android_webview/native/aw_settings.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "android_webview/native/aw_settings.h"
   6
   7 #include "android_webview/browser/renderer_host/aw_render_view_host_ext.h"
   8 #include "android_webview/common/aw_content_client.h"
   9 #include "android_webview/native/aw_contents.h"
  10 #include "base/android/jni_android.h"
  11 #include "base/android/jni_string.h"
  12 #include "base/macros.h"
  13 #include "base/supports_user_data.h"
  14 #include "content/public/browser/navigation_controller.h"
  15 #include "content/public/browser/navigation_entry.h"
  16 #include "content/public/browser/render_view_host.h"
  17 #include "content/public/browser/web_contents.h"
  18 #include "content/public/common/renderer_preferences.h"
  19 #include "content/public/common/web_preferences.h"
  20 #include "jni/AwSettings_jni.h"
  21 #include "ui/gfx/font_render_params.h"
  22
  23 using base::android::ConvertJavaStringToUTF16;
  24 using base::android::ConvertUTF8ToJavaString;
  25 using base::android::ScopedJavaLocalRef;
  26 using content::RendererPreferences;
  27 using content::WebPreferences;
  28
  29 namespace android_webview {
  30
  31 namespace {
  32
  33 void PopulateFixedRendererPreferences(RendererPreferences* prefs) {
  34   prefs->tap_multiple_targets_strategy =
  35       content::TAP_MULTIPLE_TARGETS_STRATEGY_NONE;
  36
  37   // TODO(boliu): Deduplicate with chrome/ code.
  38   CR_DEFINE_STATIC_LOCAL(const gfx::FontRenderParams, params,
  39       (gfx::GetFontRenderParams(gfx::FontRenderParamsQuery(true), NULL)));
  40   prefs->should_antialias_text = params.antialiasing;
  41   prefs->use_subpixel_positioning = params.subpixel_positioning;
  42   prefs->hinting = params.hinting;
  43   prefs->use_autohinter = params.autohinter;
  44   prefs->use_bitmaps = params.use_bitmaps;
  45   prefs->subpixel_rendering = params.subpixel_rendering;
  46 }
  47
  48 void PopulateFixedWebPreferences(WebPreferences* web_prefs) {
  49   web_prefs->shrinks_standalone_images_to_fit = false;
  50   web_prefs->should_clear_document_background = false;
  51 }
  52
  53 };  // namespace
  54
  55 const void* kAwSettingsUserDataKey = &kAwSettingsUserDataKey;
  56
  57 class AwSettingsUserData : public base::SupportsUserData::Data {
  58  public:
  59   AwSettingsUserData(AwSettings* ptr) : settings_(ptr) {}
  60
  61   static AwSettings* GetSettings(content::WebContents* web_contents) {
  62     if (!web_contents)
  63       return NULL;
  64     AwSettingsUserData* data = reinterpret_cast<AwSettingsUserData*>(
  65         web_contents->GetUserData(kAwSettingsUserDataKey));
  66     return data ? data->settings_ : NULL;
  67   }
  68
  69  private:
  70   AwSettings* settings_;
  71 };
  72
  73 AwSettings::AwSettings(JNIEnv* env, jobject obj, jlong web_contents)
  74     : WebContentsObserver(
  75           reinterpret_cast<content::WebContents*>(web_contents)),
  76       renderer_prefs_initialized_(false),
  77       aw_settings_(env, obj) {
  78   reinterpret_cast<content::WebContents*>(web_contents)->
  79       SetUserData(kAwSettingsUserDataKey, new AwSettingsUserData(this));
  80 }
  81
  82 AwSettings::~AwSettings() {
  83   if (web_contents()) {
  84     web_contents()->SetUserData(kAwSettingsUserDataKey, NULL);
  85   }
  86
  87   JNIEnv* env = base::android::AttachCurrentThread();
  88   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
  89   jobject obj = scoped_obj.obj();
  90   if (!obj) return;
  91   Java_AwSettings_nativeAwSettingsGone(env, obj,
  92                                        reinterpret_cast<intptr_t>(this));
  93 }
  94
  95 void AwSettings::Destroy(JNIEnv* env, jobject obj) {
  96   delete this;
  97 }
  98
  99 AwSettings* AwSettings::FromWebContents(content::WebContents* web_contents) {
 100   return AwSettingsUserData::GetSettings(web_contents);
 101 }
 102
 103 AwRenderViewHostExt* AwSettings::GetAwRenderViewHostExt() {
 104   if (!web_contents()) return NULL;
 105   AwContents* contents = AwContents::FromWebContents(web_contents());
 106   if (!contents) return NULL;
 107   return contents->render_view_host_ext();
 108 }
 109
 110 void AwSettings::ResetScrollAndScaleState(JNIEnv* env, jobject obj) {
 111   AwRenderViewHostExt* rvhe = GetAwRenderViewHostExt();
 112   if (!rvhe) return;
 113   rvhe->ResetScrollAndScaleState();
 114 }
 115
 116 void AwSettings::UpdateEverything() {
 117   JNIEnv* env = base::android::AttachCurrentThread();
 118   CHECK(env);
 119   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
 120   jobject obj = scoped_obj.obj();
 121   if (!obj) return;
 122   // Grab the lock and call UpdateEverythingLocked.
