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 3f277c594182f0c9904fb903c3e1e70b1436946d..cd57882e4ca6febc0305498ff6d3401604caeb9c 100644
--- a/chrome/browser/printing/print_job_worker.cc
+++ b/chrome/browser/printing/print_job_worker.cc
@@ -24,6 +24,10 @@
 #include "printing/printing_utils.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if defined(OS_ANDROID)
+#include "chrome/browser/android/tab_android.h"
+#endif
+
 using content::BrowserThread;
 
 namespace printing {
@@ -117,7 +121,7 @@ void PrintJobWorker::SetNewOwner(PrintJobWorkerOwner* new_owner) {
 }
 
 void PrintJobWorker::GetSettings(
-    bool ask_user_for_settings,
+    PrinterQuery::GetSettingsAskParam ask_settings_type,
     int document_page_count,
     bool has_selection,
     MarginType margin_type) {
@@ -134,7 +138,7 @@ 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_settings_type == PrinterQuery::GetSettingsAskParam::ASK_USER) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&HoldRefCallback, make_scoped_refptr(owner_),
@@ -142,6 +146,13 @@ void PrintJobWorker::GetSettings(
                               base::Unretained(this),
                               document_page_count,
                               has_selection)));
+  } else if (ask_settings_type ==
+      PrinterQuery::GetSettingsAskParam::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,
@@ -151,6 +162,26 @@ void PrintJobWorker::GetSettings(
   }
 }
 
+void PrintJobWorker::ShowSystemDialog() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+#if defined(OS_ANDROID)
+  PrintingContextDelegate* pcd =
+      static_cast<PrintingContextDelegate*>(printing_context_delegate_.get());
+  content::WebContents* wc = pcd->GetWebContents();

[Vitaly Buka (NO REVIEWS), 2014/12/12 08:37:16]

please merge ShowSystemDialog and GetSettingsWithUI and branch as low as
possible
ideally in context

I see that you need TabAndroid for that, we will refactor delegate in future CL
for that.

+  TabAndroid* tab = TabAndroid::FromWebContents(wc);
+  if (tab) {
+    // If fails or is not called, attempting to start a pending print does
+    // nothing and will notify that printing is finished.
+    tab->SetPendingPrint();
+  }
+#endif
+
+  printing_context_->RequestSystemDialog(
+        base::Bind(&PrintJobWorker::GetSettingsDone,
+                   base::Unretained(this)));
+}
+
 void PrintJobWorker::SetSettings(
     scoped_ptr<base::DictionaryValue> new_settings) {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());