text: /**
   * Copyright 2017 Google Inc. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the 'License');
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an 'AS IS' BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  const {helper, assert} = require('./helper');
  const keyDefinitions = require('./USKeyboardLayout');
  
  /**
   * @typedef {Object} KeyDescription
   * @property {number} keyCode
   * @property {string} key
   * @property {string} text
   * @property {string} code
   * @property {number} location
   */
  
  class Keyboard {
    /**
     * @param {!Puppeteer.CDPSession} client
     */
    constructor(client) {
      this._client = client;
      this._modifiers = 0;
      this._pressedKeys = new Set();
    }
  
    /**
     * @param {string} key
     * @param {{text?: string}=} options
     */
    /* async */ down(key, options = { text: undefined }) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const description = this._keyDescriptionForString(key);
  
      const autoRepeat = this._pressedKeys.has(description.code);
      this._pressedKeys.add(description.code);
      this._modifiers |= this._modifierBit(description.key);
  
      const text = options.text === undefined ? description.text : options.text;
      (yield this._client.send('Input.dispatchKeyEvent', {
        type: text ? 'keyDown' : 'rawKeyDown',
        modifiers: this._modifiers,
        windowsVirtualKeyCode: description.keyCode,
        code: description.code,
        key: description.key,
        text: text,
        unmodifiedText: text,
        autoRepeat,
        location: description.location,
        isKeypad: description.location === 3
      }));
    });}
  
    /**
     * @param {string} key
     * @return {number}
     */
    _modifierBit(key) {
      if (key === 'Alt')
        return 1;
      if (key === 'Control')
        return 2;
      if (key === 'Meta')
        return 4;
      if (key === 'Shift')
        return 8;
      return 0;
    }
  
    /**
     * @param {string} keyString
     * @return {KeyDescription}
     */
    _keyDescriptionForString(keyString) {
      const shift = this._modifiers & 8;
      const description = {
        key: '',
        keyCode: 0,
        code: '',
        text: '',
        location: 0
      };
  
      const definition = keyDefinitions[keyString];
      assert(definition, `Unknown key: "${keyString}"`);
  
      if (definition.key)
        description.key = definition.key;
      if (shift && definition.shiftKey)
        description.key = definition.shiftKey;
  
      if (definition.keyCode)
        description.keyCode = definition.keyCode;
      if (shift && definition.shiftKeyCode)
        description.keyCode = definition.shiftKeyCode;
  
      if (definition.code)
        description.code = definition.code;
  
      if (definition.location)
        description.location = definition.location;
  
      if (description.key.length === 1)
        description.text = description.key;
  
      if (definition.text)
        description.text = definition.text;
      if (shift && definition.shiftText)
        description.text = definition.shiftText;
  
      // if any modifiers besides shift are pressed, no text should be sent
      if (this._modifiers & ~8)
        description.text = '';
  
      return description;
    }
  
    /**
     * @param {string} key
     */
    /* async */ up(key) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const description = this._keyDescriptionForString(key);
  
      this._modifiers &= ~this._modifierBit(description.key);
      this._pressedKeys.delete(description.code);
      (yield this._client.send('Input.dispatchKeyEvent', {
        type: 'keyUp',
        modifiers: this._modifiers,
        key: description.key,
        windowsVirtualKeyCode: description.keyCode,
        code: description.code,
        location: description.location
      }));
    });}
  
    /**
     * @param {string} char
     */
    /* async */ sendCharacter(char) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      (yield this._client.send('Input.insertText', {text: char}));
    });}
  
    /**
     * @param {string} text
     * @param {{delay: (number|undefined)}=} options
     */
    /* async */ type(text, options) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      let delay = 0;
      if (options && options.delay)
        delay = options.delay;
      for (const char of text) {
        if (keyDefinitions[char])
          (yield this.press(char, {delay}));
        else
          (yield this.sendCharacter(char));
        if (delay)
          (yield new Promise(f => setTimeout(f, delay)));
      }
    });}
  
