Merge remote-tracking branch 'origin/master' into patch-1

16 files changed, 327 insertions, 140 deletions

diff --git a/src/content/actions/find.js b/src/content/actions/find.js
index 80d6210..c7345cc 100644
--- a/src/content/actions/find.js
+++ b/src/content/actions/find.js
@@ -5,6 +5,7 @@
 // NOTE: window.find is not standard API
 // https://developer.mozilla.org/en-US/docs/Web/API/Window/find
 
+import messages from 'shared/messages';
 import actions from 'content/actions';
 import * as consoleFrames from '../console-frames';
 
@@ -14,6 +15,13 @@ const postPatternNotFound = (pattern) => {
     'Pattern not found: ' + pattern);
 };
 
+const postPatternFound = (pattern) => {
+  return consoleFrames.postInfo(
+    window.document,
+    'Pattern found: ' + pattern,
+  );
+};
+
 const find = (string, backwards) => {
   let caseSensitive = false;
   let wrapScan = true;
@@ -24,32 +32,49 @@ const find = (string, backwards) => {
   return window.find(string, caseSensitive, backwards, wrapScan);
 };
 
-const findNext = (keyword, reset, backwards) => {
+const findNext = (currentKeyword, reset, backwards) => {
   if (reset) {
     window.getSelection().removeAllRanges();
   }
 
-  let found = find(keyword, backwards);
-  if (!found) {
-    window.getSelection().removeAllRanges();
-    found = find(keyword, backwards);
+  let promise = Promise.resolve(currentKeyword);
+  if (currentKeyword) {
+    browser.runtime.sendMessage({
+      type: messages.FIND_SET_KEYWORD,
+      keyword: currentKeyword,
+    });
+  } else {
+    promise = browser.runtime.sendMessage({
+      type: messages.FIND_GET_KEYWORD,
+    });
   }
-  if (!found) {
-    postPatternNotFound(keyword);
-  }
-  return {
-    type: actions.FIND_SET_KEYWORD,
-    keyword,
-    found,
-  };
+
+  return promise.then((keyword) => {
+    let found = find(keyword, backwards);
+    if (!found) {
+      window.getSelection().removeAllRanges();
+      found = find(keyword, backwards);
+    }
+    if (found) {
+      postPatternFound(keyword);
+    } else {
+      postPatternNotFound(keyword);
+    }
+
+    return {
+      type: actions.FIND_SET_KEYWORD,
+      keyword,
+      found,
+    };
+  });
 };
 
-const next = (keyword, reset) => {
-  return findNext(keyword, reset, false);
+const next = (currentKeyword, reset) => {
+  return findNext(currentKeyword, reset, false);
 };
 
-const prev = (keyword, reset) => {
-  return findNext(keyword, reset, true);
+const prev = (currentKeyword, reset) => {
+  return findNext(currentKeyword, reset, true);
 };
 
 export { next, prev };
diff --git a/src/content/actions/follow-controller.js b/src/content/actions/follow-controller.js
index 3fd4dce..006b248 100644
--- a/src/content/actions/follow-controller.js
+++ b/src/content/actions/follow-controller.js
@@ -1,9 +1,10 @@
 import actions from 'content/actions';
 
-const enable = (newTab) => {
+const enable = (newTab, background) => {
   return {
     type: actions.FOLLOW_CONTROLLER_ENABLE,
     newTab,
+    background,
   };
 };
 
diff --git a/src/content/actions/operation.js b/src/content/actions/operation.js
index 767f14b..9171766 100644
--- a/src/content/actions/operation.js
+++ b/src/content/actions/operation.js
@@ -2,12 +2,16 @@ import operations from 'shared/operations';
 import messages from 'shared/messages';
 import * as scrolls from 'content/scrolls';
 import * as navigates from 'content/navigates';
+import * as focuses from 'content/focuses';
 import * as urls from 'content/urls';
 import * as consoleFrames from 'content/console-frames';
 import * as addonActions from './addon';
+import * as properties from 'shared/settings/properties';
 
