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cef/libcef/browser/printing/print_view_manager.cc

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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.
#include "libcef/browser/printing/print_view_manager.h"
#include "include/internal/cef_types_wrappers.h"
#include <map>
#include <utility>
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/memory/ptr_util.h"
#include "base/memory/ref_counted_memory.h"
#include "base/task/post_task.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/printing/print_job_manager.h"
#include "chrome/browser/printing/printer_query.h"
#include "components/printing/common/print_messages.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "printing/metafile_skia.h"
#include "libcef/browser/thread_util.h"
using content::BrowserThread;
namespace printing {
namespace {
const int PREVIEW_UIID = 12345678;
// Convert CefPdfPrintSettings into base::DictionaryValue.
void FillInDictionaryFromPdfPrintSettings(
const CefPdfPrintSettings& pdf_settings,
int request_id,
base::DictionaryValue& print_settings) {
// Fixed settings.
print_settings.SetBoolean(kSettingPrintToPDF, true);
print_settings.SetBoolean(kSettingCloudPrintDialog, false);
print_settings.SetBoolean(kSettingPrintWithPrivet, false);
print_settings.SetBoolean(kSettingPrintWithExtension, false);
print_settings.SetInteger(kSettingColor, GRAY);
print_settings.SetInteger(kSettingDuplexMode, SIMPLEX);
print_settings.SetInteger(kSettingCopies, 1);
print_settings.SetBoolean(kSettingCollate, false);
print_settings.SetString(kSettingDeviceName, "");
print_settings.SetBoolean(kSettingRasterizePdf, false);
print_settings.SetBoolean(kSettingPreviewModifiable, false);
print_settings.SetInteger(kSettingDpiHorizontal, 0);
print_settings.SetInteger(kSettingDpiVertical, 0);
print_settings.SetInteger(kSettingPagesPerSheet, 1);
// User defined settings.
print_settings.SetBoolean(kSettingLandscape, !!pdf_settings.landscape);
print_settings.SetBoolean(kSettingShouldPrintSelectionOnly,
!!pdf_settings.selection_only);
print_settings.SetBoolean(kSettingShouldPrintBackgrounds,
!!pdf_settings.backgrounds_enabled);
print_settings.SetBoolean(kSettingHeaderFooterEnabled,
!!pdf_settings.header_footer_enabled);
print_settings.SetInteger(kSettingScaleFactor, pdf_settings.scale_factor > 0
? pdf_settings.scale_factor
: 100);
if (pdf_settings.header_footer_enabled) {
print_settings.SetString(
kSettingHeaderFooterTitle,
CefString(&pdf_settings.header_footer_title).ToString16());
print_settings.SetString(
kSettingHeaderFooterURL,
CefString(&pdf_settings.header_footer_url).ToString16());
}
if (pdf_settings.page_width > 0 && pdf_settings.page_height > 0) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
dict->SetInteger(kSettingMediaSizeWidthMicrons, pdf_settings.page_width);
dict->SetInteger(kSettingMediaSizeHeightMicrons, pdf_settings.page_height);
print_settings.Set(kSettingMediaSize, std::move(dict));
}
int margin_type = DEFAULT_MARGINS;
switch (pdf_settings.margin_type) {
case PDF_PRINT_MARGIN_NONE:
margin_type = NO_MARGINS;
break;
case PDF_PRINT_MARGIN_MINIMUM:
margin_type = PRINTABLE_AREA_MARGINS;
break;
case PDF_PRINT_MARGIN_CUSTOM:
margin_type = CUSTOM_MARGINS;
break;
default:
break;
}
print_settings.SetInteger(kSettingMarginsType, margin_type);
if (margin_type == CUSTOM_MARGINS) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
dict->SetDouble(kSettingMarginTop, pdf_settings.margin_top);
dict->SetDouble(kSettingMarginRight, pdf_settings.margin_right);
dict->SetDouble(kSettingMarginBottom, pdf_settings.margin_bottom);
dict->SetDouble(kSettingMarginLeft, pdf_settings.margin_left);
print_settings.Set(kSettingMarginsCustom, std::move(dict));
}
// Service settings.
print_settings.SetInteger(kPreviewUIID, PREVIEW_UIID);
print_settings.SetInteger(kPreviewRequestID, request_id);
print_settings.SetBoolean(kIsFirstRequest, request_id != 0);
}
void StopWorker(int document_cookie) {
if (document_cookie <= 0)
return;
scoped_refptr<PrintQueriesQueue> queue =
g_browser_process->print_job_manager()->queue();
scoped_refptr<PrinterQuery> printer_query =
queue->PopPrinterQuery(document_cookie);
if (printer_query.get()) {
base::PostTaskWithTraits(
FROM_HERE, {BrowserThread::IO},
base::Bind(&PrinterQuery::StopWorker, printer_query));
}
}
// Write the PDF file to disk.
