cef/libcef/browser/printing/print_dialog_linux.h

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// Copyright (c) 2014 The Chromium Embedded Framework Authors.
// Portions 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 LIBCEF_BROWSER_PRINTING_PRINT_DIALOG_LINUX_H_
#define LIBCEF_BROWSER_PRINTING_PRINT_DIALOG_LINUX_H_
#include "include/cef_print_handler.h"
Create a ChromeBrowserHostImpl for every Chrome tab (see issue #2969) The Browser object represents the top-level Chrome browser window. One or more tabs (WebContents) are then owned by the Browser object via TabStripModel. A new Browser object can be created programmatically using "new Browser" or Browser::Create, or as a result of user action such as dragging a tab out of an existing window. New or existing tabs can also be added to an already existing Browser object. The Browser object acts as the WebContentsDelegate for all attached tabs. CEF integration requires WebContentsDelegate callbacks and notification of tab attach/detach. To support this integration we add a cef::BrowserDelegate (ChromeBrowserDelegate) member that is created in the Browser constructor and receives delegation for the Browser callbacks. ChromeBrowserDelegate creates a new ChromeBrowserHostImpl when a tab is added to a Browser for the first time, and that ChromeBrowserHostImpl continues to exist until the tab's WebContents is destroyed. The associated WebContents object does not change, but the Browser object will change when the tab is dragged between windows. CEF callback logic is shared between the chrome and alloy runtimes where possible. This shared logic has been extracted from CefBrowserHostImpl to create new CefBrowserHostBase and CefBrowserContentsDelegate classes. The CefBrowserHostImpl class is now only used with the alloy runtime and will be renamed to AlloyBrowserHostImpl in a future commit.
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#include "libcef/browser/browser_host_base.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/sequenced_task_runner_helpers.h"
#include "content/public/browser/browser_thread.h"
#include "printing/print_dialog_gtk_interface.h"
#include "printing/printing_context_linux.h"
namespace printing {
class MetafilePlayer;
class PrintSettings;
} // namespace printing
using printing::PrintingContextLinux;
// Needs to be freed on the UI thread to clean up its member variables.
class CefPrintDialogLinux : public printing::PrintDialogGtkInterface,
public base::RefCountedThreadSafe<
CefPrintDialogLinux,
content::BrowserThread::DeleteOnUIThread> {
public:
// Creates and returns a print dialog.
static printing::PrintDialogGtkInterface* CreatePrintDialog(
PrintingContextLinux* context);
// Returns the paper size in device units.
static gfx::Size GetPdfPaperSize(printing::PrintingContextLinux* context);
// Notify the client when printing has started.
static void OnPrintStart(CefRefPtr<CefBrowserHostBase> browser);
// PrintDialogGtkInterface implementation.
void UseDefaultSettings() override;
void UpdateSettings(
std::unique_ptr<printing::PrintSettings> settings) override;
void ShowDialog(
gfx::NativeView parent_view,
bool has_selection,
PrintingContextLinux::PrintSettingsCallback callback) override;
void PrintDocument(const printing::MetafilePlayer& metafile,
const std::u16string& document_name) override;
void AddRefToDialog() override;
void ReleaseDialog() override;
private:
friend class base::DeleteHelper<CefPrintDialogLinux>;
friend class base::RefCountedThreadSafe<
CefPrintDialogLinux,
content::BrowserThread::DeleteOnUIThread>;
friend struct content::BrowserThread::DeleteOnThread<
content::BrowserThread::UI>;
friend class CefPrintDialogCallbackImpl;
friend class CefPrintJobCallbackImpl;
explicit CefPrintDialogLinux(PrintingContextLinux* context);
~CefPrintDialogLinux() override;
void SetHandler();
void ReleaseHandler();
bool UpdateSettings(std::unique_ptr<printing::PrintSettings> settings,
bool get_defaults);
// Prints document named |document_name|.
void SendDocumentToPrinter(const std::u16string& document_name);
// Handles print dialog response.
void OnPrintContinue(CefRefPtr<CefPrintSettings> settings);
void OnPrintCancel();
// Handles print job response.
void OnJobCompleted();
CefRefPtr<CefPrintHandler> handler_;
// Printing dialog callback.
PrintingContextLinux::PrintSettingsCallback callback_;
PrintingContextLinux* context_;
Create a ChromeBrowserHostImpl for every Chrome tab (see issue #2969) The Browser object represents the top-level Chrome browser window. One or more tabs (WebContents) are then owned by the Browser object via TabStripModel. A new Browser object can be created programmatically using "new Browser" or Browser::Create, or as a result of user action such as dragging a tab out of an existing window. New or existing tabs can also be added to an already existing Browser object. The Browser object acts as the WebContentsDelegate for all attached tabs. CEF integration requires WebContentsDelegate callbacks and notification of tab attach/detach. To support this integration we add a cef::BrowserDelegate (ChromeBrowserDelegate) member that is created in the Browser constructor and receives delegation for the Browser callbacks. ChromeBrowserDelegate creates a new ChromeBrowserHostImpl when a tab is added to a Browser for the first time, and that ChromeBrowserHostImpl continues to exist until the tab's WebContents is destroyed. The associated WebContents object does not change, but the Browser object will change when the tab is dragged between windows. CEF callback logic is shared between the chrome and alloy runtimes where possible. This shared logic has been extracted from CefBrowserHostImpl to create new CefBrowserHostBase and CefBrowserContentsDelegate classes. The CefBrowserHostImpl class is now only used with the alloy runtime and will be renamed to AlloyBrowserHostImpl in a future commit.
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CefRefPtr<CefBrowserHostBase> browser_;
base::FilePath path_to_pdf_;
DISALLOW_COPY_AND_ASSIGN(CefPrintDialogLinux);
};
#endif // LIBCEF_BROWSER_PRINTING_PRINT_DIALOG_LINUX_H_