 // eslint-disable-next-line complexity
-const exec = (operation) => {
+const exec = (operation, repeat, settings) => {
+  let smoothscroll = settings.properties.smoothscroll ||
+    properties.defaults.smoothscroll;
   switch (operation.type) {
   case operations.ADDON_ENABLE:
     return addonActions.enable();
@@ -24,23 +28,24 @@ const exec = (operation) => {
       type: messages.FIND_PREV,
     }), '*');
   case operations.SCROLL_VERTICALLY:
-    return scrolls.scrollVertically(window, operation.count);
+    return scrolls.scrollVertically(operation.count, smoothscroll, repeat);
   case operations.SCROLL_HORIZONALLY:
-    return scrolls.scrollHorizonally(window, operation.count);
+    return scrolls.scrollHorizonally(operation.count, smoothscroll, repeat);
   case operations.SCROLL_PAGES:
-    return scrolls.scrollPages(window, operation.count);
+    return scrolls.scrollPages(operation.count, smoothscroll, repeat);
   case operations.SCROLL_TOP:
-    return scrolls.scrollTop(window);
+    return scrolls.scrollTop(smoothscroll, repeat);
   case operations.SCROLL_BOTTOM:
-    return scrolls.scrollBottom(window);
+    return scrolls.scrollBottom(smoothscroll, repeat);
   case operations.SCROLL_HOME:
-    return scrolls.scrollHome(window);
+    return scrolls.scrollHome(smoothscroll, repeat);
   case operations.SCROLL_END:
-    return scrolls.scrollEnd(window);
+    return scrolls.scrollEnd(smoothscroll, repeat);
   case operations.FOLLOW_START:
     return window.top.postMessage(JSON.stringify({
       type: messages.FOLLOW_START,
-      newTab: operation.newTab
+      newTab: operation.newTab,
+      background: operation.background,
     }), '*');
   case operations.NAVIGATE_HISTORY_PREV:
     return navigates.historyPrev(window);
@@ -54,12 +59,13 @@ const exec = (operation) => {
     return navigates.parent(window);
   case operations.NAVIGATE_ROOT:
     return navigates.root(window);
+  case operations.FOCUS_INPUT:
+    return focuses.focusInput();
   case operations.URLS_YANK:
     urls.yank(window);
-    return consoleFrames.postMessage(window.document, {
-      type: messages.CONSOLE_SHOW_INFO,
-      text: 'Current url yanked',
-    });
+    return consoleFrames.postInfo(window.document, 'Current url yanked');
+  case operations.URLS_PASTE:
+    return urls.paste(window, operation.newTab ? operation.newTab : false);
   default:
     browser.runtime.sendMessage({
       type: messages.BACKGROUND_OPERATION,
diff --git a/src/content/actions/setting.js b/src/content/actions/setting.js
index 0238c71..4c1e385 100644
--- a/src/content/actions/setting.js
+++ b/src/content/actions/setting.js
@@ -1,10 +1,17 @@
 import actions from 'content/actions';
 import * as keyUtils from 'shared/utils/keys';
+import operations from 'shared/operations';
+
+const reservedKeymaps = {
+  '<Esc>': { type: operations.CANCEL },
+  '<C-[>': { type: operations.CANCEL },
+};
 
 const set = (value) => {
   let entries = [];
   if (value.keymaps) {
-    entries = Object.entries(value.keymaps).map((entry) => {
+    let keymaps = Object.assign({}, value.keymaps, reservedKeymaps);
+    entries = Object.entries(keymaps).map((entry) => {
       return [
         keyUtils.fromMapKeys(entry[0]),
         entry[1],
diff --git a/src/content/components/common/follow.js b/src/content/components/common/follow.js
index 7a35105..2a55ea3 100644
--- a/src/content/components/common/follow.js
+++ b/src/content/components/common/follow.js
@@ -4,7 +4,8 @@ import * as dom from 'shared/utils/dom';
 
 const TARGET_SELECTOR = [
   'a', 'button', 'input', 'textarea', 'area',
-  '[contenteditable=true]', '[contenteditable=""]', '[tabindex]'
+  '[contenteditable=true]', '[contenteditable=""]', '[tabindex]',
+  '[role="button"]'
 ].join(',');
 
 
@@ -29,11 +30,27 @@ const inViewport = (win, element, viewSize, framePosition) => {
   return true;
 };
 
