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// Copyright 2016 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 "content/public/browser/web_contents_media_capture_id.h"
#include <tuple>
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
namespace content {
const char kWebContentsCaptureScheme[] = "web-contents-media-stream://";
static char kEnableThrottlingFlag[] = "?throttling=auto";
bool WebContentsMediaCaptureId::operator<(
const WebContentsMediaCaptureId& other) const {
return std::tie(render_process_id, main_render_frame_id,
enable_auto_throttling) <
std::tie(other.render_process_id, other.main_render_frame_id,
other.enable_auto_throttling);
}
bool WebContentsMediaCaptureId::operator==(
const WebContentsMediaCaptureId& other) const {
return std::tie(render_process_id, main_render_frame_id,
enable_auto_throttling) ==
std::tie(other.render_process_id, other.main_render_frame_id,
other.enable_auto_throttling);
}
bool WebContentsMediaCaptureId::is_null() const {
return (render_process_id < 0) || (main_render_frame_id < 0);
}
std::string WebContentsMediaCaptureId::ToString() const {
std::string s = kWebContentsCaptureScheme;
s.append(base::Int64ToString(render_process_id));
s.append(":");
s.append(base::Int64ToString(main_render_frame_id));
if (enable_auto_throttling)
s.append(kEnableThrottlingFlag);
return s;
}
// static
WebContentsMediaCaptureId WebContentsMediaCaptureId::Parse(
const std::string& str) {
int render_process_id;
int main_render_frame_id;
if (!ExtractTabCaptureTarget(str, &render_process_id, &main_render_frame_id))
return WebContentsMediaCaptureId();
return WebContentsMediaCaptureId(render_process_id, main_render_frame_id,
IsAutoThrottlingOptionSet(str));
}
// static
bool WebContentsMediaCaptureId::IsWebContentsDeviceId(
const std::string& device_id) {
int ignored;
return ExtractTabCaptureTarget(device_id, &ignored, &ignored);
}
// static
bool WebContentsMediaCaptureId::ExtractTabCaptureTarget(
const std::string& device_id_param,
int* render_process_id,
int* main_render_frame_id) {
const std::string device_scheme = kWebContentsCaptureScheme;
if (!base::StartsWith(device_id_param, device_scheme,
base::CompareCase::SENSITIVE))
return false;
const std::string device_id = device_id_param.substr(device_scheme.size());
const size_t sep_pos = device_id.find(':');
if (sep_pos == std::string::npos)
return false;
const base::StringPiece component1(device_id.data(), sep_pos);
size_t end_pos = device_id.find('?');
if (end_pos == std::string::npos)
end_pos = device_id.length();
const base::StringPiece component2(device_id.data() + sep_pos + 1,
end_pos - sep_pos - 1);
return (base::StringToInt(component1, render_process_id) &&
base::StringToInt(component2, main_render_frame_id));
}
// static
bool WebContentsMediaCaptureId::IsAutoThrottlingOptionSet(
const std::string& device_id) {
if (!IsWebContentsDeviceId(device_id))
return false;
// Find the option part of the string and just do a naive string compare since
// there are no other options in the |device_id| to account for (at the time
// of this writing).
const size_t option_pos = device_id.find('?');
if (option_pos == std::string::npos)
return false;
const base::StringPiece component(device_id.data() + option_pos,
device_id.length() - option_pos);
return component.compare(kEnableThrottlingFlag) == 0;
}
} // namespace content
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