PrintPreview: Print Preview is not staying associated with initiator renderer.

chrome/browser/ui/webui/print_preview_data_source.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/webui/print_preview_ui_html_source.h"
+#include "chrome/browser/ui/webui/print_preview_data_source.h"
 
 #include <algorithm>
 #include <vector>
 
+#include "base/memory/singleton.h"
 #include "base/message_loop.h"
 #include "base/shared_memory.h"
 #include "base/string_piece.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager_backend.h"
+#include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/common/jstemplate_builder.h"
 #include "chrome/common/url_constants.h"
 #include "grit/browser_resources.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/google_chrome_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace {
@@ skipping 78 matching lines @@
   localized_strings->SetString(std::string("copiesInstruction"),
       l10n_util::GetStringUTF8(IDS_PRINT_PREVIEW_COPIES_INSTRUCTION));
   localized_strings->SetString(std::string("managePrinters"),
       l10n_util::GetStringUTF8(IDS_PRINT_PREVIEW_MANAGE_PRINTERS));
   localized_strings->SetString(std::string("didYouMean"),
       l10n_util::GetStringUTF8(IDS_PRINT_PREVIEW_DID_YOU_MEAN));
 }
 
 }  // namespace
 
-PrintPreviewUIHTMLSource::PrintPreviewUIHTMLSource()
-    : DataSource(chrome::kChromeUIPrintHost, MessageLoop::current()),
-      data_(std::make_pair(static_cast<base::SharedMemory*>(NULL), 0U)) {
+PrintPreviewDataSource::PrintPreviewDataSource()
+    : DataSource(chrome::kChromeUIPrintHost, MessageLoop::current()) {
 }
 
-PrintPreviewUIHTMLSource::~PrintPreviewUIHTMLSource() {
-  delete data_.first;
+PrintPreviewDataSource::~PrintPreviewDataSource() {
 }
 
-void PrintPreviewUIHTMLSource::GetPrintPreviewData(PrintPreviewData* data) {
-  *data = data_;
+// static
+PrintPreviewDataSource* PrintPreviewDataSource::GetInstance() {
+  // Uses the LeakySingletonTrait because the base class will do the cleanup.
+  return Singleton<PrintPreviewDataSource,
+                   LeakySingletonTraits<PrintPreviewDataSource> >::get();
 }
 
-void PrintPreviewUIHTMLSource::SetPrintPreviewData(
-    const PrintPreviewData& data) {
-  delete data_.first;
-  data_ = data;
+void PrintPreviewDataSource::RemoveEntry(
+    const PreviewUIAddrStr& preview_ui_addr_str) {
+  PreviewDataSrcMap::iterator it = data_source_map_.find(preview_ui_addr_str);
+  if (it == data_source_map_.end())
+    return;
+
+  if (it->second.first)
+    delete it->second.first;
+  data_source_map_.erase(it);
 }
 
-void PrintPreviewUIHTMLSource::StartDataRequest(const std::string& path,
-                                                bool is_incognito,
-                                                int request_id) {
+void PrintPreviewDataSource::SetDataEntry(
+    const PreviewUIAddrStr& preview_ui_addr_str, const PrintPreviewData& data) {
+  RemoveEntry(preview_ui_addr_str);
+  data_source_map_[preview_ui_addr_str] = data;
+}
+
+void PrintPreviewDataSource::GetDataEntry(
+    const PreviewUIAddrStr& preview_ui_addr_str, PrintPreviewData* data) {
+  PreviewDataSrcMap::iterator i = data_source_map_.find(preview_ui_addr_str);

[Lei Zhang, 2011/05/26 01:48:31]

nit: name the iterator "it"

[kmadhusu, 2011/05/26 15:51:22]

Done.

+  if (i != data_source_map_.end())
+    *data = data_source_map_[preview_ui_addr_str];
+}
+
+void PrintPreviewDataSource::StartDataRequest(const std::string& path,
+                                              bool is_incognito,
+                                              int request_id) {
+  PrintPreviewData data;
+  if (path.size() > 10 && path.substr(0, 10) == "print.pdf/") {
+    // Get the print preview data.
+    GetDataEntry(path.substr(10), &data);

[Lei Zhang, 2011/05/26 01:48:31]

Why not just put this in the else if block below?

[kmadhusu, 2011/05/26 15:51:22]

If data.first is null, I want to send empty_bytes (which is the else block
statements).

+  }
+
   if (path.empty()) {
     // Print Preview Index page.
     DictionaryValue localized_strings;
     SetLocalizedStrings(&localized_strings);
     SetFontAndTextDirection(&localized_strings);
 
     static const base::StringPiece print_html(
         ResourceBundle::GetSharedInstance().GetRawDataResource(
             IDR_PRINT_PREVIEW_HTML));
     const std::string full_html = jstemplate_builder::GetI18nTemplateHtml(
         print_html, &localized_strings);
 
     scoped_refptr<RefCountedBytes> html_bytes(new RefCountedBytes);
     html_bytes->data.resize(full_html.size());
     std::copy(full_html.begin(), full_html.end(), html_bytes->data.begin());
 
     SendResponse(request_id, html_bytes);
     return;
-  } else if (path == "print.pdf" && data_.first) {
+  } else if (path.size() > 10 &&
+             path.substr(0, 10) == "print.pdf/" &&
+             data.first) {
     // Print Preview data.
-    char* preview_data = reinterpret_cast<char*>(data_.first->memory());
-    uint32 preview_data_size = data_.second;
+    char* preview_data = reinterpret_cast<char*>(data.first->memory());
+    uint32 preview_data_size = data.second;
 
     scoped_refptr<RefCountedBytes> html_bytes(new RefCountedBytes);
     html_bytes->data.resize(preview_data_size);
     std::vector<unsigned char>::iterator it = html_bytes->data.begin();
     for (uint32 i = 0; i < preview_data_size; ++i, ++it)
       *it = *(preview_data + i);
     SendResponse(request_id, html_bytes);
     return;
-  } else {
+ } else {
     // Invalid request.
     scoped_refptr<RefCountedBytes> empty_bytes(new RefCountedBytes);
     SendResponse(request_id, empty_bytes);
     return;
   }
 }
 
-std::string PrintPreviewUIHTMLSource::GetMimeType(
-    const std::string& path) const {
-  // Print Preview Index page.
+std::string PrintPreviewDataSource::GetMimeType(const std::string& path) const {
   if (path.empty())
-    return "text/html";
-  // Print Preview data.
-  return "application/pdf";
+    return "text/html";  // Print Preview Index Page.
+  return "application/pdf";  // Print Preview data
 }