make tab preview based on idle mouse time

- Fix #8860
- Auditors: @bsclifton, @bradleyrichter

Author: cezaraugusto

app/common/constants/settingsEnums.js

@@ -27,6 +27,13 @@ const tabCloseAction = {
   PARENT: 'parent'
 }
 
+// timing in milliseconds
+const tabPreviewTiming = {
+  LONG: 2000,
+  NORMAL: 1000,
+  SHORT: 500
+}
+
 const fullscreenOption = {
   ALWAYS_ASK: 'alwaysAsk',
   ALWAYS_ALLOW: 'alwaysAllow'
@@ -42,6 +49,7 @@ module.exports = {
   newTabMode,
   bookmarksToolbarMode,
   tabCloseAction,
+  tabPreviewTiming,
   fullscreenOption,
   autoplayOption
 }

app/extensions/brave/locales/en-US/preferences.properties

@@ -192,6 +192,10 @@ paintTabs=Show tabs in page theme color
 tabsPerTabPage=Number of tabs per tab set:
 tabCloseAction=When closing an active tab:
 showTabPreviews=Show tab previews on hover
+tabPreviewTiming=Time to wait before previewing a tab
+long=Long
+normal=Normal
+short=Short
 showHistoryMatches=Show history matches
 showBookmarkMatches=Show bookmark matches
 showOpenedTabMatches=Show tab matches

app/renderer/components/tabs/tab.js

@@ -26,6 +26,7 @@ const windowStore = require('../../../../js/stores/windowStore')
 // Constants
 const dragTypes = require('../../../../js/constants/dragTypes')
 const messages = require('../../../../js/constants/messages')
+const settings = require('../../../../js/constants/settings')
 
 // Styles
 const styles = require('../styles/tab')
@@ -42,10 +43,12 @@ const {getTabBreakpoint, tabUpdateFrameRate} = require('../../lib/tabUtil')
 const {isWindows} = require('../../../common/lib/platformUtil')
 const {getCurrentWindowId} = require('../../currentWindow')
 const UrlUtil = require('../../../../js/lib/urlutil')
+const getSetting = require('../../../../js/settings').getSetting
 
 class Tab extends ImmutableComponent {
   constructor () {
     super()
+    this.onMouseMove = this.onMouseMove.bind(this)
     this.onMouseEnter = this.onMouseEnter.bind(this)
     this.onMouseLeave = this.onMouseLeave.bind(this)
     this.onUpdateTabSize = this.onUpdateTabSize.bind(this)
@@ -163,27 +166,40 @@ class Tab extends ImmutableComponent {
     !this.props.frame.get('provisionalLocation').startsWith('chrome-extension://mnojpmjdmbbfmejpflffifhffcmidifd/'))
   }
 
-  onMouseLeave () {
-    if (this.props.previewTabs) {
-      window.clearTimeout(this.hoverTimeout)
+  onMouseLeave (e) {
+    clearTimeout(this.mouseTimeout)
+    const tabAsRelatedTarget = /^tab_/i.test(e.relatedTarget.classList)
+
+    // We are taking for granted that user hovering over
+    // another tab means that he wants to sequentially
+    // preview a set of tabs, so if previewMode was
+    // set by defined mouse idle time, only cancel previewMode
+    // if the next event doesn't happen in another tab.
+    if (this.props.previewTabs && !tabAsRelatedTarget) {
       windowActions.setPreviewFrame(null)
+      windowActions.setPreviewMode(false)
     }
     windowActions.setTabHoverState(this.props.frame.get('key'), false)
   }
 
   onMouseEnter (e) {
-    // relatedTarget inside mouseenter checks which element before this event was the pointer on
-    // if this element has a tab-like class, then it's likely that the user was previewing
-    // a sequency of tabs. Called here as previewMode.
-    const previewMode = /tab(?!pages)/i.test(e.relatedTarget.classList)
+    this.mouseTimeout = null
+    if (this.props.previewMode) {
+      windowActions.setPreviewFrame(this.props.frame.get('key'))
+    }
+    windowActions.setTabHoverState(this.props.frame.get('key'), true)
+  }
 
