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// Copyright (c) 2012 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.
// A helper function for using JsTemplate. See jstemplate_builder.h for more
// info.
#include "chrome/common/jstemplate_builder.h"
#include "base/json/json_file_value_serializer.h"
#include "base/json/json_string_value_serializer.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "grit/common_resources.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
namespace {
// Non-zero when building version 2 templates. See UseVersion2 class.
int g_version2 = 0;
} // namespace
namespace jstemplate_builder {
UseVersion2::UseVersion2() {
g_version2++;
}
UseVersion2::~UseVersion2() {
g_version2--;
}
std::string GetTemplateHtml(const base::StringPiece& html_template,
const DictionaryValue* json,
const base::StringPiece& template_id) {
std::string output(html_template.data(), html_template.size());
AppendJsonHtml(json, &output);
AppendJsTemplateSourceHtml(&output);
AppendJsTemplateProcessHtml(template_id, &output);
return output;
}
std::string GetI18nTemplateHtml(const base::StringPiece& html_template,
const DictionaryValue* json) {
std::string output(html_template.data(), html_template.size());
AppendJsonHtml(json, &output);
AppendI18nTemplateSourceHtml(&output);
AppendI18nTemplateProcessHtml(&output);
return output;
}
std::string GetTemplatesHtml(const base::StringPiece& html_template,
const DictionaryValue* json,
const base::StringPiece& template_id) {
std::string output(html_template.data(), html_template.size());
AppendI18nTemplateSourceHtml(&output);
AppendJsTemplateSourceHtml(&output);
AppendJsonHtml(json, &output);
AppendI18nTemplateProcessHtml(&output);
AppendJsTemplateProcessHtml(template_id, &output);
return output;
}
void AppendJsonHtml(const DictionaryValue* json, std::string* output) {
std::string javascript_string;
jstemplate_builder::AppendJsonJS(json, &javascript_string);
// </ confuses the HTML parser because it could be a </script> tag. So we
// replace </ with <\/. The extra \ will be ignored by the JS engine.
ReplaceSubstringsAfterOffset(&javascript_string, 0, "</", "<\\/");
output->append("<script>");
output->append(javascript_string);
output->append("</script>");
}
void AppendJsonJS(const DictionaryValue* json, std::string* output) {
// Convert the template data to a json string.
DCHECK(json) << "must include json data structure";
std::string jstext;
JSONStringValueSerializer serializer(&jstext);
serializer.Serialize(*json);
output->append(g_version2 ? "loadTimeData.data = " : "var templateData = ");
output->append(jstext);
output->append(";");
}
void AppendJsTemplateSourceHtml(std::string* output) {
// fetch and cache the pointer of the jstemplate resource source text.
static const base::StringPiece jstemplate_src(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_JSTEMPLATE_JS, ui::SCALE_FACTOR_NONE));
if (jstemplate_src.empty()) {
NOTREACHED() << "Unable to get jstemplate src";
return;
}
output->append("<script>");
output->append(jstemplate_src.data(), jstemplate_src.size());
output->append("</script>");
}
void AppendJsTemplateProcessHtml(const base::StringPiece& template_id,
std::string* output) {
output->append("<script>");
output->append("var tp = document.getElementById('");
output->append(template_id.data(), template_id.size());
output->append("');");
output->append("jstProcess(new JsEvalContext(templateData), tp);");
output->append("</script>");
}
void AppendI18nTemplateSourceHtml(std::string* output) {
// fetch and cache the pointer of the jstemplate resource source text.
static const base::StringPiece i18n_template_src(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_I18N_TEMPLATE_JS, ui::SCALE_FACTOR_NONE));
static const base::StringPiece i18n_template2_src(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_I18N_TEMPLATE2_JS, ui::SCALE_FACTOR_NONE));
const base::StringPiece* template_src = g_version2 ?
&i18n_template2_src : &i18n_template_src;
if (template_src->empty()) {
NOTREACHED() << "Unable to get i18n template src";
return;
}
output->append("<script>");
output->append(template_src->data(), template_src->size());
output->append("</script>");
}
void AppendI18nTemplateProcessHtml(std::string* output) {
if (g_version2)
return;
static const base::StringPiece i18n_process_src(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_I18N_PROCESS_JS, ui::SCALE_FACTOR_NONE));
if (i18n_process_src.empty()) {
NOTREACHED() << "Unable to get i18n process src";
return;
}
output->append("<script>");
output->append(i18n_process_src.data(), i18n_process_src.size());
output->append("</script>");
}
} // namespace jstemplate_builder
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