+const isAriaHiddenOrAriaDisabled = (win, element) => {
+  if (!element || win.document.documentElement === element) {
+    return false;
+  }
+  for (let attr of ['aria-hidden', 'aria-disabled']) {
+    if (element.hasAttribute(attr)) {
+      let hidden = element.getAttribute(attr).toLowerCase();
+      if (hidden === '' || hidden === 'true') {
+        return true;
+      }
+    }
+  }
+  return isAriaHiddenOrAriaDisabled(win, element.parentNode);
+};
+
 export default class Follow {
   constructor(win, store) {
     this.win = win;
     this.store = store;
     this.newTab = false;
+    this.background = false;
     this.hints = {};
     this.targets = [];
 
@@ -47,6 +64,7 @@ export default class Follow {
     this.win.parent.postMessage(JSON.stringify({
       type: messages.FOLLOW_KEY_PRESS,
       key: key.key,
+      ctrlKey: key.ctrlKey,
     }), '*');
     return true;
   }
@@ -68,6 +86,7 @@ export default class Follow {
       type: messages.OPEN_URL,
       url: element.href,
       newTab: true,
+      background: this.background,
     });
   }
 
@@ -79,12 +98,13 @@ export default class Follow {
     }), '*');
   }
 
-  createHints(keysArray, newTab) {
+  createHints(keysArray, newTab, background) {
     if (keysArray.length !== this.targets.length) {
       throw new Error('illegal hint count');
     }
 
     this.newTab = newTab;
+    this.background = background;
     this.hints = {};
     for (let i = 0; i < keysArray.length; ++i) {
       let keys = keysArray[i];
@@ -150,7 +170,8 @@ export default class Follow {
     case messages.FOLLOW_REQUEST_COUNT_TARGETS:
       return this.countHints(sender, message.viewSize, message.framePosition);
     case messages.FOLLOW_CREATE_HINTS:
-      return this.createHints(message.keysArray, message.newTab);
+      return this.createHints(
+        message.keysArray, message.newTab, message.background);
     case messages.FOLLOW_SHOW_HINTS:
       return this.showHints(message.keys);
     case messages.FOLLOW_ACTIVATE:
@@ -170,6 +191,7 @@ export default class Follow {
         style.visibility !== 'hidden' &&
         element.type !== 'hidden' &&
         element.offsetHeight > 0 &&
+        !isAriaHiddenOrAriaDisabled(win, element) &&
         inViewport(win, element, viewSize, framePosition);
     });
     return filtered;
diff --git a/src/content/components/common/input.js b/src/content/components/common/input.js
index 22b0a91..eefaf10 100644
--- a/src/content/components/common/input.js
+++ b/src/content/components/common/input.js
@@ -1,6 +1,10 @@
 import * as dom from 'shared/utils/dom';
 import * as keys from 'shared/utils/keys';
 
+const cancelKey = (e) => {
+  return e.key === 'Escape' || e.key === '[' && e.ctrlKey;
+};
+
 export default class InputComponent {
   constructor(target) {
     this.pressed = {};
@@ -37,7 +41,7 @@ export default class InputComponent {
 
   capture(e) {
     if (this.fromInput(e)) {
-      if (e.key === 'Escape' && e.target.blur) {
+      if (cancelKey(e) && e.target.blur) {
         e.target.blur();
       }
       return;
diff --git a/src/content/components/common/keymapper.js b/src/content/components/common/keymapper.js
index fb8fabe..d9d1b2f 100644
--- a/src/content/components/common/keymapper.js
+++ b/src/content/components/common/keymapper.js
@@ -47,7 +47,8 @@ export default class KeymapperComponent {
       return true;
     }
     let operation = keymaps.get(matched[0]);
-    this.store.dispatch(operationActions.exec(operation));
+    this.store.dispatch(operationActions.exec(
+      operation, key.repeat, state.setting));
     this.store.dispatch(inputActions.clearKeys());
     return true;
   }
diff --git a/src/content/components/top-content/find.js b/src/content/components/top-content/find.js
index bccf040..4d46d79 100644
--- a/src/content/components/top-content/find.js
+++ b/src/content/components/top-content/find.js
@@ -1,6 +1,5 @@
 import * as findActions from 'content/actions/find';
 import messages from 'shared/messages';
-import * as consoleFrames from '../../console-frames';
 
 export default class FindComponent {
   constructor(win, store) {
@@ -32,23 +31,11 @@ export default class FindComponent {
 
   next() {
     let state = this.store.getState().find;
-
-    if (!state.found) {
-      return consoleFrames.postError(
-        window.document,
-        'Pattern not found: ' + state.keyword);
-    }
     return this.store.dispatch(findActions.next(state.keyword, false));
   }
 