-    // If user isn't in previewMode, we add a bit of delay to avoid tab from flashing out
-    // as reported here: https://github.com/brave/browser-laptop/issues/1434
+  onMouseMove (e) {
+    // previewMode is only triggered if mouse is idle
+    // over a tab based on timing defined in prefs->tabs
     if (this.props.previewTabs) {
-      this.hoverTimeout =
-        window.setTimeout(windowActions.setPreviewFrame.bind(null, this.props.frame.get('key')), previewMode ? 0 : 200)
+      clearTimeout(this.mouseTimeout)
+      this.mouseTimeout = setTimeout(() => {
+        windowActions.setPreviewFrame(this.props.frame.get('key'))
+        windowActions.setPreviewMode(true)
+      }, getSetting(settings.TAB_PREVIEW_TIMING))
     }
-    windowActions.setTabHoverState(this.props.frame.get('key'), true)
   }
 
   onAuxClick (e) {
@@ -288,6 +304,7 @@ class Tab extends ImmutableComponent {
         partOfFullPageSet: this.props.partOfFullPageSet || !!this.props.tabWidth
       })}
       style={this.props.tabWidth ? { flex: `0 0 ${this.props.tabWidth}px` } : {}}
+      onMouseMove={this.onMouseMove}
       onMouseEnter={this.onMouseEnter}
       onMouseLeave={this.onMouseLeave}>
       {
@@ -369,8 +386,6 @@ class Tab extends ImmutableComponent {
 }
 
 const paymentsEnabled = () => {
-  const getSetting = require('../../../../js/settings').getSetting
-  const settings = require('../../../../js/constants/settings')
   return getSetting(settings.PAYMENTS_ENABLED)
 }
 

app/renderer/components/tabs/tabs.js

@@ -152,6 +152,7 @@ class Tabs extends ImmutableComponent {
                 frame={frame}
                 key={'tab-' + frame.get('key')}
                 paintTabs={this.props.paintTabs}
+                previewMode={this.props.previewMode}
                 previewTabs={this.props.previewTabs}
                 isActive={this.props.activeFrameKey === frame.get('key')}
                 onTabClosedWithMouse={this.onTabClosedWithMouse}

app/renderer/components/tabs/tabsToolbar.js

@@ -45,6 +45,7 @@ class TabsToolbar extends ImmutableComponent {
         ? <PinnedTabs sites={this.props.sites}
           activeFrameKey={this.props.activeFrameKey}
           paintTabs={this.props.paintTabs}
+          previewMode={this.props.previewMode}
           previewTabs={this.props.previewTabs}
           dragData={this.props.dragData}
           tabPageIndex={this.props.tabPageIndex}
@@ -59,6 +60,7 @@ class TabsToolbar extends ImmutableComponent {
         shouldAllowWindowDrag={this.props.shouldAllowWindowDrag}
         dragData={this.props.dragData}
         paintTabs={this.props.paintTabs}
+        previewMode={this.props.previewMode}
         previewTabs={this.props.previewTabs}
         tabsPerTabPage={this.props.tabsPerTabPage}
         activeFrameKey={this.props.activeFrameKey}

docs/state.md

@@ -657,8 +657,9 @@ WindowStore
     },
     size: array, // last known window size [x, y]
     tabs: {
-      tabPageIndex: number, // index of the current tab page
+      previewMode: boolean, // true if frame preview should be fired or not based on mouse idle time
       previewTabPageIndex: number // index of the tab being previewed
+      tabPageIndex: number, // index of the current tab page
     },
   },
   widevinePanelDetail: {

js/about/preferences.js

@@ -34,7 +34,15 @@ const messages = require('../constants/messages')
 const settings = require('../constants/settings')
 const {changeSetting} = require('../../app/renderer/lib/settingsUtil')
 const {passwordManagers, extensionIds} = require('../constants/passwordManagers')
-const {startsWithOption, newTabMode, bookmarksToolbarMode, tabCloseAction, fullscreenOption, autoplayOption} = require('../../app/common/constants/settingsEnums')
+const {
+  startsWithOption,
+  newTabMode,
+  bookmarksToolbarMode,
+  tabCloseAction,
+  fullscreenOption,
+  autoplayOption,
+  tabPreviewTiming
+} = require('../../app/common/constants/settingsEnums')
 
