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 = static_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,
  74                        jobject obj,
  75                        content::WebContents* web_contents)
  76     : WebContentsObserver(web_contents),
  77       renderer_prefs_initialized_(false),
  78       aw_settings_(env, obj) {
  79   web_contents->SetUserData(kAwSettingsUserDataKey,
  80                             new AwSettingsUserData(this));
  81 }
  82
  83 AwSettings::~AwSettings() {
  84   if (web_contents()) {
  85     web_contents()->SetUserData(kAwSettingsUserDataKey, NULL);
  86   }
  87
  88   JNIEnv* env = base::android::AttachCurrentThread();
  89   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
  90   jobject obj = scoped_obj.obj();
  91   if (!obj) return;
  92   Java_AwSettings_nativeAwSettingsGone(env, obj,
  93                                        reinterpret_cast<intptr_t>(this));
  94 }
  95
  96 void AwSettings::Destroy(JNIEnv* env, jobject obj) {
  97   delete this;
  98 }
  99
 100 AwSettings* AwSettings::FromWebContents(content::WebContents* web_contents) {
 101   return AwSettingsUserData::GetSettings(web_contents);
 102 }
 103
 104 AwRenderViewHostExt* AwSettings::GetAwRenderViewHostExt() {
 105   if (!web_contents()) return NULL;
 106   AwContents* contents = AwContents::FromWebContents(web_contents());
 107   if (!contents) return NULL;
 108   return contents->render_view_host_ext();
 109 }
 110
 111 void AwSettings::ResetScrollAndScaleState(JNIEnv* env, jobject obj) {
 112   AwRenderViewHostExt* rvhe = GetAwRenderViewHostExt();
 113   if (!rvhe) return;
 114   rvhe->ResetScrollAndScaleState();
 115 }
 116
 117 void AwSettings::UpdateEverything() {
 118   JNIEnv* env = base::android::AttachCurrentThread();
 119   CHECK(env);
 120   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
 121   jobject obj = scoped_obj.obj();
 122   if (!obj) return;
 123   // Grab the lock and call UpdateEverythingLocked.
 124   Java_AwSettings_updateEverything(env, obj);
 125 }
 126
 127 void AwSettings::UpdateEverythingLocked(JNIEnv* env, jobject obj) {
 128   UpdateInitialPageScaleLocked(env, obj);
 129   UpdateWebkitPreferencesLocked(env, obj);
 130   UpdateUserAgentLocked(env, obj);
 131   ResetScrollAndScaleState(env, obj);
 132   UpdateFormDataPreferencesLocked(env, obj);
 133   UpdateRendererPreferencesLocked(env, obj);
 134   UpdateOffscreenPreRasterLocked(env, obj);
 135 }
 136
 137 void AwSettings::UpdateUserAgentLocked(JNIEnv* env, jobject obj) {
 138   if (!web_contents()) return;
 139
 140   ScopedJavaLocalRef<jstring> str =
 141       Java_AwSettings_getUserAgentLocked(env, obj);
 142   bool ua_overidden = str.obj() != NULL;
 143
 144   if (ua_overidden) {
 145     std::string override = base::android::ConvertJavaStringToUTF8(str);
 146     web_contents()->SetUserAgentOverride(override);
 147   }
 148
 149   const content::NavigationController& controller =
 150       web_contents()->GetController();
 151   for (int i = 0; i < controller.GetEntryCount(); ++i)
 152     controller.GetEntryAtIndex(i)->SetIsOverridingUserAgent(ua_overidden);
 153 }
 154
 155 void AwSettings::UpdateWebkitPreferencesLocked(JNIEnv* env, jobject obj) {
 156   if (!web_contents()) return;
 157   AwRenderViewHostExt* render_view_host_ext = GetAwRenderViewHostExt();
 158   if (!render_view_host_ext) return;
 159
 160   content::RenderViewHost* render_view_host =
 161       web_contents()->GetRenderViewHost();
 162   if (!render_view_host) return;
 163   render_view_host->OnWebkitPreferencesChanged();
 164 }
 165
 166 void AwSettings::UpdateInitialPageScaleLocked(JNIEnv* env, jobject obj) {
 167   AwRenderViewHostExt* rvhe = GetAwRenderViewHostExt();
 168   if (!rvhe) return;
 169
 170   float initial_page_scale_percent =
 171       Java_AwSettings_getInitialPageScalePercentLocked(env, obj);
 172   if (initial_page_scale_percent == 0) {
 173     rvhe->SetInitialPageScale(-1);
 174   } else {
