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// Copyright 2018 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/browser/accessibility/captioning_controller.h"
#include "base/android/jni_string.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/android/content_jni_headers/CaptioningController_jni.h"
#include "third_party/blink/public/common/web_preferences/web_preferences.h"
using base::android::AttachCurrentThread;
using base::android::ConvertJavaStringToUTF8;
using base::android::JavaParamRef;
using base::android::JavaRef;
using base::android::ScopedJavaLocalRef;
namespace content {
namespace {
int GetRenderProcessIdFromRenderViewHost(RenderViewHost* host) {
DCHECK(host);
RenderProcessHost* render_process = host->GetProcess();
DCHECK(render_process);
if (render_process->IsInitializedAndNotDead())
return render_process->GetProcess().Handle();
return 0;
}
// Adds !important to all captions styles. They should always override any
// styles added by the video author or by a user stylesheet. This is because in
// Chrome, there is an option to turn off captions styles, so any time the
// captions are on, the styles should take priority.
std::string AddCSSImportant(std::string css_string) {
return css_string + " !important";
}
} // namespace
CaptioningController::CaptioningController(JNIEnv* env,
const JavaRef<jobject>& obj,
WebContents* web_contents)
: WebContentsObserver(web_contents), java_ref_(env, obj) {}
CaptioningController::~CaptioningController() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (!obj.is_null())
Java_CaptioningController_onDestroy(env, obj);
}
void CaptioningController::RenderViewReady() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (!obj.is_null())
Java_CaptioningController_onRenderProcessChange(env, obj);
}
void CaptioningController::RenderViewHostChanged(RenderViewHost* old_host,
RenderViewHost* new_host) {
int old_pid = 0;
if (old_host) {
old_pid = GetRenderProcessIdFromRenderViewHost(old_host);
}
int new_pid = GetRenderProcessIdFromRenderViewHost(new_host);
if (new_pid != old_pid) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (!obj.is_null())
Java_CaptioningController_onRenderProcessChange(env, obj);
}
}
void CaptioningController::WebContentsDestroyed() {
delete this;
}
void CaptioningController::SetTextTrackSettings(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jboolean textTracksEnabled,
const JavaParamRef<jstring>& textTrackBackgroundColor,
const JavaParamRef<jstring>& textTrackFontFamily,
const JavaParamRef<jstring>& textTrackFontStyle,
const JavaParamRef<jstring>& textTrackFontVariant,
const JavaParamRef<jstring>& textTrackTextColor,
const JavaParamRef<jstring>& textTrackTextShadow,
const JavaParamRef<jstring>& textTrackTextSize) {
auto web_prefs = web_contents()->GetOrCreateWebPreferences();
web_prefs.text_tracks_enabled = textTracksEnabled;
web_prefs.text_track_background_color =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackBackgroundColor));
web_prefs.text_track_font_family =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackFontFamily));
web_prefs.text_track_font_style =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackFontStyle));
web_prefs.text_track_font_variant =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackFontVariant));
web_prefs.text_track_text_color =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackTextColor));
web_prefs.text_track_text_shadow =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackTextShadow));
web_prefs.text_track_text_size =
AddCSSImportant(ConvertJavaStringToUTF8(env, textTrackTextSize));
web_contents()->SetWebPreferences(web_prefs);
}
jlong JNI_CaptioningController_Init(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& jweb_contents) {
WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
WebContents::FromJavaWebContents(jweb_contents));
CHECK(web_contents);
return reinterpret_cast<intptr_t>(
new CaptioningController(env, obj, web_contents));
}
} // namespace content
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