Prepopulating "Print To PDF" select file dialog with a suggested filename and path.

chrome/browser/ui/webui/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview_handler.cc
index 9811baf05001402a808f2ac6898a8fa00ca94682..a1c69513058d84f4f483f140bd30affcc9dde7ad 100644
--- a/chrome/browser/ui/webui/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview_handler.cc
@@ -6,21 +6,26 @@
 
 #include <string>
 
+#include "base/i18n/file_util_icu.h"
 #include "base/json/json_reader.h"
+#include "base/path_service.h"
 #include "base/threading/thread.h"
 #include "base/values.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/ui/webui/print_preview_ui_html_source.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
+#include "chrome/common/chrome_paths.h"
 #include "chrome/common/print_messages.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
+#include "grit/generated_resources.h"
 #include "printing/backend/print_backend.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "printing/print_job_constants.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
@@ -140,11 +145,17 @@ class PrintToPdfTask : public Task {
   FilePath path_;
 };
 
+FilePath* PrintPreviewHandler::last_saved_path_ = NULL;
+
 PrintPreviewHandler::PrintPreviewHandler()
     : print_backend_(printing::PrintBackend::CreateInstance(NULL)),
       need_to_generate_preview_(true),
       color_(kColorDefaultValue),
       landscape_(kLandscapeDefaultValue) {
+  if (!last_saved_path_) {
+    last_saved_path_ = new FilePath();
+    PathService::Get(chrome::DIR_USER_DOCUMENTS, last_saved_path_);

[Lei Zhang, 2011/04/14 00:15:45]

BTW, you can't do this - file access on the UI thread.

[dpapad, 2011/04/14 02:33:35]

Added a scoped exception for the moment. Alternatively, a synchronous
renderer-to-browser Message could be dispatched  if it is considerer a better
technique.

+  }
 }
 
 PrintPreviewHandler::~PrintPreviewHandler() {
@@ -202,11 +213,23 @@ void PrintPreviewHandler::HandlePrint(const ListValue* args) {
   if (!settings.get())
     return;
 
-  bool print_to_pdf;
+  bool print_to_pdf = false;
   settings->GetBoolean(printing::kSettingPrintToPDF, &print_to_pdf);
 
   if (print_to_pdf) {
-    SelectFile();
+    // Pre-populating select file dialog with print job title.
+    FilePath::StringType print_job_title;

[Lei Zhang, 2011/04/14 00:15:45]

I think you can instead just do the following:

    TabContentsWrapper* wrapper =
TabContentsWrapper::GetCurrentWrapperForContents(web_ui_->tab_contents());      
                      
    string16 print_job_title =
wrapper->print_view_manager()->RenderSourceName();                              
                         
    std::string print_job_title_utf8 = UTF16ToUTF8(print_job_title);

You'll need a #ifdef for Windows vs Posix though.

[dpapad, 2011/04/14 02:33:35]

Done.

+    bool ret = settings->GetString(printing::kPrintJobTitle, &print_job_title);
+    if (!ret || print_job_title.length() == 0)
+      print_job_title = l10n_util::GetStringUTF8(
+          IDS_DEFAULT_PRINT_DOCUMENT_TITLE);
+
+    file_util::ReplaceIllegalCharactersInPath(&print_job_title, '_');
+    FilePath default_filename(print_job_title);
+    default_filename =
+        default_filename.ReplaceExtension(FILE_PATH_LITERAL("pdf"));
+
+    SelectFile(default_filename);
   } else {
     RenderViewHost* rvh = web_ui_->GetRenderViewHost();
     rvh->Send(new PrintMsg_PrintForPrintPreview(rvh->routing_id(), *settings));
@@ -240,7 +263,7 @@ void PrintPreviewHandler::ProcessLandscapeSetting(
   }
 }
 
-void PrintPreviewHandler::SelectFile() {
+void PrintPreviewHandler::SelectFile(const FilePath& default_filename) {
   SelectFileDialog::FileTypeInfo file_type_info;
   file_type_info.extensions.resize(1);
   file_type_info.extensions[0].push_back(FILE_PATH_LITERAL("pdf"));
@@ -251,7 +274,7 @@ void PrintPreviewHandler::SelectFile() {
   select_file_dialog_->SelectFile(
       SelectFileDialog::SELECT_SAVEAS_FILE,
       string16(),
-      FilePath(),
+      last_saved_path_->Append(default_filename),
       &file_type_info,
       0,
       FILE_PATH_LITERAL(""),
@@ -271,6 +294,9 @@ void PrintPreviewHandler::FileSelected(const FilePath& path,
   printing::PreviewMetafile* metafile = new printing::PreviewMetafile;
   metafile->InitFromData(data.first->memory(), data.second);
 
+  // Updating last_saved_path_ to the newly selected folder.
+  *last_saved_path_ = path.DirName();
+
   PrintToPdfTask* task = new PrintToPdfTask(metafile, path);
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, task);
 }