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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/webui/jstemplate_builder.h"
#include <optional>
#include <string>
#include <string_view>
#include "base/check.h"
#include "base/json/json_writer.h"
#include "base/notreached.h"
#include "base/strings/string_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/template_expressions.h"
#include "ui/webui/resources/grit/webui_resources.h"
namespace webui {
namespace {
// Appends a script tag with a variable name |templateData| that has the JSON
// assigned to it.
void AppendJsonHtml(const base::Value::Dict& json, std::string* output) {
std::string javascript_string;
AppendJsonJS(json, &javascript_string, /*from_js_module=*/false);
// </ confuses the HTML parser because it could be a </script> tag. So we
// replace </ with <\/. The extra \ will be ignored by the JS engine.
base::ReplaceSubstringsAfterOffset(&javascript_string, 0, "</", "<\\/");
output->append("<script>");
output->append(javascript_string);
output->append("</script>");
}
// Appends the source for load_time_data.js in a script tag.
void AppendLoadTimeData(std::string* output) {
std::string load_time_data_src =
ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(
IDR_WEBUI_JS_LOAD_TIME_DATA_DEPRECATED_JS);
CHECK(!load_time_data_src.empty()) << "Unable to get loadTimeData src";
output->append("<script>");
output->append(load_time_data_src);
output->append("</script>");
}
} // namespace
std::string GetI18nTemplateHtml(std::string_view html_template,
const base::Value::Dict& json) {
ui::TemplateReplacements replacements;
ui::TemplateReplacementsFromDictionaryValue(json, &replacements);
std::string output =
ui::ReplaceTemplateExpressions(html_template, replacements);
AppendLoadTimeData(&output);
AppendJsonHtml(json, &output);
return output;
}
void AppendJsonJS(const base::Value::Dict& json,
std::string* output,
bool from_js_module) {
if (from_js_module) {
// If the script is being imported as a module, import |loadTimeData| in
// order to allow assigning the localized strings to loadTimeData.data.
output->append("import {loadTimeData} from ");
output->append("'//resources/js/load_time_data.js';\n");
#if BUILDFLAG(IS_CHROMEOS)
// Imported for the side effect of setting the |window.loadTimeData| global,
// which is relied on by ChromeOS Ash Tast Tests and some browser tests.
// See https://www.crbug.com/1395148.
output->append("import '//resources/ash/common/load_time_data.m.js';\n");
#endif // BUILDFLAG(IS_CHROMEOS)
}
std::optional<std::string> jstext = base::WriteJson(json);
CHECK(jstext);
output->append("loadTimeData.data = ");
output->append(*jstext);
output->append(";");
}
} // namespace webui
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