void SavePdfFile(scoped_refptr<base::RefCountedSharedMemoryMapping> data,
const base::FilePath& path,
const CefPrintViewManager::PdfPrintCallback& callback) {
CEF_REQUIRE_BLOCKING();
DCHECK_GT(data->size(), 0U);
MetafileSkia metafile;
metafile.InitFromData(static_cast<const void*>(data->front()), data->size());
base::File file(path,
base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
bool ok = file.IsValid() && metafile.SaveTo(&file);
if (!callback.is_null()) {
base::PostTaskWithTraits(FROM_HERE, {BrowserThread::UI},
base::Bind(callback, ok));
}
}
} // namespace
struct CefPrintViewManager::PdfPrintState {
content::RenderFrameHost* printing_rfh_ = nullptr;
base::FilePath output_path_;
base::DictionaryValue settings_;
PdfPrintCallback callback_;
};
CefPrintViewManager::CefPrintViewManager(content::WebContents* web_contents)
: CefPrintViewManagerBase(web_contents) {}
CefPrintViewManager::~CefPrintViewManager() {
TerminatePdfPrintJob();
}
bool CefPrintViewManager::PrintToPDF(content::RenderFrameHost* rfh,
const base::FilePath& path,
const CefPdfPrintSettings& settings,
const PdfPrintCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Don't start print again while printing is currently in progress.
if (pdf_print_state_)
return false;
// Don't print interstitials or crashed tabs.
if (!web_contents() || web_contents()->ShowingInterstitialPage() ||
web_contents()->IsCrashed()) {
return false;
}
pdf_print_state_.reset(new PdfPrintState);
pdf_print_state_->printing_rfh_ = rfh;
pdf_print_state_->output_path_ = path;
pdf_print_state_->callback_ = callback;
FillInDictionaryFromPdfPrintSettings(settings, ++next_pdf_request_id_,
pdf_print_state_->settings_);
rfh->Send(new PrintMsg_InitiatePrintPreview(rfh->GetRoutingID(),
!!settings.selection_only));
return true;
}
void CefPrintViewManager::RenderFrameDeleted(
content::RenderFrameHost* render_frame_host) {
if (pdf_print_state_ &&
render_frame_host == pdf_print_state_->printing_rfh_) {
TerminatePdfPrintJob();
}
CefPrintViewManagerBase::RenderFrameDeleted(render_frame_host);
}
void CefPrintViewManager::NavigationStopped() {
TerminatePdfPrintJob();
CefPrintViewManagerBase::NavigationStopped();
}
void CefPrintViewManager::RenderProcessGone(base::TerminationStatus status) {
TerminatePdfPrintJob();
CefPrintViewManagerBase::RenderProcessGone(status);
}
bool CefPrintViewManager::OnMessageReceived(
const IPC::Message& message,
content::RenderFrameHost* render_frame_host) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(CefPrintViewManager, message,
render_frame_host)
IPC_MESSAGE_HANDLER(PrintHostMsg_DidShowPrintDialog, OnDidShowPrintDialog)
IPC_MESSAGE_HANDLER(PrintHostMsg_RequestPrintPreview, OnRequestPrintPreview)
IPC_MESSAGE_HANDLER(PrintHostMsg_MetafileReadyForPrinting,
OnMetafileReadyForPrinting)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled ||
CefPrintViewManagerBase::OnMessageReceived(message, render_frame_host);
}
void CefPrintViewManager::OnDidShowPrintDialog(content::RenderFrameHost* rfh) {}
void CefPrintViewManager::OnRequestPrintPreview(
const PrintHostMsg_RequestPrintPreview_Params&) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!pdf_print_state_)
return;
pdf_print_state_->printing_rfh_->Send(
new PrintMsg_PrintPreview(pdf_print_state_->printing_rfh_->GetRoutingID(),
pdf_print_state_->settings_));
}
void CefPrintViewManager::OnMetafileReadyForPrinting(
content::RenderFrameHost* render_frame_host,
const PrintHostMsg_DidPreviewDocument_Params& params,
const PrintHostMsg_PreviewIds& ids) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
StopWorker(params.document_cookie);
if (!pdf_print_state_)
return;
auto shared_buf = base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(
params.content.metafile_data_region);
if (!shared_buf) {
TerminatePdfPrintJob();
return;
}
const base::FilePath output_path = pdf_print_state_->output_path_;
const PdfPrintCallback print_callback = pdf_print_state_->callback_;
// Reset state information.
pdf_print_state_.reset();
// Save the PDF file to disk and then execute the callback.
CEF_POST_USER_VISIBLE_TASK(
base::Bind(&SavePdfFile, shared_buf, output_path, print_callback));
}
void CefPrintViewManager::TerminatePdfPrintJob() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!pdf_print_state_)
return;
if (!pdf_print_state_->callback_.is_null()) {
// Execute the callback.
base::PostTaskWithTraits(FROM_HERE, {BrowserThread::UI},
base::Bind(pdf_print_state_->callback_, false));
}
// Reset state information.
pdf_print_state_.reset();
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(CefPrintViewManager)
} // namespace printing
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