cef/libcef/browser/printing/print_dialog_linux.cc

300 lines
8.1 KiB
C++

// 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/extensions/browser_extensions_util.h"
#include "libcef/browser/print_settings_impl.h"
#include "libcef/browser/thread_util.h"
#include "libcef/common/app_manager.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/lazy_instance.h"
#include "base/logging.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) {}
void Continue(CefRefPtr<CefPrintSettings> settings) override {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_.get()) {
dialog_->OnPrintContinue(settings);
dialog_ = nullptr;
}
} else {
CEF_POST_TASK(CEF_UIT, base::Bind(&CefPrintDialogCallbackImpl::Continue,
this, settings));
}
}
void Cancel() override {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_.get()) {
dialog_->OnPrintCancel();
dialog_ = nullptr;
}
} else {
CEF_POST_TASK(CEF_UIT,
base::Bind(&CefPrintDialogCallbackImpl::Cancel, this));
}
}
void Disconnect() { dialog_ = nullptr; }
private:
CefRefPtr<CefPrintDialogLinux> dialog_;
IMPLEMENT_REFCOUNTING(CefPrintDialogCallbackImpl);
DISALLOW_COPY_AND_ASSIGN(CefPrintDialogCallbackImpl);
};
class CefPrintJobCallbackImpl : public CefPrintJobCallback {
public:
explicit CefPrintJobCallbackImpl(CefRefPtr<CefPrintDialogLinux> dialog)
: dialog_(dialog) {}
void Continue() override {
if (CEF_CURRENTLY_ON_UIT()) {
if (dialog_.get()) {
dialog_->OnJobCompleted();
dialog_ = nullptr;
}
} else {
CEF_POST_TASK(CEF_UIT,
base::Bind(&CefPrintJobCallbackImpl::Continue, this));
}
}
void Disconnect() { dialog_ = nullptr; }
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);
}
// static
gfx::Size CefPrintDialogLinux::GetPdfPaperSize(
printing::PrintingContextLinux* context) {
CEF_REQUIRE_UIT();
gfx::Size size;
auto browser = extensions::GetOwnerBrowserForFrameRoute(
context->render_process_id(), context->render_frame_id(), nullptr);
DCHECK(browser);
if (browser && browser->GetClient()) {
if (auto handler = browser->GetClient()->GetPrintHandler()) {
const printing::PrintSettings& settings = context->settings();
CefSize cef_size = handler->GetPdfPaperSize(
browser.get(), settings.device_units_per_inch());
size.SetSize(cef_size.width, cef_size.height);
}
}
if (size.IsEmpty()) {
LOG(ERROR) << "Empty size value returned in GetPdfPaperSize; "
"PDF printing will fail.";
}
return size;
}
// static
void CefPrintDialogLinux::OnPrintStart(CefRefPtr<CefBrowserHostBase> browser) {
CEF_REQUIRE_UIT();
DCHECK(browser);
if (browser && browser->GetClient()) {
if (auto handler = browser->GetClient()->GetPrintHandler()) {
handler->OnPrintStart(browser.get());
}
}
}
CefPrintDialogLinux::CefPrintDialogLinux(PrintingContextLinux* context)
: context_(context) {
DCHECK(context_);
browser_ = extensions::GetOwnerBrowserForFrameRoute(
context_->render_process_id(), context_->render_frame_id(), nullptr);
DCHECK(browser_);
}
CefPrintDialogLinux::~CefPrintDialogLinux() {
// It's not safe to dereference |context_| during the destruction of this
// object because the PrintJobWorker which owns |context_| may already have
// been deleted.
CEF_REQUIRE_UIT();
ReleaseHandler();
}
void CefPrintDialogLinux::UseDefaultSettings() {
UpdateSettings(std::make_unique<PrintSettings>(), true);
}
void CefPrintDialogLinux::UpdateSettings(
std::unique_ptr<PrintSettings> settings) {
UpdateSettings(std::move(settings), false);
}
void CefPrintDialogLinux::ShowDialog(
gfx::NativeView parent_view,
bool has_selection,
PrintingContextLinux::PrintSettingsCallback callback) {
CEF_REQUIRE_UIT();
SetHandler();
if (!handler_.get()) {
std::move(callback).Run(PrintingContextLinux::CANCEL);
return;
}
callback_ = std::move(callback);
CefRefPtr<CefPrintDialogCallbackImpl> callback_impl(
new CefPrintDialogCallbackImpl(this));
if (!handler_->OnPrintDialog(browser_.get(), has_selection,
callback_impl.get())) {
callback_impl->Disconnect();
OnPrintCancel();
}
}
void CefPrintDialogLinux::PrintDocument(
const printing::MetafilePlayer& 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 success = base::CreateTemporaryFile(&path_to_pdf_);
if (success) {
base::File file;
file.Initialize(path_to_pdf_,
base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
success = metafile.SaveTo(&file);
file.Close();
if (!success)
base::DeleteFile(path_to_pdf_);
}
if (!success) {
LOG(ERROR) << "Saving metafile failed";
// Matches AddRef() above.
Release();
return;
}
// 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_.get())
return;
if (browser_ && browser_->GetClient()) {
handler_ = browser_->GetClient()->GetPrintHandler();
}
}
void CefPrintDialogLinux::ReleaseHandler() {
if (handler_.get()) {
handler_->OnPrintReset(browser_.get());
handler_ = nullptr;
}
}
bool CefPrintDialogLinux::UpdateSettings(
std::unique_ptr<PrintSettings> settings,
bool get_defaults) {
CEF_REQUIRE_UIT();
SetHandler();
if (!handler_.get())
return false;
CefRefPtr<CefPrintSettingsImpl> settings_impl(
new CefPrintSettingsImpl(std::move(settings), false));
handler_->OnPrintSettings(browser_.get(), settings_impl.get(), get_defaults);
context_->InitWithSettings(settings_impl->TakeOwnership());
return true;
}
void CefPrintDialogLinux::SendDocumentToPrinter(
const base::string16& document_name) {
CEF_REQUIRE_UIT();
if (!handler_.get()) {
OnJobCompleted();
return;
}
CefRefPtr<CefPrintJobCallbackImpl> callback_impl(
new CefPrintJobCallbackImpl(this));
if (!handler_->OnPrintJob(browser_.get(), 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());
context_->InitWithSettings(impl->TakeOwnership());
std::move(callback_).Run(PrintingContextLinux::OK);
}
void CefPrintDialogLinux::OnPrintCancel() {
std::move(callback_).Run(PrintingContextLinux::CANCEL);
}
void CefPrintDialogLinux::OnJobCompleted() {
CEF_POST_BACKGROUND_TASK(
base::BindOnce(base::GetDeleteFileCallback(), path_to_pdf_));
// Printing finished. Matches AddRef() in PrintDocument();
Release();
}