,
8,
target_size.width * 4,
color_space,
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host));
CGRect target_rect = CGRectMake(0, 0,
target_size.width, target_size.height);
CGContextSetBlendMode(context, kCGBlendModeCopy);
CGContextDrawImage(context, target_rect, [ui_image CGImage]);
base::ScopedCFTypeRef<CGImageRef> cg_image(
CGBitmapContextCreateImage(context));
ui_image.reset([[UIImage alloc] initWithCGImage:cg_image
scale:target_scale
orientation:UIImageOrientationUp]);
}
if (!ui_image.get()) {
LOG(WARNING) << "Unable to load image with id " << resource_id;
NOTREACHED(); // Want to assert in debug mode.
return GetEmptyImage();
}
// The gfx::Image takes ownership.
image = gfx::Image(ui_image.release());
}
base::AutoLock lock(*images_and_fonts_lock_);
// Another thread raced the load and has already cached the image.
if (images_.count(resource_id))
return images_[resource_id];
images_[resource_id] = image;
return images_[resource_id];
}
} // namespace ui
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