1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Contains code for handling "about:" URLs in the browser process. 6 7 #ifndef CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_ 8 #define CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_ 9 #pragma once 10 11 #include <map> 12 #include <string> 13 #include <vector> 14 15 #include "base/process.h" 16 #include "base/string_util.h" 17 18 template <typename T> struct DefaultSingletonTraits; 19 class GURL; 20 class Profile; 21 22 // Decides whether the given URL will be handled by the browser about handler 23 // and returns true if so. On true, it may also modify the given URL to be the 24 // final form (we fix up most "about:" URLs to be "chrome:" because WebKit 25 // handles all "about:" URLs as "about:blank. 26 // 27 // This is used by BrowserURLHandler. 28 bool WillHandleBrowserAboutURL(GURL* url, Profile* profile); 29 30 // Register the data source for chrome://about URLs. 31 // Safe to call multiple times. 32 void InitializeAboutDataSource(Profile* profile); 33 34 // We have a few magic commands that don't cause navigations, but rather pop up 35 // dialogs. This function handles those cases, and returns true if so. In this 36 // case, normal tab navigation should be skipped. 37 bool HandleNonNavigationAboutURL(const GURL& url); 38 39 // Gets the paths that are shown in about:about. 40 std::vector<std::string> AboutPaths(); 41 42 #if defined(USE_TCMALLOC) 43 // A map of header strings (e.g. "Browser", "Renderer PID 123") 44 // to the tcmalloc output collected for each process. 45 typedef std::map<std::string, std::string> AboutTcmallocOutputsType; 46 47 class AboutTcmallocOutputs { 48 public: 49 // Returns the singleton instance. 50 static AboutTcmallocOutputs* GetInstance(); 51 outputs()52 AboutTcmallocOutputsType* outputs() { return &outputs_; } 53 54 // Records the output for a specified header string. SetOutput(const std::string & header,const std::string & output)55 void SetOutput(const std::string& header, const std::string& output) { 56 outputs_[header] = output; 57 } 58 59 // Callback for output returned from renderer processes. Adds 60 // the output for a canonical renderer header string that 61 // incorporates the pid. RendererCallback(base::ProcessId pid,const std::string & output)62 void RendererCallback(base::ProcessId pid, const std::string& output) { 63 SetOutput(StringPrintf("Renderer PID %d", static_cast<int>(pid)), output); 64 } 65 66 private: 67 AboutTcmallocOutputs(); 68 ~AboutTcmallocOutputs(); 69 70 AboutTcmallocOutputsType outputs_; 71 72 friend struct DefaultSingletonTraits<AboutTcmallocOutputs>; 73 74 DISALLOW_COPY_AND_ASSIGN(AboutTcmallocOutputs); 75 }; 76 77 // Glue between the callback task and the method in the singleton. 78 void AboutTcmallocRendererCallback(base::ProcessId pid, 79 const std::string& output); 80 #endif 81 82 #endif // CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_ 83