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// 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.
#ifndef CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_
#define CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_
#include <map>
#include <string>
#include <vector>
#include "base/process.h"
#include "base/stringprintf.h"
#include "build/build_config.h" // USE_TCMALLOC
template <typename T> struct DefaultSingletonTraits;
class GURL;
namespace content {
class BrowserContext;
}
// Returns true if the given URL will be handled by the browser about handler.
// Nowadays, these go through the webui, so the return is always false.
// Either way, |url| will be processed by URLFixerUpper::FixupURL, which
// replaces the about: scheme with chrome:// for all about:foo URLs except
// "about:blank".
// Some |url| host values will be replaced with their respective redirects.
//
// This is used by BrowserURLHandler.
bool WillHandleBrowserAboutURL(GURL* url,
content::BrowserContext* browser_context);
// We have a few magic commands that don't cause navigations, but rather pop up
// dialogs. This function handles those cases, and returns true if so. In this
// case, normal tab navigation should be skipped.
bool HandleNonNavigationAboutURL(const GURL& url);
// Gets the paths that are shown in chrome://chrome-urls.
std::vector<std::string> ChromePaths();
#if defined(USE_TCMALLOC)
// A map of header strings (e.g. "Browser", "Renderer PID 123")
// to the tcmalloc output collected for each process.
typedef std::map<std::string, std::string> AboutTcmallocOutputsType;
class AboutTcmallocOutputs {
public:
// Returns the singleton instance.
static AboutTcmallocOutputs* GetInstance();
AboutTcmallocOutputsType* outputs() { return &outputs_; }
// Records the output for a specified header string.
void SetOutput(const std::string& header, const std::string& output) {
outputs_[header] = output;
}
// Callback for output returned from renderer processes. Adds
// the output for a canonical renderer header string that
// incorporates the pid.
void RendererCallback(base::ProcessId pid, const std::string& output) {
SetOutput(
base::StringPrintf("Renderer PID %d", static_cast<int>(pid)), output);
}
private:
AboutTcmallocOutputs();
~AboutTcmallocOutputs();
AboutTcmallocOutputsType outputs_;
friend struct DefaultSingletonTraits<AboutTcmallocOutputs>;
DISALLOW_COPY_AND_ASSIGN(AboutTcmallocOutputs);
};
// Glue between the callback task and the method in the singleton.
void AboutTcmallocRendererCallback(base::ProcessId pid,
const std::string& output);
#endif // defined(USE_TCMALLOC)
#endif // CHROME_BROWSER_BROWSER_ABOUT_HANDLER_H_
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