1 files changed, 0 insertions, 149 deletions
diff --git a/src/content/follow.js b/src/content/follow.js
deleted file mode 100644
index b1d2f5c..0000000
--- a/src/content/follow.js
+++ /dev/null
@@ -1,149 +0,0 @@
-import Hint from './hint';
-import HintKeyProducer from './hint-key-producer';
-
-const DEFAULT_HINT_CHARSET = 'abcdefghijklmnopqrstuvwxyz';
-
-export default class Follow {
-  constructor(doc) {
-    this.doc = doc;
-    this.hintElements = {};
-    this.keys = [];
-    this.onActivatedCallbacks = [];
-
-    let links = Follow.getTargetElements(doc);
-
-    this.addHints(links);
-
-    this.boundKeydown = this.handleKeydown.bind(this);
-    doc.addEventListener('keydown', this.boundKeydown);
-  }
-
-  addHints(elements) {
-    let producer = new HintKeyProducer(DEFAULT_HINT_CHARSET);
-    Array.prototype.forEach.call(elements, (ele) => {
-      let keys = producer.produce();
-      let hint = new Hint(ele, keys);
-
-      this.hintElements[keys] = hint;
-    });
-  }
-
-  handleKeydown(e) {
-    let { keyCode } = e;
-    if (keyCode === KeyboardEvent.DOM_VK_ESCAPE) {
-      this.remove();
-      return;
-    } else if (keyCode === KeyboardEvent.DOM_VK_ENTER ||
-               keyCode === KeyboardEvent.DOM_VK_RETURN) {
-      let chars = Follow.codeChars(this.keys);
-      this.activate(this.hintElements[chars].target);
-      return;
-    } else if (Follow.availableKey(keyCode)) {
-      this.keys.push(keyCode);
-    } else if (keyCode === KeyboardEvent.DOM_VK_BACK_SPACE ||
-               keyCode === KeyboardEvent.DOM_VK_DELETE) {
-      this.keys.pop();
-    }
-
-    e.stopPropagation();
-    e.preventDefault();
-
-    this.refreshKeys();
-  }
-
-  refreshKeys() {
-    let chars = Follow.codeChars(this.keys);
-    let shown = Object.keys(this.hintElements).filter((key) => {
-      return key.startsWith(chars);
-    });
-    let hidden = Object.keys(this.hintElements).filter((key) => {
-      return !key.startsWith(chars);
-    });
-    if (shown.length === 0) {
-      this.remove();
-      return;
-    } else if (shown.length === 1) {
-      this.remove();
-      this.activate(this.hintElements[chars].target);
-    }
-
-    shown.forEach((key) => {
-      this.hintElements[key].show();
-    });
-    hidden.forEach((key) => {
-      this.hintElements[key].hide();
-    });
-  }
-
-  remove() {
-    this.doc.removeEventListener('keydown', this.boundKeydown);
-    Object.keys(this.hintElements).forEach((key) => {
-      this.hintElements[key].remove();
-    });
-  }
-
-  activate(element) {
-    this.onActivatedCallbacks.forEach(f => f(element));
-  }
-
-  onActivated(f) {
-    this.onActivatedCallbacks.push(f);
-  }
-
-  static availableKey(keyCode) {
-    return (
-      KeyboardEvent.DOM_VK_0 <= keyCode && keyCode <= KeyboardEvent.DOM_VK_9 ||
-      KeyboardEvent.DOM_VK_A <= keyCode && keyCode <= KeyboardEvent.DOM_VK_Z
-    );
-  }
-
-  static isNumericKey(code) {
-    return KeyboardEvent.DOM_VK_0 <= code && code <= KeyboardEvent.DOM_VK_9;
-  }
-
-  static isAlphabeticKey(code) {
-    return KeyboardEvent.DOM_VK_A <= code && code <= KeyboardEvent.DOM_VK_Z;
-  }
-
-  static codeChars(codes) {
-    const CHARCODE_ZERO = '0'.charCodeAt(0);
-    const CHARCODE_A = 'a'.charCodeAt(0);
-
-    let chars = '';
-
-    for (let code of codes) {
-      if (Follow.isNumericKey(code)) {
-        chars += String.fromCharCode(
-          code - KeyboardEvent.DOM_VK_0 + CHARCODE_ZERO);
-      } else if (Follow.isAlphabeticKey(code)) {
-        chars += String.fromCharCode(
-          code - KeyboardEvent.DOM_VK_A + CHARCODE_A);
-      }
-    }
-    return chars;
-  }
-
-  static inWindow(window, element) {
-    let {
-      top, left, bottom, right
-    } = element.getBoundingClientRect();
-    return (
-      top >= 0 && left >= 0 &&
-      bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
-      right <= (window.innerWidth || document.documentElement.clientWidth)
-    );
-  }
-
-  static getTargetElements(doc) {
-    let all = doc.querySelectorAll('a,button,input,textarea');
-    let filtered = Array.prototype.filter.call(all, (element) => {
-      let style = window.getComputedStyle(element);
-      return style.display !== 'none' &&
-        style.visibility !== 'hidden' &&
-        element.type !== 'hidden' &&
-        element.offsetHeight > 0 &&
-        Follow.inWindow(window, element);
-    });
-    return filtered;
-  }
-}