 123   Java_AwSettings_updateEverything(env, obj);
 124 }
 125
 126 void AwSettings::UpdateEverythingLocked(JNIEnv* env, jobject obj) {
 127   UpdateInitialPageScaleLocked(env, obj);
 128   UpdateWebkitPreferencesLocked(env, obj);
 129   UpdateUserAgentLocked(env, obj);
 130   ResetScrollAndScaleState(env, obj);
 131   UpdateFormDataPreferencesLocked(env, obj);
 132   UpdateRendererPreferencesLocked(env, obj);
 133 }
 134
 135 void AwSettings::UpdateUserAgentLocked(JNIEnv* env, jobject obj) {
 136   if (!web_contents()) return;
 137
 138   ScopedJavaLocalRef<jstring> str =
 139       Java_AwSettings_getUserAgentLocked(env, obj);
 140   bool ua_overidden = str.obj() != NULL;
 141
 142   if (ua_overidden) {
 143     std::string override = base::android::ConvertJavaStringToUTF8(str);
 144     web_contents()->SetUserAgentOverride(override);
 145   }
 146
 147   const content::NavigationController& controller =
 148       web_contents()->GetController();
 149   for (int i = 0; i < controller.GetEntryCount(); ++i)
 150     controller.GetEntryAtIndex(i)->SetIsOverridingUserAgent(ua_overidden);
 151 }
 152
 153 void AwSettings::UpdateWebkitPreferencesLocked(JNIEnv* env, jobject obj) {
 154   if (!web_contents()) return;
 155   AwRenderViewHostExt* render_view_host_ext = GetAwRenderViewHostExt();
 156   if (!render_view_host_ext) return;
 157
 158   content::RenderViewHost* render_view_host =
 159       web_contents()->GetRenderViewHost();
 160   if (!render_view_host) return;
 161   render_view_host->OnWebkitPreferencesChanged();
 162 }
 163
 164 void AwSettings::UpdateInitialPageScaleLocked(JNIEnv* env, jobject obj) {
 165   AwRenderViewHostExt* rvhe = GetAwRenderViewHostExt();
 166   if (!rvhe) return;
 167
 168   float initial_page_scale_percent =
 169       Java_AwSettings_getInitialPageScalePercentLocked(env, obj);
 170   if (initial_page_scale_percent == 0) {
 171     rvhe->SetInitialPageScale(-1);
 172   } else {
 173     float dip_scale = static_cast<float>(
 174         Java_AwSettings_getDIPScaleLocked(env, obj));
 175     rvhe->SetInitialPageScale(initial_page_scale_percent / dip_scale / 100.0f);
 176   }
 177 }
 178
 179 void AwSettings::UpdateFormDataPreferencesLocked(JNIEnv* env, jobject obj) {
 180   if (!web_contents()) return;
 181   AwContents* contents = AwContents::FromWebContents(web_contents());
 182   if (!contents) return;
 183
 184   contents->SetSaveFormData(Java_AwSettings_getSaveFormDataLocked(env, obj));
 185 }
 186
 187 void AwSettings::UpdateRendererPreferencesLocked(JNIEnv* env, jobject obj) {
 188   if (!web_contents()) return;
 189
 190   bool update_prefs = false;
 191   RendererPreferences* prefs = web_contents()->GetMutableRendererPrefs();
 192
 193   if (!renderer_prefs_initialized_) {
 194     PopulateFixedRendererPreferences(prefs);
 195     renderer_prefs_initialized_ = true;
 196     update_prefs = true;
 197   }
 198
 199   bool video_overlay =
 200       Java_AwSettings_getVideoOverlayForEmbeddedVideoEnabledLocked(env, obj);
 201   if (video_overlay != prefs->use_video_overlay_for_embedded_encrypted_video) {
 202     prefs->use_video_overlay_for_embedded_encrypted_video = video_overlay;
 203     update_prefs = true;
 204   }
 205
 206   content::RenderViewHost* host = web_contents()->GetRenderViewHost();
 207   if (update_prefs && host)
 208     host->SyncRendererPrefs();
 209 }
 210
 211 void AwSettings::RenderViewCreated(content::RenderViewHost* render_view_host) {
 212   // A single WebContents can normally have 0 to many RenderViewHost instances
 213   // associated with it.
