| // 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 CHROME_BROWSER_THEMES_BROWSER_THEME_PACK_H_ |
| #define CHROME_BROWSER_THEMES_BROWSER_THEME_PACK_H_ |
| |
| #include <map> |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/sequenced_task_runner_helpers.h" |
| #include "chrome/browser/themes/custom_theme_supplier.h" |
| #include "extensions/common/extension.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "ui/base/layout.h" |
| #include "ui/gfx/color_utils.h" |
| |
| namespace base { |
| class DictionaryValue; |
| class FilePath; |
| class RefCountedMemory; |
| } |
| |
| namespace extensions { |
| class Extensions; |
| } |
| |
| namespace gfx { |
| class Image; |
| } |
| |
| namespace ui { |
| class DataPack; |
| } |
| |
| // An optimized representation of a theme, backed by a mmapped DataPack. |
| // |
| // The idea is to pre-process all images (tinting, compositing, etc) at theme |
| // install time, save all the PNG-ified data into an mmappable file so we don't |
| // suffer multiple file system access times, therefore solving two of the |
| // problems with the previous implementation. |
| // |
| // A note on const-ness. All public, non-static methods are const. We do this |
| // because once we've constructed a BrowserThemePack through the |
| // BuildFromExtension() interface, we WriteToDisk() on a thread other than the |
| // UI thread that consumes a BrowserThemePack. There is no locking; thread |
| // safety between the writing thread and the UI thread is ensured by having the |
| // data be immutable. |
| // |
| // BrowserThemePacks are always deleted on the file thread because in the |
| // common case, they are backed by mmapped data and the unmmapping operation |
| // will trip our IO on the UI thread detector. |
| class BrowserThemePack : public CustomThemeSupplier { |
| public: |
| // Builds the theme pack from all data from |extension|. This is often done |
| // on a separate thread as it takes so long. This can fail and return NULL in |
| // the case where the theme has invalid data. |
| static scoped_refptr<BrowserThemePack> BuildFromExtension( |
| const extensions::Extension* extension); |
| |
| // Builds the theme pack from a previously performed WriteToDisk(). This |
| // operation should be relatively fast, as it should be an mmap() and some |
| // pointer swizzling. Returns NULL on any error attempting to read |path|. |
| static scoped_refptr<BrowserThemePack> BuildFromDataPack( |
| const base::FilePath& path, const std::string& expected_id); |
| |
| // Returns the set of image IDRs which can be overwritten by a user provided |
| // theme. |
| static void GetThemeableImageIDRs(std::set<int>* result); |
| |
| // Builds a data pack on disk at |path| for future quick loading by |
| // BuildFromDataPack(). Often (but not always) called from the file thread; |
| // implementation should be threadsafe because neither thread will write to |
| // |image_memory_| and the worker thread will keep a reference to prevent |
| // destruction. |
| bool WriteToDisk(const base::FilePath& path) const; |
| |
| // Overridden from CustomThemeSupplier: |
| bool GetTint(int id, color_utils::HSL* hsl) const override; |
| bool GetColor(int id, SkColor* color) const override; |
| bool GetDisplayProperty(int id, int* result) const override; |
| gfx::Image GetImageNamed(int id) override; |
| base::RefCountedMemory* GetRawData(int id, ui::ScaleFactor scale_factor) |
| const override; |
| bool HasCustomImage(int id) const override; |
| |
| private: |
| friend class BrowserThemePackTest; |
| |
| // Cached images. |
| typedef std::map<int, gfx::Image> ImageCache; |
| |
| // The raw PNG memory associated with a certain id. |
| typedef std::map<int, scoped_refptr<base::RefCountedMemory> > RawImages; |
| |
| // The type passed to ui::DataPack::WritePack. |
| typedef std::map<uint16, base::StringPiece> RawDataForWriting; |
| |
| // Maps scale factors (enum values) to file paths. |
| typedef std::map<ui::ScaleFactor, base::FilePath> ScaleFactorToFileMap; |
| |
| // Maps image ids to maps of scale factors to file paths. |
| typedef std::map<int, ScaleFactorToFileMap> FilePathMap; |
| |
| // Default. Everything is empty. |
| BrowserThemePack(); |
| |
| ~BrowserThemePack() override; |
| |
| // Builds a header ready to write to disk. |
| void BuildHeader(const extensions::Extension* extension); |
| |
| // Transforms the JSON tint values into their final versions in the |tints_| |
| // array. |
| void BuildTintsFromJSON(const base::DictionaryValue* tints_value); |
| |
| // Transforms the JSON color values into their final versions in the |
| // |colors_| array and also fills in unspecified colors based on tint values. |
| void BuildColorsFromJSON(const base::DictionaryValue* color_value); |
| |
| // Implementation details of BuildColorsFromJSON(). |
| void ReadColorsFromJSON(const base::DictionaryValue* colors_value, |
| std::map<int, SkColor>* temp_colors); |
| void GenerateMissingColors(std::map<int, SkColor>* temp_colors); |
| |
| // Transforms the JSON display properties into |display_properties_|. |
| void BuildDisplayPropertiesFromJSON( |
| const base::DictionaryValue* display_value); |
| |
| // Parses the image names out of an extension. |
| void ParseImageNamesFromJSON(const base::DictionaryValue* images_value, |
| const base::FilePath& images_path, |
| FilePathMap* file_paths) const; |
| |
| // Helper function to populate the FilePathMap. |
| void AddFileAtScaleToMap(const std::string& image_name, |
| ui::ScaleFactor scale_factor, |