 175     float dip_scale = static_cast<float>(
 176         Java_AwSettings_getDIPScaleLocked(env, obj));
 177     rvhe->SetInitialPageScale(initial_page_scale_percent / dip_scale / 100.0f);
 178   }
 179 }
 180
 181 void AwSettings::UpdateFormDataPreferencesLocked(JNIEnv* env, jobject obj) {
 182   if (!web_contents()) return;
 183   AwContents* contents = AwContents::FromWebContents(web_contents());
 184   if (!contents) return;
 185
 186   contents->SetSaveFormData(Java_AwSettings_getSaveFormDataLocked(env, obj));
 187 }
 188
 189 void AwSettings::UpdateRendererPreferencesLocked(JNIEnv* env, jobject obj) {
 190   if (!web_contents()) return;
 191
 192   bool update_prefs = false;
 193   RendererPreferences* prefs = web_contents()->GetMutableRendererPrefs();
 194
 195   if (!renderer_prefs_initialized_) {
 196     PopulateFixedRendererPreferences(prefs);
 197     renderer_prefs_initialized_ = true;
 198     update_prefs = true;
 199   }
 200
 201   bool video_overlay =
 202       Java_AwSettings_getVideoOverlayForEmbeddedVideoEnabledLocked(env, obj);
 203   if (video_overlay != prefs->use_video_overlay_for_embedded_encrypted_video) {
 204     prefs->use_video_overlay_for_embedded_encrypted_video = video_overlay;
 205     update_prefs = true;
 206   }
 207
 208   content::RenderViewHost* host = web_contents()->GetRenderViewHost();
 209   if (update_prefs && host)
 210     host->SyncRendererPrefs();
 211 }
 212
 213 void AwSettings::UpdateOffscreenPreRasterLocked(JNIEnv* env, jobject obj) {
 214   AwContents* contents = AwContents::FromWebContents(web_contents());
 215   if (contents) {
 216     contents->SetOffscreenPreRaster(
 217         Java_AwSettings_getOffscreenPreRasterLocked(env, obj));
 218   }
 219 }
 220
 221 void AwSettings::RenderViewCreated(content::RenderViewHost* render_view_host) {
 222   // A single WebContents can normally have 0 to many RenderViewHost instances
 223   // associated with it.
 224   // This is important since there is only one RenderViewHostExt instance per
 225   // WebContents (and not one RVHExt per RVH, as you might expect) and updating
 226   // settings via RVHExt only ever updates the 'current' RVH.
 227   // In android_webview we don't swap out the RVH on cross-site navigations, so
 228   // we shouldn't have to deal with the multiple RVH per WebContents case. That
 229   // in turn means that the newly created RVH is always the 'current' RVH
 230   // (since we only ever go from 0 to 1 RVH instances) and hence the DCHECK.
 231   DCHECK_EQ(render_view_host, web_contents()->GetRenderViewHost());
 232
 233   UpdateEverything();
 234 }
 235
 236 void AwSettings::WebContentsDestroyed() {
 237   delete this;
 238 }
 239
 240 void AwSettings::PopulateWebPreferences(WebPreferences* web_prefs) {
 241   JNIEnv* env = base::android::AttachCurrentThread();
 242   CHECK(env);
 243   ScopedJavaLocalRef<jobject> scoped_obj = aw_settings_.get(env);
 244   jobject obj = scoped_obj.obj();
 245   if (!obj) return;
 246   // Grab the lock and call PopulateWebPreferencesLocked.
 247   Java_AwSettings_populateWebPreferences(
 248       env, obj, reinterpret_cast<jlong>(web_prefs));
 249 }
 250
 251 void AwSettings::PopulateWebPreferencesLocked(
 252     JNIEnv* env, jobject obj, jlong web_prefs_ptr) {
 253   AwRenderViewHostExt* render_view_host_ext = GetAwRenderViewHostExt();
 254   if (!render_view_host_ext) return;
 255
 256   WebPreferences* web_prefs = reinterpret_cast<WebPreferences*>(web_prefs_ptr);
 257   PopulateFixedWebPreferences(web_prefs);
 258
 259   web_prefs->text_autosizing_enabled =
 260       Java_AwSettings_getTextAutosizingEnabledLocked(env, obj);
 261
 262   int text_size_percent = Java_AwSettings_getTextSizePercentLocked(env, obj);
 263   if (web_prefs->text_autosizing_enabled) {
 264     web_prefs->font_scale_factor = text_size_percent / 100.0f;
 265     web_prefs->force_enable_zoom = text_size_percent >= 130;
 266     // Use the default zoom factor value when Text Autosizer is turned on.
