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// Copyright (c) 2009 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.
//
// Download utilities.
#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/task.h"
#include "gfx/native_widget_types.h"
#if defined(TOOLKIT_VIEWS)
#include "views/view.h"
#endif
namespace gfx {
class Canvas;
}
class BaseDownloadItemModel;
class DictionaryValue;
class DownloadItem;
class FilePath;
class SkBitmap;
namespace download_util {
// DownloadProgressTask --------------------------------------------------------
// A class for managing the timed progress animations for a download view. The
// view must implement an UpdateDownloadProgress() method.
template<class DownloadView>
class DownloadProgressTask : public Task {
public:
explicit DownloadProgressTask(DownloadView* view) : view_(view) {}
virtual ~DownloadProgressTask() {}
virtual void Run() {
view_->UpdateDownloadProgress();
}
private:
DownloadView* view_;
DISALLOW_COPY_AND_ASSIGN(DownloadProgressTask);
};
// Download opening ------------------------------------------------------------
// Whether it is OK to open this download.
bool CanOpenDownload(DownloadItem* download);
// Open the file associated with this download (wait for the download to
// complete if it is in progress).
void OpenDownload(DownloadItem* download);
// Download temporary file creation --------------------------------------------
// Return the default download directory.
const FilePath& GetDefaultDownloadDirectory();
// Create a temporary file for a download in the user's default download
// directory and return true if was successful in creating the file.
bool CreateTemporaryFileForDownload(FilePath* path);
// Return true if the |download_path| is dangerous path.
bool DownloadPathIsDangerous(const FilePath& download_path);
// Download progress animations ------------------------------------------------
// Arc sweep angle for use with downloads of unknown size
const int kUnknownAngleDegrees = 50;
// Rate of progress for use with downloads of unknown size
const int kUnknownIncrementDegrees = 12;
// Start angle for downloads with known size (midnight position)
const int kStartAngleDegrees = -90;
// A circle
const int kMaxDegrees = 360;
// Progress animation timer period, in milliseconds.
const int kProgressRateMs = 150;
// XP and Vista must support icons of this size.
const int kSmallIconSize = 16;
const int kBigIconSize = 32;
// Our progress halo around the icon.
int GetBigProgressIconSize();
const int kSmallProgressIconSize = 39;
const int kBigProgressIconSize = 52;
// The offset required to center the icon in the progress bitmaps.
int GetBigProgressIconOffset();
const int kSmallProgressIconOffset =
(kSmallProgressIconSize - kSmallIconSize) / 2;
enum PaintDownloadProgressSize {
SMALL = 0,
BIG
};
// Paint the common download animation progress foreground and background,
// clipping the foreground to 'percent' full. If percent is -1, then we don't
// know the total size, so we just draw a rotating segment until we're done.
//
// |containing_view| is the View subclass within which the progress animation
// is drawn (generally either DownloadItemTabView or DownloadItemView). We
// require the containing View in addition to the canvas because if we are
// drawing in a right-to-left locale, we need to mirror the position of the
// progress animation within the containing View.
void PaintDownloadProgress(gfx::Canvas* canvas,
#if defined(TOOLKIT_VIEWS)
views::View* containing_view,
#endif
int origin_x,
int origin_y,
int start_angle,
int percent,
PaintDownloadProgressSize size);
void PaintDownloadComplete(gfx::Canvas* canvas,
#if defined(TOOLKIT_VIEWS)
views::View* containing_view,
#endif
int origin_x,
int origin_y,
double animation_progress,
PaintDownloadProgressSize size);
// Drag support ----------------------------------------------------------------
// Helper function for download views to use when acting as a drag source for a
// DownloadItem. If |icon| is NULL, no image will be accompany the drag. |view|
// is only required for Mac OS X, elsewhere it can be NULL.
void DragDownload(const DownloadItem* download,
SkBitmap* icon,
gfx::NativeView view);
// Executable file support -----------------------------------------------------
// Determine if the specified extension is an executable extension.
bool IsExecutableExtension(const std::string& extension);
// Helpers ---------------------------------------------------------------------
// Creates a representation of a download in a format that the downloads
// HTML page can understand.
DictionaryValue* CreateDownloadItemValue(DownloadItem* download, int id);
// Get the localized status text for an in-progress download.
std::wstring GetProgressStatusText(DownloadItem* download);
// Update the application icon to indicate overall download progress.
// |download_count| is the number of downloads currently in progress. If
// |progress_known| is false, then at least one download is of indeterminate
// size and |progress| is invalid, otherwise |progress| indicates the overall
// download progress (float value from 0..1).
void UpdateAppIconDownloadProgress(int download_count,
bool progress_known,
float progress);
// Appends the passed the number between parenthesis the path before the
// extension.
void AppendNumberToPath(FilePath* path, int number);
// Attempts to find a number that can be appended to that path to make it
// unique. If |path| does not exist, 0 is returned. If it fails to find such
// a number, -1 is returned.
int GetUniquePathNumber(const FilePath& path);
} // namespace download_util
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
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