    /**
     * @param {string} key
     * @param {!{delay?: number, text?: string}=} options
     */
    /* async */ press(key, options = {}) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const {delay = null} = options;
      (yield this.down(key, options));
      if (delay !== null)
        (yield new Promise(f => setTimeout(f, options.delay)));
      (yield this.up(key));
    });}
  }
  
  class Mouse {
    /**
     * @param {Puppeteer.CDPSession} client
     * @param {!Keyboard} keyboard
     */
    constructor(client, keyboard) {
      this._client = client;
      this._keyboard = keyboard;
      this._x = 0;
      this._y = 0;
      /** @type {'none'|'left'|'right'|'middle'} */
      this._button = 'none';
    }
  
    /**
     * @param {number} x
     * @param {number} y
     * @param {!{steps?: number}=} options
     */
    /* async */ move(x, y, options = {}) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const {steps = 1} = options;
      const fromX = this._x, fromY = this._y;
      this._x = x;
      this._y = y;
      for (let i = 1; i <= steps; i++) {
        (yield this._client.send('Input.dispatchMouseEvent', {
          type: 'mouseMoved',
          button: this._button,
          x: fromX + (this._x - fromX) * (i / steps),
          y: fromY + (this._y - fromY) * (i / steps),
          modifiers: this._keyboard._modifiers
        }));
      }
    });}
  
    /**
     * @param {number} x
     * @param {number} y
     * @param {!{delay?: number, button?: "left"|"right"|"middle", clickCount?: number}=} options
     */
    /* async */ click(x, y, options = {}) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const {delay = null} = options;
      this.move(x, y);
      this.down(options);
      if (delay !== null)
        (yield new Promise(f => setTimeout(f, delay)));
      (yield this.up(options));
    });}
  
    /**
     * @param {!{button?: "left"|"right"|"middle", clickCount?: number}=} options
     */
    /* async */ down(options = {}) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const {button = 'left', clickCount = 1} = options;
      this._button = button;
      (yield this._client.send('Input.dispatchMouseEvent', {
        type: 'mousePressed',
        button,
        x: this._x,
        y: this._y,
        modifiers: this._keyboard._modifiers,
        clickCount
      }));
    });}
  
    /**
     * @param {!{button?: "left"|"right"|"middle", clickCount?: number}=} options
     */
    /* async */ up(options = {}) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      const {button = 'left', clickCount = 1} = options;
      this._button = 'none';
      (yield this._client.send('Input.dispatchMouseEvent', {
        type: 'mouseReleased',
        button,
        x: this._x,
        y: this._y,
        modifiers: this._keyboard._modifiers,
        clickCount
      }));
    });}
  }
  
  class Touchscreen {
    /**
     * @param {Puppeteer.CDPSession} client
     * @param {Keyboard} keyboard
     */
    constructor(client, keyboard) {
      this._client = client;
      this._keyboard = keyboard;
    }
  
    /**
     * @param {number} x
     * @param {number} y
     */
    /* async */ tap(x, y) {return (fn => {
    const gen = fn.call(this);
    return new Promise((resolve, reject) => {
      function step(key, arg) {
        let info, value;
        try {
          info = gen[key](arg);
          value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
              value => {
                step('next', value);
              },
              err => {
                step('throw', err);
              });
        }
      }
      return step('next');
    });
  })(function*(){
      // Touches appear to be lost during the first frame after navigation.
      // This waits a frame before sending the tap.
      // @see https://crbug.com/613219
      (yield this._client.send('Runtime.evaluate', {
        expression: 'new Promise(x => requestAnimationFrame(() => requestAnimationFrame(x)))',
        awaitPromise: true
      }));
  
      const touchPoints = [{x: Math.round(x), y: Math.round(y)}];
      (yield this._client.send('Input.dispatchTouchEvent', {
        type: 'touchStart',
        touchPoints,
        modifiers: this._keyboard._modifiers
      }));
      (yield this._client.send('Input.dispatchTouchEvent', {
        type: 'touchEnd',
        touchPoints: [],
        modifiers: this._keyboard._modifiers
      }));
    });}
  }
  
  module.exports = { Keyboard, Mouse, Touchscreen};
  helper.tracePublicAPI(Keyboard);
  helper.tracePublicAPI(Mouse);
  helper.tracePublicAPI(Touchscreen);
  