| const base::FilePath& image_path, |
| FilePathMap* file_paths) const; |
| |
| // Creates the data for |source_images_| from |file_paths|. |
| void BuildSourceImagesArray(const FilePathMap& file_paths); |
| |
| // Loads the unmodified images packed in the extension to SkBitmaps. Returns |
| // true if all images loaded. |
| bool LoadRawBitmapsTo(const FilePathMap& file_paths, |
| ImageCache* image_cache); |
| |
| // Populate |images| cache with empty gfx::Images. Image reps are lazily |
| // generated when an image rep is requested via ImageSkia::GetRepresentation. |
| // Source and destination is |images|. |
| void CreateImages(ImageCache* images) const; |
| |
| // Crops images down to a size such that most of the cropped image will be |
| // displayed in the UI. Cropping is useful because images from custom themes |
| // can be of any size. Source and destination is |images|. |
| void CropImages(ImageCache* images) const; |
| |
| // Creates tinted and composited frame images. Source and destination is |
| // |images|. |
| void CreateFrameImages(ImageCache* images) const; |
| |
| // Creates button images tinted with |button_tint| and places them in |
| // processed_images. |
| void CreateTintedButtons(const color_utils::HSL& button_tint, |
| ImageCache* processed_images) const; |
| |
| // Creates the semi-transparent tab background images, putting the results |
| // in |images|. Must be called after GenerateFrameImages(). |
| void CreateTabBackgroundImages(ImageCache* images) const; |
| |
| // Takes all the SkBitmaps in |images|, encodes them as PNGs and places |
| // them in |reencoded_images|. |
| void RepackImages(const ImageCache& images, |
| RawImages* reencoded_images) const; |
| |
| // Takes all images in |source| and puts them in |destination|, freeing any |
| // image already in |destination| that |source| would overwrite. |
| void MergeImageCaches(const ImageCache& source, |
| ImageCache* destination) const; |
| |
| // Copies images from |source| to |destination| such that the lifetimes of |
| // the images in |destination| are not affected by the lifetimes of the |
| // images in |source|. |
| void CopyImagesTo(const ImageCache& source, ImageCache* destination) const; |
| |
| // Changes the RefCountedMemory based |images| into StringPiece data in |out|. |
| void AddRawImagesTo(const RawImages& images, RawDataForWriting* out) const; |
| |
| // Retrieves the tint OR the default tint. Unlike the public interface, we |
| // always need to return a reasonable tint here, instead of partially |
| // querying if the tint exists. |
| color_utils::HSL GetTintInternal(int id) const; |
| |
| // Returns a unique id to use to store the raw bitmap for |prs_id| at |
| // |scale_factor| in memory. |
| int GetRawIDByPersistentID(int prs_id, ui::ScaleFactor scale_factor) const; |
| |
| // Returns true if the |key| specifies a valid scale (e.g. "100") and |
| // the corresponding scale factor is currently in use. If true, returns |
| // the scale factor in |scale_factor|. |
| bool GetScaleFactorFromManifestKey(const std::string& key, |
| ui::ScaleFactor* scale_factor) const; |
| |
| // Generates raw images for any missing scale from an available scale. |
| void GenerateRawImageForAllSupportedScales(int prs_id); |
| |
| // Data pack, if we have one. |
| scoped_ptr<ui::DataPack> data_pack_; |
| |
| // All structs written to disk need to be packed; no alignment tricks here, |
| // please. |
| #pragma pack(push,1) |
| // Header that is written to disk. |
| struct BrowserThemePackHeader { |
| // Numeric version to make sure we're compatible in the future. |
| int32 version; |
| |
| // 1 if little_endian. 0 if big_endian. On mismatch, abort load. |
| int32 little_endian; |
| |
| // theme_id without NULL terminator. |
| uint8 theme_id[16]; |
| } *header_; |
| |
| // The remaining structs represent individual entries in an array. For the |
| // following three structs, BrowserThemePack will either allocate an array or |
| // will point directly to mmapped data. |
| struct TintEntry { |
| int32 id; |
| double h; |
| double s; |
| double l; |
| } *tints_; |
| |
| struct ColorPair { |
| int32 id; |
| SkColor color; |
| } *colors_; |
| |
| struct DisplayPropertyPair { |
| int32 id; |
| int32 property; |
| } *display_properties_; |
| |
| // A list of included source images. A pointer to a -1 terminated array of |
| // our persistent IDs. |
| int* source_images_; |
| #pragma pack(pop) |
| |
| // The scale factors represented by the images in the theme pack. |
| std::vector<ui::ScaleFactor> scale_factors_; |
| |
| // References to raw PNG data. This map isn't touched when |data_pack_| is |
| // non-NULL; |image_memory_| is only filled during BuildFromExtension(). Any |
| // image data that needs to be written to the DataPack during WriteToDisk() |
| // needs to be in |image_memory_|. |
| RawImages image_memory_; |
| |
| // Loaded images. These are loaded from |image_memory_|, from |data_pack_|, |
| // and by BuildFromExtension(). These images should only be accessed on the UI |
| // thread. |
| ImageCache images_on_ui_thread_; |
| |
| // Cache of images created in BuildFromExtension(). Once the theme pack is |
| // created, this cache should only be accessed on the file thread. There |
| // should be no IDs in |image_memory_| that are in |images_on_file_thread_| |
| // or vice versa. |
| ImageCache images_on_file_thread_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BrowserThemePack); |
| }; |
| |
| #endif // CHROME_BROWSER_THEMES_BROWSER_THEME_PACK_H_ |