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Viewing file:     index.js (20.38 KB)      -rw-r--r--

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var React = _interopRequireWildcard(_react);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
/* global global */

var KEYCODE_ENTER = 13;
var KEYCODE_TAB = 9;
var KEYCODE_BACKSPACE = 8;
var KEYCODE_Y = 89;
var KEYCODE_Z = 90;
var KEYCODE_M = 77;
var KEYCODE_PARENS = 57;
var KEYCODE_BRACKETS = 219;
var KEYCODE_QUOTE = 222;
var KEYCODE_BACK_QUOTE = 192;
var KEYCODE_ESCAPE = 27;

var HISTORY_LIMIT = 100;
var HISTORY_TIME_GAP = 3000;

var isWindows = 'navigator' in global && /Win/i.test(navigator.platform);
var isMacLike = 'navigator' in global && /(Mac|iPhone|iPod|iPad)/i.test(navigator.platform);

var className = 'npm__react-simple-code-editor__textarea';

var cssText = /* CSS */'\n/**\n * Reset the text fill color so that placeholder is visible\n */\n.' + className + ':empty {\n  -webkit-text-fill-color: inherit !important;\n}\n\n/**\n * Hack to apply on some CSS on IE10 and IE11\n */\n@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {\n  /**\n    * IE doesn\'t support \'-webkit-text-fill-color\'\n    * So we use \'color: transparent\' to make the text transparent on IE\n    * Unlike other browsers, it doesn\'t affect caret color in IE\n    */\n  .' + className + ' {\n    color: transparent !important;\n  }\n\n  .' + className + '::selection {\n    background-color: #accef7 !important;\n    color: transparent !important;\n  }\n}\n';

var Editor = function (_React$Component) {
  _inherits(Editor, _React$Component);

  function Editor() {
    var _ref;

    var _temp, _this, _ret;

    _classCallCheck(this, Editor);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = Editor.__proto__ || Object.getPrototypeOf(Editor)).call.apply(_ref, [this].concat(args))), _this), _this.state = {
      capture: true
    }, _this._recordCurrentState = function () {
      var input = _this._input;

      if (!input) return;

      // Save current state of the input
      var value = input.value,
          selectionStart = input.selectionStart,
          selectionEnd = input.selectionEnd;


      _this._recordChange({
        value: value,
        selectionStart: selectionStart,
        selectionEnd: selectionEnd
      });
    }, _this._getLines = function (text, position) {
      return text.substring(0, position).split('\n');
    }, _this._recordChange = function (record) {
      var overwrite = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
      var _this$_history = _this._history,
          stack = _this$_history.stack,
          offset = _this$_history.offset;


      if (stack.length && offset > -1) {
        // When something updates, drop the redo operations
        _this._history.stack = stack.slice(0, offset + 1);

        // Limit the number of operations to 100
        var count = _this._history.stack.length;

        if (count > HISTORY_LIMIT) {
          var extras = count - HISTORY_LIMIT;

          _this._history.stack = stack.slice(extras, count);
          _this._history.offset = Math.max(_this._history.offset - extras, 0);
        }
      }

      var timestamp = Date.now();

      if (overwrite) {
        var last = _this._history.stack[_this._history.offset];

        if (last && timestamp - last.timestamp < HISTORY_TIME_GAP) {
          // A previous entry exists and was in short interval

          // Match the last word in the line
          var re = /[^a-z0-9]([a-z0-9]+)$/i;

          // Get the previous line
          var previous = _this._getLines(last.value, last.selectionStart).pop().match(re);

          // Get the current line
          var current = _this._getLines(record.value, record.selectionStart).pop().match(re);

          if (previous && current && current[1].startsWith(previous[1])) {
            // The last word of the previous line and current line match
            // Overwrite previous entry so that undo will remove whole word
            _this._history.stack[_this._history.offset] = _extends({}, record, { timestamp: timestamp });

            return;
          }
        }
      }

      // Add the new operation to the stack
      _this._history.stack.push(_extends({}, record, { timestamp: timestamp }));
      _this._history.offset++;
    }, _this._updateInput = function (record) {
      var input = _this._input;

      if (!input) return;

      // Update values and selection state
      input.value = record.value;
      input.selectionStart = record.selectionStart;
      input.selectionEnd = record.selectionEnd;

      _this.props.onValueChange(record.value);
    }, _this._applyEdits = function (record) {
      // Save last selection state
      var input = _this._input;
      var last = _this._history.stack[_this._history.offset];

      if (last && input) {
        _this._history.stack[_this._history.offset] = _extends({}, last, {
          selectionStart: input.selectionStart,
          selectionEnd: input.selectionEnd
        });
      }

      // Save the changes
      _this._recordChange(record);
      _this._updateInput(record);
    }, _this._undoEdit = function () {
      var _this$_history2 = _this._history,
          stack = _this$_history2.stack,
          offset = _this$_history2.offset;

