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// 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_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/string16.h"
class SavePackage;
namespace content {
class DownloadItem;
}
namespace gfx {
class Font;
}
// This class is an abstraction for common UI tasks associated with a download.
class BaseDownloadItemModel {
public:
explicit BaseDownloadItemModel(content::DownloadItem* download)
: download_(download) { }
virtual ~BaseDownloadItemModel() { }
// Cancel the task corresponding to the item.
virtual void CancelTask() = 0;
// Returns a short one-line status string for the download.
virtual string16 GetStatusText() const = 0;
// Returns a string suitable for use as a tooltip. For a regular download, the
// tooltip is the filename. For an interrupted download, the string states the
// filename and a short description of the reason for interruption. For
// example:
// Report.pdf
// Network disconnected
// |font| and |max_width| are used to elide the filename and/or interrupt
// reason as necessary to keep the width of the tooltip text under
// |max_width|. The tooltip will be at most 2 lines.
virtual string16 GetTooltipText(const gfx::Font& font,
int max_width) const = 0;
// Rough percent complete. Returns -1 if the progress is unknown.
virtual int PercentComplete() const = 0;
// Get the warning text to display for a dangerous download. The |base_width|
// is the maximum width of an embedded filename (if there is one). The metrics
// for the filename will be based on |font|. Should only be called if
// IsDangerous() is true.
virtual string16 GetWarningText(const gfx::Font& font,
int base_width) const = 0;
// Get the caption text for a button for confirming a dangerous download
// warning.
virtual string16 GetWarningConfirmButtonText() const = 0;
// Is this considered a malicious download? Implies IsDangerous().
virtual bool IsMalicious() const = 0;
// Is this considered a dangerous download?
virtual bool IsDangerous() const = 0;
// Get the total number of bytes for this download. Should return 0 if the
// total size of the download is not known.
virtual int64 GetTotalBytes() const = 0;
// Get the number of bytes that has completed so far.
virtual int64 GetCompletedBytes() const = 0;
content::DownloadItem* download() { return download_; }
// Get the status message of the given interrupt |reason|.
static string16 InterruptReasonStatusMessage(int reason);
// Get the description of the given interrupt |reason|.
static string16 InterruptReasonMessage(int reason);
protected:
content::DownloadItem* download_;
};
// Concrete implementation of BaseDownloadItemModel.
class DownloadItemModel : public BaseDownloadItemModel {
public:
explicit DownloadItemModel(content::DownloadItem* download);
virtual ~DownloadItemModel() { }
// BaseDownloadItemModel
virtual void CancelTask() OVERRIDE;
virtual string16 GetStatusText() const OVERRIDE;
virtual string16 GetTooltipText(const gfx::Font& font,
int max_width) const OVERRIDE;
virtual int PercentComplete() const OVERRIDE;
virtual string16 GetWarningText(const gfx::Font& font,
int base_width) const OVERRIDE;
virtual string16 GetWarningConfirmButtonText() const OVERRIDE;
virtual bool IsMalicious() const OVERRIDE;
virtual bool IsDangerous() const OVERRIDE;
virtual int64 GetTotalBytes() const OVERRIDE;
virtual int64 GetCompletedBytes() const OVERRIDE;
protected:
// Returns true if |download_| is a Drive dwonload. Protected virtual for
// testing.
virtual bool IsDriveDownload() const;
private:
// Returns a string representations of the current download progress sizes. If
// the total size of the download is known, this string looks like: "100/200
// MB" where the numerator is the transferred size and the denominator is the
// total size. If the total isn't known, returns the transferred size as a
// string (e.g.: "100 MB").
string16 GetProgressSizesString() const;
// Returns a string indicating the status of an in-progress download.
string16 GetInProgressStatusString() const;
DISALLOW_COPY_AND_ASSIGN(DownloadItemModel);
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_MODEL_H_
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