ios/public/provider/chrome/browser/font_size_java_script_feature.mm

// Copyright 2021 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.

#import "ios/public/provider/chrome/browser/font_size_java_script_feature.h"

#include "base/values.h"
#import "ios/web/public/js_messaging/web_frame.h"
#include "ios/web/public/js_messaging/web_frames_manager.h"
#import "ios/web/public/web_state.h"

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

namespace {
const char kFontSizeScript[] = "font_size_js";
}  // namespace

// static
FontSizeJavaScriptFeature* FontSizeJavaScriptFeature::GetInstance() {
  static base::NoDestructor<FontSizeJavaScriptFeature> instance;
  return instance.get();
}

void FontSizeJavaScriptFeature::AdjustFontSize(web::WebState* web_state,
                                               int size) {
  for (web::WebFrame* frame :
       web_state->GetWebFramesManager()->GetAllWebFrames()) {
    AdjustFontSize(frame, size);
  }
}

void FontSizeJavaScriptFeature::AdjustFontSize(web::WebFrame* web_frame,
                                               int size) {
  std::vector<base::Value> parameters;
  parameters.push_back(base::Value(size));
  CallJavaScriptFunction(web_frame, "font_size.adjustFontSize", parameters);
}

FontSizeJavaScriptFeature::FontSizeJavaScriptFeature()
    : web::JavaScriptFeature(
          web::JavaScriptFeature::ContentWorld::kAnyContentWorld,
          {FeatureScript::CreateWithFilename(
              kFontSizeScript,
              FeatureScript::InjectionTime::kDocumentStart,
              FeatureScript::TargetFrames::kAllFrames)}) {}
FontSizeJavaScriptFeature::~FontSizeJavaScriptFeature() = default;