 267     render_view_host_ext->SetTextZoomFactor(1);
 268   } else {
 269     web_prefs->force_enable_zoom = false;
 270     render_view_host_ext->SetTextZoomFactor(text_size_percent / 100.0f);
 271   }
 272
 273   web_prefs->standard_font_family_map[content::kCommonScript] =
 274       ConvertJavaStringToUTF16(
 275           Java_AwSettings_getStandardFontFamilyLocked(env, obj));
 276
 277   web_prefs->fixed_font_family_map[content::kCommonScript] =
 278       ConvertJavaStringToUTF16(
 279           Java_AwSettings_getFixedFontFamilyLocked(env, obj));
 280
 281   web_prefs->sans_serif_font_family_map[content::kCommonScript] =
 282       ConvertJavaStringToUTF16(
 283           Java_AwSettings_getSansSerifFontFamilyLocked(env, obj));
 284
 285   web_prefs->serif_font_family_map[content::kCommonScript] =
 286       ConvertJavaStringToUTF16(
 287           Java_AwSettings_getSerifFontFamilyLocked(env, obj));
 288
 289   web_prefs->cursive_font_family_map[content::kCommonScript] =
 290       ConvertJavaStringToUTF16(
 291           Java_AwSettings_getCursiveFontFamilyLocked(env, obj));
 292
 293   web_prefs->fantasy_font_family_map[content::kCommonScript] =
 294       ConvertJavaStringToUTF16(
 295           Java_AwSettings_getFantasyFontFamilyLocked(env, obj));
 296
 297   web_prefs->default_encoding = ConvertJavaStringToUTF8(
 298       Java_AwSettings_getDefaultTextEncodingLocked(env, obj));
 299
 300   web_prefs->minimum_font_size =
 301       Java_AwSettings_getMinimumFontSizeLocked(env, obj);
 302
 303   web_prefs->minimum_logical_font_size =
 304       Java_AwSettings_getMinimumLogicalFontSizeLocked(env, obj);
 305
 306   web_prefs->default_font_size =
 307       Java_AwSettings_getDefaultFontSizeLocked(env, obj);
 308
 309   web_prefs->default_fixed_font_size =
 310       Java_AwSettings_getDefaultFixedFontSizeLocked(env, obj);
 311
 312   // Blink's LoadsImagesAutomatically and ImagesEnabled must be
 313   // set cris-cross to Android's. See
 314   // https://code.google.com/p/chromium/issues/detail?id=224317#c26
 315   web_prefs->loads_images_automatically =
 316       Java_AwSettings_getImagesEnabledLocked(env, obj);
 317   web_prefs->images_enabled =
 318       Java_AwSettings_getLoadsImagesAutomaticallyLocked(env, obj);
 319
 320   web_prefs->javascript_enabled =
 321       Java_AwSettings_getJavaScriptEnabledLocked(env, obj);
 322
 323   web_prefs->allow_universal_access_from_file_urls =
 324       Java_AwSettings_getAllowUniversalAccessFromFileURLsLocked(env, obj);
 325
 326   web_prefs->allow_file_access_from_file_urls =
 327       Java_AwSettings_getAllowFileAccessFromFileURLsLocked(env, obj);
 328
 329   web_prefs->javascript_can_open_windows_automatically =
 330       Java_AwSettings_getJavaScriptCanOpenWindowsAutomaticallyLocked(env, obj);
 331
 332   web_prefs->supports_multiple_windows =
 333       Java_AwSettings_getSupportMultipleWindowsLocked(env, obj);
 334
 335   web_prefs->plugins_enabled =
 336       !Java_AwSettings_getPluginsDisabledLocked(env, obj);
 337
 338   web_prefs->application_cache_enabled =
 339       Java_AwSettings_getAppCacheEnabledLocked(env, obj);
 340
 341   web_prefs->local_storage_enabled =
 342       Java_AwSettings_getDomStorageEnabledLocked(env, obj);
 343
 344   web_prefs->databases_enabled =
 345       Java_AwSettings_getDatabaseEnabledLocked(env, obj);
 346
 347   web_prefs->wide_viewport_quirk = true;
 348   web_prefs->use_wide_viewport =
 349       Java_AwSettings_getUseWideViewportLocked(env, obj);
 350
 351   web_prefs->force_zero_layout_height =
 352       Java_AwSettings_getForceZeroLayoutHeightLocked(env, obj);
 353
 354   const bool zero_layout_height_disables_viewport_quirk =
 355       Java_AwSettings_getZeroLayoutHeightDisablesViewportQuirkLocked(env, obj);
 356   web_prefs->viewport_enabled = !(zero_layout_height_disables_viewport_quirk &&
 357                                   web_prefs->force_zero_layout_height);
 358
 359   web_prefs->double_tap_to_zoom_enabled =
 360       Java_AwSettings_supportsDoubleTapZoomLocked(env, obj);
 361
 362   web_prefs->initialize_at_minimum_page_scale =
 363       Java_AwSettings_getLoadWithOverviewModeLocked(env, obj);
 364
 365   web_prefs->user_gesture_required_for_media_playback =
 366       Java_AwSettings_getMediaPlaybackRequiresUserGestureLocked(env, obj);
 367
 368   ScopedJavaLocalRef<jstring> url =
 369       Java_AwSettings_getDefaultVideoPosterURLLocked(env, obj);
 370   web_prefs->default_video_poster_url = url.obj() ?