   prev() {
     let state = this.store.getState().find;
-
-    if (!state.found) {
-      return consoleFrames.postError(
-        window.document,
-        'Pattern not found: ' + state.keyword);
-    }
     return this.store.dispatch(findActions.prev(state.keyword, false));
   }
 }
diff --git a/src/content/components/top-content/follow-controller.js b/src/content/components/top-content/follow-controller.js
index d373177..7f36604 100644
--- a/src/content/components/top-content/follow-controller.js
+++ b/src/content/components/top-content/follow-controller.js
@@ -1,8 +1,7 @@
 import * as followControllerActions from 'content/actions/follow-controller';
 import messages from 'shared/messages';
 import HintKeyProducer from 'content/hint-key-producer';
-
-const DEFAULT_HINT_CHARSET = 'abcdefghijklmnopqrstuvwxyz';
+import * as properties from 'shared/settings/properties';
 
 const broadcastMessage = (win, message) => {
   let json = JSON.stringify(message);
@@ -29,11 +28,11 @@ export default class FollowController {
     switch (message.type) {
     case messages.FOLLOW_START:
       return this.store.dispatch(
-        followControllerActions.enable(message.newTab));
+        followControllerActions.enable(message.newTab, message.background));
     case messages.FOLLOW_RESPONSE_COUNT_TARGETS:
       return this.create(message.count, sender);
     case messages.FOLLOW_KEY_PRESS:
-      return this.keyPress(message.key);
+      return this.keyPress(message.key, message.ctrlKey);
     }
   }
 
@@ -70,7 +69,11 @@ export default class FollowController {
     });
   }
 
-  keyPress(key) {
+  keyPress(key, ctrlKey) {
+    if (key === '[' && ctrlKey) {
+      this.store.dispatch(followControllerActions.disable());
+      return true;
+    }
     switch (key) {
     case 'Enter':
       this.activate();
@@ -84,7 +87,7 @@ export default class FollowController {
       this.store.dispatch(followControllerActions.backspace());
       break;
     default:
-      if (DEFAULT_HINT_CHARSET.includes(key)) {
+      if (this.hintchars().includes(key)) {
         this.store.dispatch(followControllerActions.keyPress(key));
       }
       break;
@@ -93,7 +96,7 @@ export default class FollowController {
   }
 
   count() {
-    this.producer = new HintKeyProducer(DEFAULT_HINT_CHARSET);
+    this.producer = new HintKeyProducer(this.hintchars());
     let doc = this.win.document;
     let viewWidth = this.win.innerWidth || doc.documentElement.clientWidth;
     let viewHeight = this.win.innerHeight || doc.documentElement.clientHeight;
@@ -126,6 +129,7 @@ export default class FollowController {
       type: messages.FOLLOW_CREATE_HINTS,
       keysArray: produced,
       newTab: this.state.newTab,
+      background: this.state.background,
     }), '*');
   }
 
@@ -135,4 +139,9 @@ export default class FollowController {
       type: messages.FOLLOW_REMOVE_HINTS,
     });
   }
+
+  hintchars() {
+    return this.store.getState().setting.properties.hintchars ||
+      properties.defaults.hintchars;
+  }
 }
diff --git a/src/content/console-frames.js b/src/content/console-frames.js
index 515ae09..0c0ec02 100644
--- a/src/content/console-frames.js
+++ b/src/content/console-frames.js
@@ -28,4 +28,11 @@ const postError = (doc, message) => {
   });
 };
 
