Upstream printing changes.

android_webview/browser/renderer_host/print_manager.cc

+// Copyright (c) 2013 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 "android_webview/browser/renderer_host/print_manager.h"
+
+#include "android_webview/browser/aw_browser_context.h"
+#include "android_webview/common/print_messages.h"
+#include "android_webview/common/render_view_messages.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/callback.h"
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "content/public/browser/browser_thread.h"
+#include "printing/print_settings.h"
+
+using content::BrowserThread;
+using printing::PrintSettings;
+
+namespace android_webview {
+
+PrintManager::PrintManager(content::WebContents* contents,
+                           PrintSettings* settings,
+                           int fd,
+                           PrintManagerDelegate* delegate)
+    : content::WebContentsObserver(contents),
+      settings_(settings),
+      fd_(fd),
+      delegate_(delegate),
+      number_pages_(0),
+      cookie_(1),
+      printing_(false) {
+  DCHECK(delegate_);
+}
+
+PrintManager::~PrintManager() {}
+
+bool PrintManager::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PrintManager, message)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetPrintedPagesCount,
+                        OnDidGetPrintedPagesCount)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetDocumentCookie,
+                        OnDidGetDocumentCookie)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_PrintingFailed, OnPrintingFailed)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(PrintHostMsg_GetDefaultPrintSettings,
+                                    OnGetDefaultPrintSettings)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_AllocateTempFileForPrinting,
+                        OnAllocateTempFileForPrinting)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_TempFileForPrintingWritten,
+                        OnTempFileForPrintingWritten)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled ? true : WebContentsObserver::OnMessageReceived(message);
+}
+
+void PrintManager::OnAllocateTempFileForPrinting(
+    base::FileDescriptor* temp_file_fd,
+    int* sequence_number) {
+  // we don't really use the sequence number.
+  *sequence_number = 0;
+  temp_file_fd->fd = fd_;
+  temp_file_fd->auto_close = false;
+}
+
+void PrintManager::OnTempFileForPrintingWritten(int sequence_number) {
+  delegate_->DidExportPdf(true);
+}
+
+void PrintManager::OnDidGetPrintedPagesCount(int cookie,
+                                             int number_pages) {
+  DCHECK_GT(cookie, 0);
+  DCHECK_GT(number_pages, 0);
+  number_pages_ = number_pages;
+}
+
+void PrintManager::OnDidGetDocumentCookie(int cookie) {
+  cookie_ = cookie;
+}
+
+void PrintManager::OnGetDefaultPrintSettings(IPC::Message* reply_msg) {
+  // Unlike the printing_message_filter, we do process this in ui thread
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  OnGetDefaultPrintSettingsReply(reply_msg);
+}
+
+void RenderParamsFromPrintSettings(const printing::PrintSettings& settings,
+                                   PrintMsg_Print_Params* params) {
+  params->page_size = settings.page_setup_device_units().physical_size();
+  params->content_size.SetSize(
+      settings.page_setup_device_units().content_area().width(),
+      settings.page_setup_device_units().content_area().height());
+  params->printable_area.SetRect(
+      settings.page_setup_device_units().printable_area().x(),
+      settings.page_setup_device_units().printable_area().y(),
+      settings.page_setup_device_units().printable_area().width(),
+      settings.page_setup_device_units().printable_area().height());
+  params->margin_top = settings.page_setup_device_units().content_area().y();
+  params->margin_left = settings.page_setup_device_units().content_area().x();
+  params->dpi = settings.dpi();
+  // Currently hardcoded at 1.25. See PrintSettings' constructor.
+  params->min_shrink = settings.min_shrink();
+  // Currently hardcoded at 2.0. See PrintSettings' constructor.
+  params->max_shrink = settings.max_shrink();
+  // Currently hardcoded at 72dpi. See PrintSettings' constructor.
+  params->desired_dpi = settings.desired_dpi();
+  // Always use an invalid cookie.
+  params->document_cookie = 0;
+  params->selection_only = settings.selection_only();
+  params->supports_alpha_blend = settings.supports_alpha_blend();
+  params->should_print_backgrounds = settings.should_print_backgrounds();
+  params->display_header_footer = settings.display_header_footer();
+  params->title = settings.title();
+  params->url = settings.url();
+}
+
+void PrintManager::OnGetDefaultPrintSettingsReply(IPC::Message* reply_msg) {
+  PrintMsg_Print_Params params;
+  RenderParamsFromPrintSettings(*settings_, &params);
+  params.document_cookie = cookie_;
+  PrintHostMsg_GetDefaultPrintSettings::WriteReplyParams(reply_msg, params);
+  Send(reply_msg);
+}
+
+void PrintManager::OnPrintingFailed(int cookie) {
+  if (cookie != cookie_) {
+    NOTREACHED();
+    return;
+  }
+  delegate_->DidExportPdf(false);
+}
+
+bool PrintManager::PrintNow() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (printing_)
+    return false;
+
+  printing_ = true;
+  return Send(new PrintMsg_PrintPages(routing_id()));
+}
+
+}  // namespace android_webview