 371       GURL(ConvertJavaStringToUTF8(url)) : GURL();
 372
 373   bool support_quirks = Java_AwSettings_getSupportLegacyQuirksLocked(env, obj);
 374   // Please see the corresponding Blink settings for bug references.
 375   web_prefs->support_deprecated_target_density_dpi = support_quirks;
 376   web_prefs->use_legacy_background_size_shorthand_behavior = support_quirks;
 377   web_prefs->viewport_meta_layout_size_quirk = support_quirks;
 378   web_prefs->viewport_meta_merge_content_quirk = support_quirks;
 379   web_prefs->viewport_meta_non_user_scalable_quirk = support_quirks;
 380   web_prefs->viewport_meta_zero_values_quirk = support_quirks;
 381   web_prefs->clobber_user_agent_initial_scale_quirk = support_quirks;
 382   web_prefs->ignore_main_frame_overflow_hidden_quirk = support_quirks;
 383   web_prefs->report_screen_size_in_physical_pixels_quirk = support_quirks;
 384
 385   web_prefs->password_echo_enabled =
 386       Java_AwSettings_getPasswordEchoEnabledLocked(env, obj);
 387   web_prefs->spatial_navigation_enabled =
 388       Java_AwSettings_getSpatialNavigationLocked(env, obj);
 389
 390   bool enable_supported_hardware_accelerated_features =
 391       Java_AwSettings_getEnableSupportedHardwareAcceleratedFeaturesLocked(
 392                 env, obj);
 393
 394   bool accelerated_2d_canvas_enabled_by_switch =
 395       web_prefs->accelerated_2d_canvas_enabled;
 396   web_prefs->accelerated_2d_canvas_enabled = true;
 397   if (!accelerated_2d_canvas_enabled_by_switch ||
 398       !enable_supported_hardware_accelerated_features) {
 399     // Any canvas smaller than this will fallback to software. Abusing this
 400     // slightly to turn canvas off without changing
 401     // accelerated_2d_canvas_enabled, which also affects compositing mode.
 402     // Using 100M instead of max int to avoid overflows.
 403     web_prefs->minimum_accelerated_2d_canvas_size = 100 * 1000 * 1000;
 404   }
 405   web_prefs->experimental_webgl_enabled =
 406       web_prefs->experimental_webgl_enabled &&
 407       enable_supported_hardware_accelerated_features;
 408
 409   web_prefs->allow_displaying_insecure_content =
 410       Java_AwSettings_getAllowDisplayingInsecureContentLocked(env, obj);
 411   web_prefs->allow_running_insecure_content =
 412       Java_AwSettings_getAllowRunningInsecureContentLocked(env, obj);
 413
 414   web_prefs->fullscreen_supported =
 415       Java_AwSettings_getFullscreenSupportedLocked(env, obj);
 416 }
 417
 418 static jlong Init(JNIEnv* env,
 419                   jobject obj,
 420                   jobject web_contents) {
 421   content::WebContents* contents = content::WebContents::FromJavaWebContents(
 422       web_contents);
 423   AwSettings* settings = new AwSettings(env, obj, contents);
 424   return reinterpret_cast<intptr_t>(settings);
 425 }
 426
 427 static jstring GetDefaultUserAgent(JNIEnv* env, jclass clazz) {
 428   return base::android::ConvertUTF8ToJavaString(env, GetUserAgent()).Release();
 429 }
 430
 431 bool RegisterAwSettings(JNIEnv* env) {
 432   return RegisterNativesImpl(env);
 433 }
 434
 435 }  // namespace android_webview