-export { initialize, blur, postMessage, postError };
+const postInfo = (doc, message) => {
+  return postMessage(doc, {
+    type: messages.CONSOLE_SHOW_INFO,
+    text: message,
+  });
+};
+
+export { initialize, blur, postError, postInfo };
diff --git a/src/content/focuses.js b/src/content/focuses.js
new file mode 100644
index 0000000..a6f6cc8
--- /dev/null
+++ b/src/content/focuses.js
@@ -0,0 +1,13 @@
+import * as doms from 'shared/utils/dom';
+
+const focusInput = () => {
+  let inputTypes = ['email', 'number', 'search', 'tel', 'text', 'url'];
+  let inputSelector = inputTypes.map(type => `input[type=${type}]`).join(',');
+  let targets = window.document.querySelectorAll(inputSelector + ',textarea');
+  let target = Array.from(targets).find(doms.isVisible);
+  if (target) {
+    target.focus();
+  }
+};
+
+export { focusInput };
diff --git a/src/content/navigates.js b/src/content/navigates.js
index 64e5fc0..c9baa30 100644
--- a/src/content/navigates.js
+++ b/src/content/navigates.js
@@ -1,17 +1,18 @@
-const PREV_LINK_PATTERNS = [
-  /\bprev\b/i, /\bprevious\b/i, /\bback\b/i,
-  /</, /\u2039/, /\u2190/, /\xab/, /\u226a/, /<</
-];
-const NEXT_LINK_PATTERNS = [
-  /\bnext\b/i,
-  />/, /\u203a/, /\u2192/, /\xbb/, /\u226b/, />>/
-];
-
-const findLinkByPatterns = (win, patterns) => {
-  let links = win.document.getElementsByTagName('a');
-  return Array.prototype.find.call(links, (link) => {
-    return patterns.some(ptn => ptn.test(link.textContent));
-  });
+const REL_PATTERN = {
+  prev: /^(?:prev(?:ious)?|older)\b|\u2039|\u2190|\xab|\u226a|<</i,
+  next: /^(?:next|newer)\b|\u203a|\u2192|\xbb|\u226b|>>/i,
+};
+
+// Return the last element in the document matching the supplied selector
+// and the optional filter, or null if there are no matches.
+const selectLast = (win, selector, filter) => {
+  let nodes = win.document.querySelectorAll(selector);
+
+  if (filter) {
+    nodes = Array.from(nodes).filter(filter);
+  }
+
+  return nodes.length ? nodes[nodes.length - 1] : null;
 };
 
 const historyPrev = (win) => {
@@ -22,30 +23,37 @@ const historyNext = (win) => {
   win.history.forward();
 };
 
-const linkPrev = (win) => {
-  let link = win.document.querySelector('a[rel=prev]');
+// Code common to linkPrev and linkNext which navigates to the specified page.
+const linkRel = (win, rel) => {
+  let link = selectLast(win, `link[rel~=${rel}][href]`);
+
   if (link) {
-    return link.click();
+    win.location = link.href;
+    return;
   }
-  link = findLinkByPatterns(win, PREV_LINK_PATTERNS);
+
+  const pattern = REL_PATTERN[rel];
+
+  link = selectLast(win, `a[rel~=${rel}][href]`) ||
+    // `innerText` is much slower than `textContent`, but produces much better
+    // (i.e. less unexpected) results
+    selectLast(win, 'a[href]', lnk => pattern.test(lnk.innerText));
+
   if (link) {
     link.click();
   }
 };
 
+const linkPrev = (win) => {
+  linkRel(win, 'prev');
+};
+
 const linkNext = (win) => {
-  let link = win.document.querySelector('a[rel=next]');
-  if (link) {
-    return link.click();
-  }
-  link = findLinkByPatterns(win, NEXT_LINK_PATTERNS);
-  if (link) {
-    link.click();
-  }
+  linkRel(win, 'next');
 };
 
 const parent = (win) => {
-  let loc = win.location;
+  const loc = win.location;
   if (loc.hash !== '') {
     loc.hash = '';
     return;
diff --git a/src/content/reducers/find.js b/src/content/reducers/find.js
index eb43c37..8d63ee5 100644
--- a/src/content/reducers/find.js
+++ b/src/content/reducers/find.js
@@ -1,7 +1,7 @@
 import actions from 'content/actions';
 
 const defaultState = {
-  keyword: '',
+  keyword: null,
   found: false,
 };
 
diff --git a/src/content/reducers/follow-controller.js b/src/content/reducers/follow-controller.js
index 2afb232..78fd848 100644
--- a/src/content/reducers/follow-controller.js
+++ b/src/content/reducers/follow-controller.js
@@ -3,6 +3,7 @@ import actions from 'content/actions';
 const defaultState = {
   enabled: false,
   newTab: false,
+  background: false,
   keys: '',
 };
 
