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// Copyright 2013 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 UI_VIEWS_LINUX_UI_LINUX_UI_H_
#define UI_VIEWS_LINUX_UI_LINUX_UI_H_
#include <string>
#include "base/callback.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/ime/linux/linux_input_method_context_factory.h"
#include "ui/events/linux/text_edit_key_bindings_delegate_auralinux.h"
#include "ui/gfx/linux_font_delegate.h"
#include "ui/shell_dialogs/linux_shell_dialog.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/linux_ui/status_icon_linux.h"
#include "ui/views/views_export.h"
// The main entrypoint into Linux toolkit specific code. GTK code should only
// be executed behind this interface.
namespace aura {
class Window;
}
namespace gfx {
class Image;
}
namespace ui {
class NativeTheme;
}
namespace views {
class Border;
class LabelButton;
class LabelButtonBorder;
class View;
class WindowButtonOrderObserver;
// Adapter class with targets to render like different toolkits. Set by any
// project that wants to do linux desktop native rendering.
//
// TODO(erg): We're hardcoding GTK2, when we'll need to have backends for (at
// minimum) GTK2 and GTK3. LinuxUI::instance() should actually be a very
// complex method that pokes around with dlopen against a libuigtk2.so, a
// liuigtk3.so, etc.
class VIEWS_EXPORT LinuxUI : public ui::LinuxInputMethodContextFactory,
public gfx::LinuxFontDelegate,
public ui::LinuxShellDialog,
public ui::TextEditKeyBindingsDelegateAuraLinux {
public:
// Describes the window management actions that could be taken in response to
// a middle click in the non client area.
enum NonClientMiddleClickAction {
MIDDLE_CLICK_ACTION_NONE,
MIDDLE_CLICK_ACTION_LOWER,
MIDDLE_CLICK_ACTION_MINIMIZE,
MIDDLE_CLICK_ACTION_TOGGLE_MAXIMIZE
};
typedef base::Callback<ui::NativeTheme*(aura::Window* window)>
NativeThemeGetter;
~LinuxUI() override {}
// Sets the dynamically loaded singleton that draws the desktop native UI.
static void SetInstance(LinuxUI* instance);
// Returns a LinuxUI instance for the toolkit used in the user's desktop
// environment.
//
// Can return NULL, in case no toolkit has been set. (For example, if we're
// running with the "--ash" flag.)
static LinuxUI* instance();
virtual void Initialize() = 0;
// Returns a themed image per theme_provider.h
virtual gfx::Image GetThemeImageNamed(int id) const = 0;
virtual bool GetColor(int id, SkColor* color) const = 0;
virtual bool HasCustomImage(int id) const = 0;
// Returns the preferences that we pass to WebKit.
virtual SkColor GetFocusRingColor() const = 0;
virtual SkColor GetThumbActiveColor() const = 0;
virtual SkColor GetThumbInactiveColor() const = 0;
virtual SkColor GetTrackColor() const = 0;
virtual SkColor GetActiveSelectionBgColor() const = 0;
virtual SkColor GetActiveSelectionFgColor() const = 0;
virtual SkColor GetInactiveSelectionBgColor() const = 0;
virtual SkColor GetInactiveSelectionFgColor() const = 0;
virtual double GetCursorBlinkInterval() const = 0;
// Returns a NativeTheme that will provide system colors and draw system
// style widgets.
virtual ui::NativeTheme* GetNativeTheme(aura::Window* window) const = 0;
// Used to set an override NativeTheme.
virtual void SetNativeThemeOverride(const NativeThemeGetter& callback) = 0;
// Returns whether we should be using the native theme provided by this
// object by default.
virtual bool GetDefaultUsesSystemTheme() const = 0;
// Sets visual properties in the desktop environment related to download
// progress, if available.
virtual void SetDownloadCount(int count) const = 0;
virtual void SetProgressFraction(float percentage) const = 0;
// Checks for platform support for status icons.
virtual bool IsStatusIconSupported() const = 0;
// Create a native status icon.
virtual scoped_ptr<StatusIconLinux> CreateLinuxStatusIcon(
const gfx::ImageSkia& image,
const base::string16& tool_tip) const = 0;
// Returns the icon for a given content type from the icon theme.
// TODO(davidben): Add an observer for the theme changing, so we can drop the
// caches.
virtual gfx::Image GetIconForContentType(
const std::string& content_type, int size) const = 0;
// Builds a Border which paints the native button style.
virtual scoped_ptr<Border> CreateNativeBorder(
views::LabelButton* owning_button,
scoped_ptr<views::LabelButtonBorder> border) = 0;
// Notifies the observer about changes about how window buttons should be
// laid out. If the order is anything other than the default min,max,close on
// the right, will immediately send a button change event to the observer.
virtual void AddWindowButtonOrderObserver(
WindowButtonOrderObserver* observer) = 0;
// Removes the observer from the LinuxUI's list.
virtual void RemoveWindowButtonOrderObserver(
WindowButtonOrderObserver* observer) = 0;
// Determines whether the user's window manager is Unity.
virtual bool UnityIsRunning() = 0;
// What action we should take when the user middle clicks on non-client
// area. The default is lowering the window.
virtual NonClientMiddleClickAction GetNonClientMiddleClickAction() = 0;
// Notifies the window manager that start up has completed.
// Normally Chromium opens a new window on startup and GTK does this
// automatically. In case Chromium does not open a new window on startup,
// e.g. an existing browser window already exists, this should be called.
virtual void NotifyWindowManagerStartupComplete() = 0;
};
} // namespace views
#endif // UI_VIEWS_LINUX_UI_LINUX_UI_H_
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