      // Get the previous edit

      var record = stack[offset - 1];

      if (record) {
        // Apply the changes and update the offset
        _this._updateInput(record);
        _this._history.offset = Math.max(offset - 1, 0);
      }
    }, _this._redoEdit = function () {
      var _this$_history3 = _this._history,
          stack = _this$_history3.stack,
          offset = _this$_history3.offset;

      // Get the next edit

      var record = stack[offset + 1];

      if (record) {
        // Apply the changes and update the offset
        _this._updateInput(record);
        _this._history.offset = Math.min(offset + 1, stack.length - 1);
      }
    }, _this._handleKeyDown = function (e) {
      var _this$props = _this.props,
          tabSize = _this$props.tabSize,
          insertSpaces = _this$props.insertSpaces,
          ignoreTabKey = _this$props.ignoreTabKey,
          onKeyDown = _this$props.onKeyDown;


      if (onKeyDown) {
        onKeyDown(e);

        if (e.defaultPrevented) {
          return;
        }
      }

      if (e.keyCode === KEYCODE_ESCAPE) {
        e.target.blur();
      }

      var _e$target = e.target,
          value = _e$target.value,
          selectionStart = _e$target.selectionStart,
          selectionEnd = _e$target.selectionEnd;


      var tabCharacter = (insertSpaces ? ' ' : '\t').repeat(tabSize);

      if (e.keyCode === KEYCODE_TAB && !ignoreTabKey && _this.state.capture) {
        // Prevent focus change
        e.preventDefault();

        if (e.shiftKey) {
          // Unindent selected lines
          var linesBeforeCaret = _this._getLines(value, selectionStart);
          var startLine = linesBeforeCaret.length - 1;
          var endLine = _this._getLines(value, selectionEnd).length - 1;
          var nextValue = value.split('\n').map(function (line, i) {
            if (i >= startLine && i <= endLine && line.startsWith(tabCharacter)) {
              return line.substring(tabCharacter.length);
            }

            return line;
          }).join('\n');

          if (value !== nextValue) {
            var startLineText = linesBeforeCaret[startLine];

            _this._applyEdits({
              value: nextValue,
              // Move the start cursor if first line in selection was modified
              // It was modified only if it started with a tab
              selectionStart: startLineText.startsWith(tabCharacter) ? selectionStart - tabCharacter.length : selectionStart,
              // Move the end cursor by total number of characters removed
              selectionEnd: selectionEnd - (value.length - nextValue.length)
            });
          }
        } else if (selectionStart !== selectionEnd) {
          // Indent selected lines
          var _linesBeforeCaret = _this._getLines(value, selectionStart);
          var _startLine = _linesBeforeCaret.length - 1;
          var _endLine = _this._getLines(value, selectionEnd).length - 1;
          var _startLineText = _linesBeforeCaret[_startLine];

          _this._applyEdits({
            value: value.split('\n').map(function (line, i) {
              if (i >= _startLine && i <= _endLine) {
                return tabCharacter + line;
              }

              return line;
            }).join('\n'),
            // Move the start cursor by number of characters added in first line of selection
            // Don't move it if it there was no text before cursor
            selectionStart: /\S/.test(_startLineText) ? selectionStart + tabCharacter.length : selectionStart,
            // Move the end cursor by total number of characters added
            selectionEnd: selectionEnd + tabCharacter.length * (_endLine - _startLine + 1)
          });
        } else {
          var updatedSelection = selectionStart + tabCharacter.length;

          _this._applyEdits({
            // Insert tab character at caret
            value: value.substring(0, selectionStart) + tabCharacter + value.substring(selectionEnd),
            // Update caret position
            selectionStart: updatedSelection,
            selectionEnd: updatedSelection
          });
        }
      } else if (e.keyCode === KEYCODE_BACKSPACE) {
        var hasSelection = selectionStart !== selectionEnd;
        var textBeforeCaret = value.substring(0, selectionStart);

        if (textBeforeCaret.endsWith(tabCharacter) && !hasSelection) {
          // Prevent default delete behaviour
          e.preventDefault();

          var _updatedSelection = selectionStart - tabCharacter.length;

          _this._applyEdits({
            // Remove tab character at caret
            value: value.substring(0, selectionStart - tabCharacter.length) + value.substring(selectionEnd),
            // Update caret position
            selectionStart: _updatedSelection,
            selectionEnd: _updatedSelection
          });
        }
      } else if (e.keyCode === KEYCODE_ENTER) {
        // Ignore selections
        if (selectionStart === selectionEnd) {
          // Get the current line
          var line = _this._getLines(value, selectionStart).pop();
          var matches = line.match(/^\s+/);

          if (matches && matches[0]) {
            e.preventDefault();

            // Preserve indentation on inserting a new line
            var indent = '\n' + matches[0];
            var _updatedSelection2 = selectionStart + indent.length;