@@ -12,6 +13,7 @@ export default function reducer(state = defaultState, action = {}) {
     return Object.assign({}, state, {
       enabled: true,
       newTab: action.newTab,
+      background: action.background,
       keys: '',
     });
   case actions.FOLLOW_CONTROLLER_DISABLE:
diff --git a/src/content/scrolls.js b/src/content/scrolls.js
index ef38273..0d1f7c8 100644
--- a/src/content/scrolls.js
+++ b/src/content/scrolls.js
@@ -1,27 +1,14 @@
+import * as doms from 'shared/utils/dom';
+
 const SCROLL_DELTA_X = 48;
 const SCROLL_DELTA_Y = 48;
+const SMOOTH_SCROLL_DURATION = 150;
 
-const isVisible = (win, element) => {
-  let rect = element.getBoundingClientRect();
-  if (rect.width === 0 || rect.height === 0) {
-    return false;
-  }
-  if (rect.right < 0 && rect.bottom < 0) {
-    return false;
-  }
-  if (win.innerWidth < rect.left && win.innerHeight < rect.top) {
-    return false;
-  }
-
-  let { display, visibility } = win.getComputedStyle(element);
-  if (display === 'none' || visibility === 'hidden') {
-    return false;
-  }
-  return true;
-};
+// dirty way to store scrolling state on globally
+let scrolling = [false];
 
-const isScrollableStyle = (win, element) => {
-  let { overflowX, overflowY } = win.getComputedStyle(element);
+const isScrollableStyle = (element) => {
+  let { overflowX, overflowY } = window.getComputedStyle(element);
   return !(overflowX !== 'scroll' && overflowX !== 'auto' &&
     overflowY !== 'scroll' && overflowY !== 'auto');
 };
@@ -35,15 +22,14 @@ const isOverflowed = (element) => {
 // this method is called by each scrolling, and the returned value of this
 // method is not cached.  That does not cause performance issue because in the
 // most pages, the window is root element i,e, documentElement.
-const findScrollable = (win, element) => {
-  if (isScrollableStyle(win, element) && isOverflowed(element)) {
+const findScrollable = (element) => {
+  if (isScrollableStyle(element) && isOverflowed(element)) {
     return element;
   }
 
-  let children = Array.prototype
-    .filter.call(element.children, e => isVisible(win, e));
+  let children = Array.from(element.children).filter(doms.isVisible);
   for (let child of children) {
-    let scrollable = findScrollable(win, child);
+    let scrollable = findScrollable(child);
     if (scrollable) {
       return scrollable;
     }
@@ -51,68 +37,153 @@ const findScrollable = (win, element) => {
   return null;
 };
 
-const scrollTarget = (win) => {
-  if (isOverflowed(win.document.documentElement)) {
-    return win.document.documentElement;
+const scrollTarget = () => {
+  if (isOverflowed(window.document.documentElement)) {
+    return window.document.documentElement;
   }
-  if (isOverflowed(win.document.body)) {
-    return win.document.body;
+  if (isOverflowed(window.document.body)) {
+    return window.document.body;
   }
-  let target = findScrollable(win, win.document.documentElement);
+  let target = findScrollable(window.document.documentElement);
   if (target) {
     return target;
   }
-  return win.document.documentElement;
+  return window.document.documentElement;
 };
 