 214   // This is important since there is only one RenderViewHostExt instance per
 215   // WebContents (and not one RVHExt per RVH, as you might expect) and updating
 216   // settings via RVHExt only ever updates the 'current' RVH.
 217   // In android_webview we don't swap out the RVH on cross-site navigations, so
 218   // we shouldn't have to deal with the multiple RVH per WebContents case. That
 219   // in turn means that the newly created RVH is always the 'current' RVH
 220   // (since we only ever go from 0 to 1 RVH instances) and hence the DCHECK.
 221   DCHECK(web_contents()->GetRenderViewHost() == render_view_host);
 222
 223   UpdateEverything();
 224 }
 225
 226 void AwSettings::WebContentsDestroyed() {
 227   delete this;
 228 }
 229
 230 void AwSettings::PopulateWebPreferences(WebPreferences* web_prefs) {
 231   JNIEnv* env = base::android::AttachCurrentThread();
 232   CHECK(env);
 233   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
 234   jobject obj = scoped_obj.obj();
 235   if (!obj) return;
 236   // Grab the lock and call PopulateWebPreferencesLocked.
 237   Java_AwSettings_populateWebPreferences(
 238       env, obj, reinterpret_cast<jlong>(web_prefs));
 239 }
 240
 241 void AwSettings::PopulateWebPreferencesLocked(
 242     JNIEnv* env, jobject obj, jlong web_prefs_ptr) {
 243   AwRenderViewHostExt* render_view_host_ext = GetAwRenderViewHostExt();
 244   if (!render_view_host_ext) return;
 245
 246   WebPreferences* web_prefs = reinterpret_cast<WebPreferences*>(web_prefs_ptr);
 247   PopulateFixedWebPreferences(web_prefs);
 248
 249   web_prefs->text_autosizing_enabled =
 250       Java_AwSettings_getTextAutosizingEnabledLocked(env, obj);
 251
 252   int text_size_percent = Java_AwSettings_getTextSizePercentLocked(env, obj);
 253   if (web_prefs->text_autosizing_enabled) {
 254     web_prefs->font_scale_factor = text_size_percent / 100.0f;
 255     web_prefs->force_enable_zoom = text_size_percent >= 130;
 256     // Use the default zoom factor value when Text Autosizer is turned on.
