Implement window.print() on Android

chrome/browser/printing/print_job_worker.cc

Index: chrome/browser/printing/print_job_worker.cc
diff --git a/chrome/browser/printing/print_job_worker.cc b/chrome/browser/printing/print_job_worker.cc
index ee8cddea181a9a759182b4d828a3d4a45ae424da..87ffac28e1edf13de129b5812eccae1532490d74 100644
--- a/chrome/browser/printing/print_job_worker.cc
+++ b/chrome/browser/printing/print_job_worker.cc
@@ -10,6 +10,7 @@
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
 #include "base/values.h"
+#include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/printing/print_job.h"
@@ -44,6 +45,8 @@ class PrintingContextDelegate : public PrintingContext::Delegate {
   gfx::NativeView GetParentView() override;
   std::string GetAppLocale() override;
 
+  void ShowSystemDialog() override;
+
  private:
   int render_process_id_;
   int render_view_id_;
@@ -72,6 +75,22 @@ std::string PrintingContextDelegate::GetAppLocale() {
   return g_browser_process->GetApplicationLocale();
 }
 
+void PrintingContextDelegate::ShowSystemDialog() {
+  LOG(INFO) << "DGN PrintingContextDelegate::ShowSystemDialog";
+#if defined(OS_ANDROID)
+  // Tab (Printable) needed to print. How to call it without the tab directly?
+  // Removing the dependency on chrome would make it easier to move it to
+  // printing_context_android
+  content::RenderViewHost* view = content::RenderViewHost::FromID(
+      render_process_id_, render_view_id_);
+  DCHECK(view);
+  content::WebContents* wc = content::WebContents::FromRenderViewHost(view);
+  TabAndroid* tab = TabAndroid::FromWebContents(wc);
+  if (tab) tab->ShowPrintDialog();
+#endif
+}
+
+
 void NotificationCallback(PrintJobWorkerOwner* print_job,
                           JobEventDetails::Type detail_type,
                           PrintedDocument* document,
@@ -112,13 +131,15 @@ void PrintJobWorker::SetNewOwner(PrintJobWorkerOwner* new_owner) {
 }
 
 void PrintJobWorker::GetSettings(
-    bool ask_user_for_settings,
+    GetSettingsAskParam ask_user_for_settings,
     int document_page_count,
     bool has_selection,
     MarginType margin_type) {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
   DCHECK_EQ(page_number_, PageNumber::npos());
 
+  LOG(INFO) << "DGN GetSettings - askParam: " << ask_user_for_settings;
+
   // Recursive task processing is needed for the dialog in case it needs to be
   // destroyed by a task.
   // TODO(thestig): This code is wrong. SetNestableTasksAllowed(true) is needed
@@ -129,7 +150,7 @@ void PrintJobWorker::GetSettings(
 
   // When we delegate to a destination, we don't ask the user for settings.
   // TODO(mad): Ask the destination for settings.
-  if (ask_user_for_settings) {
+  if (ask_user_for_settings == GetSettingsAskParam::ASK_USER) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&HoldRefCallback, make_scoped_refptr(owner_),
@@ -137,6 +158,13 @@ void PrintJobWorker::GetSettings(
                               base::Unretained(this),
                               document_page_count,
                               has_selection)));
+  } else if (ask_user_for_settings == GetSettingsAskParam::SYSTEM_SPECIFIC) {
+    LOG(INFO) << "DGN SYSTEM_SPECIFIC! ";
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&HoldRefCallback, make_scoped_refptr(owner_),
+                   base::Bind(&PrintJobWorker::ShowSystemDialog,
+                              base::Unretained(this))));
   } else {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
@@ -146,6 +174,19 @@ void PrintJobWorker::GetSettings(
   }
 }
 
+void PrintJobWorker::ShowSystemDialog() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  LOG(INFO) << "DGN ShowSystemDialog";
+
+  if (printing_context_ == NULL) LOG(INFO) << "DGN printing_context_ is NULL";
+
+  printing_context_->SetPrintSettingsCallback(
+        base::Bind(&PrintJobWorkerOwner::ShowSystemDialogDone,
+                   base::Unretained(owner_)));
+
+  printing_context_delegate_->ShowSystemDialog();
+}
+
 void PrintJobWorker::SetSettings(
     scoped_ptr<base::DictionaryValue> new_settings) {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
@@ -190,11 +231,11 @@ void PrintJobWorker::GetSettingsWithUI(
     int document_page_count,
     bool has_selection) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  printing_context_->AskUserForSettings(
-      document_page_count,
-      has_selection,
-      base::Bind(&PrintJobWorker::GetSettingsWithUIDone,
-                 base::Unretained(this)));
+    printing_context_->AskUserForSettings(
+        document_page_count,
+        has_selection,
+        base::Bind(&PrintJobWorker::GetSettingsWithUIDone,
+                   base::Unretained(this)));
 }
 
 void PrintJobWorker::GetSettingsWithUIDone(PrintingContext::Result result) {