 const aboutActions = require('./aboutActions')
 const appActions = require('../actions/appActions')
@@ -359,6 +367,19 @@ class TabsTab extends ImmutableComponent {
         <SettingCheckbox dataL10nId='switchToNewTabs' prefKey={settings.SWITCH_TO_NEW_TABS} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
         <SettingCheckbox dataL10nId='paintTabs' prefKey={settings.PAINT_TABS} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
         <SettingCheckbox dataL10nId='showTabPreviews' prefKey={settings.SHOW_TAB_PREVIEWS} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
+        {
+          getSetting(settings.SHOW_TAB_PREVIEWS, this.props.settings)
+            ? <SettingItem dataL10nId='tabPreviewTiming'>
+              <SettingDropdown
+                value={getSetting(settings.TAB_PREVIEW_TIMING, this.props.settings)}
+                onChange={changeSetting.bind(null, this.props.onChangeSetting, settings.TAB_PREVIEW_TIMING)}>
+                <option data-l10n-id='long' value={tabPreviewTiming.LONG} />
+                <option data-l10n-id='normal' value={tabPreviewTiming.NORMAL} />
+                <option data-l10n-id='short' value={tabPreviewTiming.SHORT} />
+              </SettingDropdown>
+            </SettingItem>
+            : null
+        }
         <SettingItem dataL10nId='dashboardSettingsTitle'>
           <SettingCheckbox dataL10nId='dashboardShowImages' prefKey={settings.SHOW_DASHBOARD_IMAGES} settings={this.props.settings} onChangeSetting={this.props.onChangeSetting} />
         </SettingItem>

js/actions/windowActions.js

@@ -272,6 +272,19 @@ const windowActions = {
     })
   },
 
+  /**
+   * Dispatches a message to the store to set preview mode.
+   * This will check whether setPreviewFrame should be fired or not.
+   *
+   * @param {Boolean} shouldEnablePreview - true if user enters previewMode
+   */
+  setPreviewMode: function (shouldEnablePreview) {
+    dispatch({
+      actionType: windowConstants.WINDOW_SET_PREVIEW_MODE,
+      shouldEnablePreview
+    })
+  },
+
   /**
    * Dispatches a message to the store to set the tab page index.
    *

js/components/main.js

@@ -851,6 +851,7 @@ class Main extends ImmutableComponent {
           paintTabs={getSetting(settings.PAINT_TABS)}
           shouldAllowWindowDrag={shouldAllowWindowDrag}
           dragData={this.props.appState.getIn(['dragData', 'type']) === dragTypes.TAB && this.props.appState.get('dragData')}
+          previewMode={this.props.windowState.getIn(['ui', 'tabs', 'previewMode'])}
           previewTabs={getSetting(settings.SHOW_TAB_PREVIEWS)}
           tabsPerTabPage={tabsPerPage}
           tabPageIndex={this.props.windowState.getIn(['ui', 'tabs', 'tabPageIndex'])}

js/constants/appConfig.js

@@ -138,6 +138,7 @@ module.exports = {
     'tabs.tabs-per-page': 20,
     'tabs.close-action': 'parent',
     'tabs.show-tab-previews': true,
+    'tabs.preview-timing': 2000,
     'tabs.show-dashboard-images': true,
     'privacy.history-suggestions': true,
     'privacy.bookmark-suggestions': true,

js/constants/settings.js

@@ -29,6 +29,7 @@ const settings = {
   PAINT_TABS: 'tabs.paint-tabs',
   TABS_PER_PAGE: 'tabs.tabs-per-page',
   SHOW_TAB_PREVIEWS: 'tabs.show-tab-previews',
+  TAB_PREVIEW_TIMING: 'tabs.preview-timing',
   SHOW_DASHBOARD_IMAGES: 'tabs.show-dashboard-images',
   // Privacy Tab
   HISTORY_SUGGESTIONS: 'privacy.history-suggestions',

js/constants/windowConstants.js

@@ -11,6 +11,7 @@ const windowConstants = {
   WINDOW_CLOSE_FRAMES: _,
   WINDOW_SET_FOCUSED_FRAME: _,
   WINDOW_SET_PREVIEW_FRAME: _,
+  WINDOW_SET_PREVIEW_MODE: _,
   WINDOW_SET_PREVIEW_TAB_PAGE_INDEX: _,
   WINDOW_SET_TAB_PAGE_INDEX: _,
   WINDOW_SET_TAB_BREAKPOINT: _,

js/stores/windowStore.js

@@ -348,6 +348,9 @@ const doAction = (action) => {
     case windowConstants.WINDOW_CLEAR_CLOSED_FRAMES:
       windowState = windowState.set('closedFrames', new Immutable.List())
       break
+    case windowConstants.WINDOW_SET_PREVIEW_MODE:
+      windowState = windowState.setIn(['ui', 'tabs', 'previewMode'], action.shouldEnablePreview)
+      break
     case windowConstants.WINDOW_SET_PREVIEW_FRAME:
       windowState = windowState.merge({
         previewFrameKey: action.frameKey != null && action.frameKey !== windowState.get('activeFrameKey')