 257     render_view_host_ext->SetTextZoomFactor(1);
 258   } else {
 259     web_prefs->force_enable_zoom = false;
 260     render_view_host_ext->SetTextZoomFactor(text_size_percent / 100.0f);
 261   }
 262
 263   web_prefs->standard_font_family_map[content::kCommonScript] =
 264       ConvertJavaStringToUTF16(
 265           Java_AwSettings_getStandardFontFamilyLocked(env, obj));
 266
 267   web_prefs->fixed_font_family_map[content::kCommonScript] =
 268       ConvertJavaStringToUTF16(
 269           Java_AwSettings_getFixedFontFamilyLocked(env, obj));
 270
 271   web_prefs->sans_serif_font_family_map[content::kCommonScript] =
 272       ConvertJavaStringToUTF16(
 273           Java_AwSettings_getSansSerifFontFamilyLocked(env, obj));
 274
 275   web_prefs->serif_font_family_map[content::kCommonScript] =
 276       ConvertJavaStringToUTF16(
 277           Java_AwSettings_getSerifFontFamilyLocked(env, obj));
 278
 279   web_prefs->cursive_font_family_map[content::kCommonScript] =
 280       ConvertJavaStringToUTF16(
 281           Java_AwSettings_getCursiveFontFamilyLocked(env, obj));
 282
 283   web_prefs->fantasy_font_family_map[content::kCommonScript] =
 284       ConvertJavaStringToUTF16(
 285           Java_AwSettings_getFantasyFontFamilyLocked(env, obj));
 286
 287   web_prefs->default_encoding = ConvertJavaStringToUTF8(
 288       Java_AwSettings_getDefaultTextEncodingLocked(env, obj));
 289
 290   web_prefs->minimum_font_size =
 291       Java_AwSettings_getMinimumFontSizeLocked(env, obj);
 292
 293   web_prefs->minimum_logical_font_size =
 294       Java_AwSettings_getMinimumLogicalFontSizeLocked(env, obj);
 295
 296   web_prefs->default_font_size =
 297       Java_AwSettings_getDefaultFontSizeLocked(env, obj);
 298
 299   web_prefs->default_fixed_font_size =
 300       Java_AwSettings_getDefaultFixedFontSizeLocked(env, obj);
 301
 302   // Blink's LoadsImagesAutomatically and ImagesEnabled must be
 303   // set cris-cross to Android's. See
 304   // https://code.google.com/p/chromium/issues/detail?id=224317#c26
 305   web_prefs->loads_images_automatically =
 306       Java_AwSettings_getImagesEnabledLocked(env, obj);
 307   web_prefs->images_enabled =
 308       Java_AwSettings_getLoadsImagesAutomaticallyLocked(env, obj);
 309
 310   web_prefs->javascript_enabled =
 311       Java_AwSettings_getJavaScriptEnabledLocked(env, obj);
 312
 313   web_prefs->allow_universal_access_from_file_urls =
 314       Java_AwSettings_getAllowUniversalAccessFromFileURLsLocked(env, obj);
 315
 316   web_prefs->allow_file_access_from_file_urls =
 317       Java_AwSettings_getAllowFileAccessFromFileURLsLocked(env, obj);
 318
 319   web_prefs->javascript_can_open_windows_automatically =
 320       Java_AwSettings_getJavaScriptCanOpenWindowsAutomaticallyLocked(env, obj);
 321
 322   web_prefs->supports_multiple_windows =
 323       Java_AwSettings_getSupportMultipleWindowsLocked(env, obj);
 324
 325   web_prefs->plugins_enabled =
 326       !Java_AwSettings_getPluginsDisabledLocked(env, obj);
 327
 328   web_prefs->application_cache_enabled =
 329       Java_AwSettings_getAppCacheEnabledLocked(env, obj);
 330
 331   web_prefs->local_storage_enabled =
 332       Java_AwSettings_getDomStorageEnabledLocked(env, obj);
 333
 334   web_prefs->databases_enabled =
 335       Java_AwSettings_getDatabaseEnabledLocked(env, obj);
 336
 337   web_prefs->wide_viewport_quirk = true;
 338   web_prefs->use_wide_viewport =
 339       Java_AwSettings_getUseWideViewportLocked(env, obj);
 340
 341   web_prefs->force_zero_layout_height =
 342       Java_AwSettings_getForceZeroLayoutHeightLocked(env, obj);
 343
 344   const bool zero_layout_height_disables_viewport_quirk =
 345       Java_AwSettings_getZeroLayoutHeightDisablesViewportQuirkLocked(env, obj);
 346   web_prefs->viewport_enabled = !(zero_layout_height_disables_viewport_quirk &&
 347                                   web_prefs->force_zero_layout_height);
 348
 349   web_prefs->double_tap_to_zoom_enabled =
 350       Java_AwSettings_supportsDoubleTapZoomLocked(env, obj);
 351
 352   web_prefs->initialize_at_minimum_page_scale =
 353       Java_AwSettings_getLoadWithOverviewModeLocked(env, obj);
 354
 355   web_prefs->user_gesture_required_for_media_playback =
 356       Java_AwSettings_getMediaPlaybackRequiresUserGestureLocked(env, obj);
 357
 358   ScopedJavaLocalRef<jstring> url =
 359       Java_AwSettings_getDefaultVideoPosterURLLocked(env, obj);
 360   web_prefs->default_video_poster_url = url.obj() ?