-const scrollVertically = (win, count) => {
-  let target = scrollTarget(win);
+class SmoothScroller {
+  constructor(element, repeat) {
+    this.element = element;
+    this.repeat = repeat;
+    this.scrolling = scrolling;
+    if (repeat) {
+      this.easing = SmoothScroller.linearEasing;
+    } else {
+      this.easing = SmoothScroller.inOutQuadEasing;
+    }
+  }
+
+  scroll(x, y) {
+    if (this.scrolling[0]) {
+      return;
+    }
+    scrolling[0] = true;
+
+    this.startX = this.element.scrollLeft;
+    this.startY = this.element.scrollTop;
+
+    this.targetX = x;
+    this.targetY = y;
+    this.distanceX = x - this.startX;
+    this.distanceY = y - this.startY;
+    this.timeStart = 0;
+
+    window.requestAnimationFrame(this.loop.bind(this));
+  }
+
+  loop(time) {
+    if (!this.timeStart) {
+      this.timeStart = time;
+    }
+
+    let elapsed = time - this.timeStart;
+    let v = this.easing(elapsed / SMOOTH_SCROLL_DURATION);
+    let nextX = this.startX + this.distanceX * v;
+    let nextY = this.startY + this.distanceY * v;
+
+    window.scrollTo(nextX, nextY);
+
+    if (elapsed < SMOOTH_SCROLL_DURATION) {
+      window.requestAnimationFrame(this.loop.bind(this));
+    } else {
+      scrolling[0] = false;
+      this.element.scrollTo(this.targetX, this.targetY);
+    }
+  }
+
+  static inOutQuadEasing(t) {
+    if (t < 1) {
+      return t * t;
+    }
+    return -(t - 1) * (t - 1) + 1;
+  }
+
+  static linearEasing(t) {
+    return t;
+  }
+}
+
+class RoughtScroller {
+  constructor(element) {
+    this.element = element;
+  }
+
+  scroll(x, y) {
+    this.element.scrollTo(x, y);
+  }
+}
+
+const scroller = (element, smooth, repeat) => {
+  if (smooth) {
+    return new SmoothScroller(element, repeat);
+  }
+  return new RoughtScroller(element);
+};
+
+const scrollVertically = (count, smooth, repeat) => {
+  let target = scrollTarget();
   let x = target.scrollLeft;
   let y = target.scrollTop + SCROLL_DELTA_Y * count;
-  target.scrollTo(x, y);
+  if (repeat && smooth) {
+    y = target.scrollTop + SCROLL_DELTA_Y * count * 4;
+  }
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollHorizonally = (win, count) => {
-  let target = scrollTarget(win);
+const scrollHorizonally = (count, smooth, repeat) => {
+  let target = scrollTarget();
   let x = target.scrollLeft + SCROLL_DELTA_X * count;
   let y = target.scrollTop;
-  target.scrollTo(x, y);
+  if (repeat && smooth) {
+    y = target.scrollTop + SCROLL_DELTA_Y * count * 4;
+  }
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollPages = (win, count) => {
-  let target = scrollTarget(win);
+const scrollPages = (count, smooth, repeat) => {
+  let target = scrollTarget();
   let height = target.clientHeight;
   let x = target.scrollLeft;
   let y = target.scrollTop + height * count;
-  target.scrollTo(x, y);
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollTop = (win) => {
-  let target = scrollTarget(win);
+const scrollTop = (smooth, repeat) => {
+  let target = scrollTarget();
   let x = target.scrollLeft;
   let y = 0;
-  target.scrollTo(x, y);
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollBottom = (win) => {
-  let target = scrollTarget(win);
+const scrollBottom = (smooth, repeat) => {
+  let target = scrollTarget();
   let x = target.scrollLeft;
   let y = target.scrollHeight;
-  target.scrollTo(x, y);
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollHome = (win) => {
-  let target = scrollTarget(win);
+const scrollHome = (smooth, repeat) => {
+  let target = scrollTarget();
   let x = 0;
   let y = target.scrollTop;
-  target.scrollTo(x, y);
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
-const scrollEnd = (win) => {
-  let target = scrollTarget(win);
+const scrollEnd = (smooth, repeat) => {
+  let target = scrollTarget();
   let x = target.scrollWidth;
   let y = target.scrollTop;
-  target.scrollTo(x, y);
+  scroller(target, smooth, repeat).scroll(x, y);
 };
 
 export {
diff --git a/src/content/urls.js b/src/content/urls.js
index 8f8a1ac..9b7b284 100644
--- a/src/content/urls.js
+++ b/src/content/urls.js
@@ -1,3 +1,5 @@
+import messages from 'shared/messages';
+
 const yank = (win) => {
   let input = win.document.createElement('input');
   win.document.body.append(input);
@@ -12,4 +14,26 @@ const yank = (win) => {
   input.remove();
 };
 
-export { yank };
+const paste = (win, newTab) => {
+  let textarea = win.document.createElement('textarea');
+  win.document.body.append(textarea);
+
+  textarea.style.position = 'fixed';
+  textarea.style.top = '-100px';
+  textarea.contentEditable = 'true';
+  textarea.focus();
+
+  if (win.document.execCommand('paste')) {
+    if (/^(https?|ftp):\/\//.test(textarea.textContent)) {
+      browser.runtime.sendMessage({
+        type: messages.OPEN_URL,
+        url: textarea.textContent,
+        newTab: newTab ? newTab : false,
+      });
+    }
+  }
+
+  textarea.remove();
+};
+
+export { yank, paste };