cef/libcef/browser/printing/print_dialog_linux.cc

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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.
#include "libcef/browser/printing/print_dialog_linux.h"
#include <string>
#include <vector>
#include "libcef/browser/print_settings_impl.h"
#include "libcef/browser/thread_util.h"
#include "libcef/common/content_client.h"
#include "base/bind.h"
#include "base/file_util.h"
#include "base/files/file_util_proxy.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "printing/metafile.h"
#include "printing/print_job_constants.h"
#include "printing/print_settings.h"
using content::BrowserThread;
using printing::PageRanges;
using printing::PrintSettings;
class CefPrintDialogCallbackImpl : public CefPrintDialogCallback {
public:
explicit CefPrintDialogCallbackImpl(CefRefPtr<CefPrintDialogLinux> dialog)
: dialog_(dialog) {
}
virtual void Continue(CefRefPtr<CefPrintSettings> settings) OVERRIDE {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_) {
dialog_->OnPrintContinue(settings);
dialog_ = NULL;
}
} else {
CEF_POST_TASK(CEF_UIT,
base::Bind(&CefPrintDialogCallbackImpl::Continue, this, settings));
}
}
virtual void Cancel() OVERRIDE {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_) {
dialog_->OnPrintCancel();
dialog_ = NULL;
}
} else {
CEF_POST_TASK(CEF_UIT,
base::Bind(&CefPrintDialogCallbackImpl::Cancel, this));
}
}
void Disconnect() {
dialog_ = NULL;
}
private:
CefRefPtr<CefPrintDialogLinux> dialog_;
IMPLEMENT_REFCOUNTING(CefPrintDialogCallbackImpl);
DISALLOW_COPY_AND_ASSIGN(CefPrintDialogCallbackImpl);
};
class CefPrintJobCallbackImpl : public CefPrintJobCallback {
public:
explicit CefPrintJobCallbackImpl(CefRefPtr<CefPrintDialogLinux> dialog)
: dialog_(dialog) {
}
virtual void Continue() OVERRIDE {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_) {
dialog_->OnJobCompleted();
dialog_ = NULL;
}
} else {
CEF_POST_TASK(CEF_UIT,
base::Bind(&CefPrintJobCallbackImpl::Continue, this));
}
}
void Disconnect() {
dialog_ = NULL;
}
private:
CefRefPtr<CefPrintDialogLinux> dialog_;
IMPLEMENT_REFCOUNTING(CefPrintJobCallbackImpl);
DISALLOW_COPY_AND_ASSIGN(CefPrintJobCallbackImpl);
};
// static
printing::PrintDialogGtkInterface* CefPrintDialogLinux::CreatePrintDialog(
PrintingContextLinux* context) {
CEF_REQUIRE_UIT();
return new CefPrintDialogLinux(context);
}
CefPrintDialogLinux::CefPrintDialogLinux(PrintingContextLinux* context)
: context_(context) {
}
CefPrintDialogLinux::~CefPrintDialogLinux() {
CEF_REQUIRE_UIT();
ReleaseHandler();
}
void CefPrintDialogLinux::UseDefaultSettings() {
PrintSettings settings;
UpdateSettings(&settings, true);
}
bool CefPrintDialogLinux::UpdateSettings(printing::PrintSettings* settings) {
return UpdateSettings(settings, false);
}
void CefPrintDialogLinux::ShowDialog(
gfx::NativeView parent_view,
bool has_selection,
const PrintingContextLinux::PrintSettingsCallback& callback) {
CEF_REQUIRE_UIT();
SetHandler();
if (!handler_) {
callback.Run(PrintingContextLinux::CANCEL);
return;
}
callback_ = callback;
CefRefPtr<CefPrintDialogCallbackImpl> callback_impl(
new CefPrintDialogCallbackImpl(this));
if (!handler_->OnPrintDialog(has_selection, callback_impl.get())) {
callback_impl->Disconnect();
OnPrintCancel();
}
}
void CefPrintDialogLinux::PrintDocument(const printing::Metafile* metafile,
const base::string16& document_name) {
// This runs on the print worker thread, does not block the UI thread.
DCHECK(!CEF_CURRENTLY_ON_UIT());
// The document printing tasks can outlive the PrintingContext that created
// this dialog.
AddRef();
bool error = false;
if (!base::CreateTemporaryFile(&path_to_pdf_)) {
LOG(ERROR) << "Creating temporary file failed";
error = true;
}
if (!error && !metafile->SaveTo(path_to_pdf_)) {
LOG(ERROR) << "Saving metafile failed";
base::DeleteFile(path_to_pdf_, false);
error = true;
}
if (error) {
// Matches AddRef() above.
Release();
} else {
// No errors, continue printing.
CEF_POST_TASK(
CEF_UIT,
base::Bind(&CefPrintDialogLinux::SendDocumentToPrinter, this,
document_name));
}
}
void CefPrintDialogLinux::AddRefToDialog() {
AddRef();
}
void CefPrintDialogLinux::ReleaseDialog() {
Release();
}
void CefPrintDialogLinux::SetHandler() {
if (handler_)
return;
CefRefPtr<CefApp> app = CefContentClient::Get()->application();
if (app.get()) {
CefRefPtr<CefBrowserProcessHandler> browser_handler =
app->GetBrowserProcessHandler();
if (browser_handler)
handler_ = browser_handler->GetPrintHandler();
}
}
void CefPrintDialogLinux::ReleaseHandler() {
if (handler_) {
handler_->OnPrintReset();
handler_ = NULL;
}
}
bool CefPrintDialogLinux::UpdateSettings(printing::PrintSettings* settings,
bool get_defaults) {
CEF_REQUIRE_UIT();
SetHandler();
if (!handler_)
return false;
CefRefPtr<CefPrintSettingsImpl> settings_impl(
new CefPrintSettingsImpl(settings, false, false));
handler_->OnPrintSettings(settings_impl.get(), get_defaults);
settings_impl->Detach(NULL);
context_->InitWithSettings(*settings);
return true;
}
void CefPrintDialogLinux::SendDocumentToPrinter(
const base::string16& document_name) {
CEF_REQUIRE_UIT();
if (!handler_) {
OnJobCompleted();
return;
}
CefRefPtr<CefPrintJobCallbackImpl> callback_impl(
new CefPrintJobCallbackImpl(this));
if (!handler_->OnPrintJob(document_name, path_to_pdf_.value(),
callback_impl.get())) {
callback_impl->Disconnect();
OnJobCompleted();
}
}
void CefPrintDialogLinux::OnPrintContinue(
CefRefPtr<CefPrintSettings> settings) {
{
CefPrintSettingsImpl* impl =
static_cast<CefPrintSettingsImpl*>(settings.get());
CefValueController::AutoLock lock_scope(impl->controller());
context_->InitWithSettings(impl->print_settings());
}
callback_.Run(PrintingContextLinux::OK);
callback_.Reset();
}
void CefPrintDialogLinux::OnPrintCancel() {
callback_.Run(PrintingContextLinux::CANCEL);
callback_.Reset();
}
void CefPrintDialogLinux::OnJobCompleted() {
base::FileUtilProxy::DeleteFile(
content::BrowserThread::GetMessageLoopProxyForThread(
BrowserThread::FILE).get(),
path_to_pdf_,
false,
base::FileUtilProxy::StatusCallback());
// Printing finished. Matches AddRef() in PrintDocument();
Release();
}