 361       GURL(ConvertJavaStringToUTF8(url)) : GURL();
 362
 363   bool support_quirks = Java_AwSettings_getSupportLegacyQuirksLocked(env, obj);
 364   // Please see the corresponding Blink settings for bug references.
 365   web_prefs->support_deprecated_target_density_dpi = support_quirks;
 366   web_prefs->use_legacy_background_size_shorthand_behavior = support_quirks;
 367   web_prefs->viewport_meta_layout_size_quirk = support_quirks;
 368   web_prefs->viewport_meta_merge_content_quirk = support_quirks;
 369   web_prefs->viewport_meta_non_user_scalable_quirk = support_quirks;
 370   web_prefs->viewport_meta_zero_values_quirk = support_quirks;
 371   web_prefs->clobber_user_agent_initial_scale_quirk = support_quirks;
 372   web_prefs->ignore_main_frame_overflow_hidden_quirk = support_quirks;
 373   web_prefs->report_screen_size_in_physical_pixels_quirk = support_quirks;
 374
 375   web_prefs->password_echo_enabled =
 376       Java_AwSettings_getPasswordEchoEnabledLocked(env, obj);
 377   web_prefs->spatial_navigation_enabled =
 378       Java_AwSettings_getSpatialNavigationLocked(env, obj);
 379
 380   bool enable_supported_hardware_accelerated_features =
 381       Java_AwSettings_getEnableSupportedHardwareAcceleratedFeaturesLocked(
 382                 env, obj);
 383
 384   bool accelerated_2d_canvas_enabled_by_switch =
 385       web_prefs->accelerated_2d_canvas_enabled;
 386   web_prefs->accelerated_2d_canvas_enabled = true;
 387   if (!accelerated_2d_canvas_enabled_by_switch ||
 388       !enable_supported_hardware_accelerated_features) {
 389     // Any canvas smaller than this will fallback to software. Abusing this
 390     // slightly to turn canvas off without changing
 391     // accelerated_2d_canvas_enabled, which also affects compositing mode.
 392     // Using 100M instead of max int to avoid overflows.
 393     web_prefs->minimum_accelerated_2d_canvas_size = 100 * 1000 * 1000;
 394   }
 395   web_prefs->experimental_webgl_enabled =
 396       web_prefs->experimental_webgl_enabled &&
 397       enable_supported_hardware_accelerated_features;
 398
 399   web_prefs->allow_displaying_insecure_content =
 400       Java_AwSettings_getAllowDisplayingInsecureContentLocked(env, obj);
 401   web_prefs->allow_running_insecure_content =
 402       Java_AwSettings_getAllowRunningInsecureContentLocked(env, obj);
 403
 404   web_prefs->disallow_fullscreen_for_non_media_elements = true;
 405   web_prefs->fullscreen_supported =
 406       Java_AwSettings_getFullscreenSupportedLocked(env, obj);
 407 }
 408
 409 static jlong Init(JNIEnv* env,
 410                   jobject obj,
 411                   jlong web_contents) {
 412   AwSettings* settings = new AwSettings(env, obj, web_contents);
 413   return reinterpret_cast<intptr_t>(settings);
 414 }
 415
 416 static jstring GetDefaultUserAgent(JNIEnv* env, jclass clazz) {
 417   return base::android::ConvertUTF8ToJavaString(env, GetUserAgent()).Release();
 418 }
 419
 420 bool RegisterAwSettings(JNIEnv* env) {
 421   return RegisterNativesImpl(env);
 422 }
 423
 424 }  // namespace android_webview