            _this._applyEdits({
              // Insert indentation character at caret
              value: value.substring(0, selectionStart) + indent + value.substring(selectionEnd),
              // Update caret position
              selectionStart: _updatedSelection2,
              selectionEnd: _updatedSelection2
            });
          }
        }
      } else if (e.keyCode === KEYCODE_PARENS || e.keyCode === KEYCODE_BRACKETS || e.keyCode === KEYCODE_QUOTE || e.keyCode === KEYCODE_BACK_QUOTE) {
        var chars = void 0;

        if (e.keyCode === KEYCODE_PARENS && e.shiftKey) {
          chars = ['(', ')'];
        } else if (e.keyCode === KEYCODE_BRACKETS) {
          if (e.shiftKey) {
            chars = ['{', '}'];
          } else {
            chars = ['[', ']'];
          }
        } else if (e.keyCode === KEYCODE_QUOTE) {
          if (e.shiftKey) {
            chars = ['"', '"'];
          } else {
            chars = ["'", "'"];
          }
        } else if (e.keyCode === KEYCODE_BACK_QUOTE && !e.shiftKey) {
          chars = ['`', '`'];
        }

        // If text is selected, wrap them in the characters
        if (selectionStart !== selectionEnd && chars) {
          e.preventDefault();

          _this._applyEdits({
            value: value.substring(0, selectionStart) + chars[0] + value.substring(selectionStart, selectionEnd) + chars[1] + value.substring(selectionEnd),
            // Update caret position
            selectionStart: selectionStart,
            selectionEnd: selectionEnd + 2
          });
        }
      } else if ((isMacLike ? // Trigger undo with ⌘+Z on Mac
      e.metaKey && e.keyCode === KEYCODE_Z : // Trigger undo with Ctrl+Z on other platforms
      e.ctrlKey && e.keyCode === KEYCODE_Z) && !e.shiftKey && !e.altKey) {
        e.preventDefault();

        _this._undoEdit();
      } else if ((isMacLike ? // Trigger redo with ⌘+Shift+Z on Mac
      e.metaKey && e.keyCode === KEYCODE_Z && e.shiftKey : isWindows ? // Trigger redo with Ctrl+Y on Windows
      e.ctrlKey && e.keyCode === KEYCODE_Y : // Trigger redo with Ctrl+Shift+Z on other platforms
      e.ctrlKey && e.keyCode === KEYCODE_Z && e.shiftKey) && !e.altKey) {
        e.preventDefault();

        _this._redoEdit();
      } else if (e.keyCode === KEYCODE_M && e.ctrlKey && (isMacLike ? e.shiftKey : true)) {
        e.preventDefault();

        // Toggle capturing tab key so users can focus away
        _this.setState(function (state) {
          return {
            capture: !state.capture
          };
        });
      }
    }, _this._handleChange = function (e) {
      var _e$target2 = e.target,
          value = _e$target2.value,
          selectionStart = _e$target2.selectionStart,
          selectionEnd = _e$target2.selectionEnd;


      _this._recordChange({
        value: value,
        selectionStart: selectionStart,
        selectionEnd: selectionEnd
      }, true);

      _this.props.onValueChange(value);
    }, _this._history = {
      stack: [],
      offset: -1
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  _createClass(Editor, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this._recordCurrentState();
    }
  }, {
    key: 'render',
    value: function render() {
      var _this2 = this;

      var _props = this.props,
          value = _props.value,
          style = _props.style,
          padding = _props.padding,
          highlight = _props.highlight,
          textareaId = _props.textareaId,
          textareaClassName = _props.textareaClassName,
          autoFocus = _props.autoFocus,
          disabled = _props.disabled,
          form = _props.form,
          maxLength = _props.maxLength,
          minLength = _props.minLength,
          name = _props.name,
          placeholder = _props.placeholder,
          readOnly = _props.readOnly,
          required = _props.required,
          onClick = _props.onClick,
          onFocus = _props.onFocus,
          onBlur = _props.onBlur,
          onKeyUp = _props.onKeyUp,
          onKeyDown = _props.onKeyDown,
          onValueChange = _props.onValueChange,
          tabSize = _props.tabSize,
          insertSpaces = _props.insertSpaces,
          ignoreTabKey = _props.ignoreTabKey,
          preClassName = _props.preClassName,
          rest = _objectWithoutProperties(_props, ['value', 'style', 'padding', 'highlight', 'textareaId', 'textareaClassName', 'autoFocus', 'disabled', 'form', 'maxLength', 'minLength', 'name', 'placeholder', 'readOnly', 'required', 'onClick', 'onFocus', 'onBlur', 'onKeyUp', 'onKeyDown', 'onValueChange', 'tabSize', 'insertSpaces', 'ignoreTabKey', 'preClassName']);

      var contentStyle = {
        paddingTop: padding,
        paddingRight: padding,
        paddingBottom: padding,
        paddingLeft: padding
      };

      var highlighted = highlight(value);

      return React.createElement(
        'div',
        _extends({}, rest, { style: _extends({}, styles.container, style) }),
        React.createElement('textarea', {
          ref: function ref(c) {
            return _this2._input = c;
          },
          style: _extends({}, styles.editor, styles.textarea, contentStyle),
          className: className + (textareaClassName ? ' ' + textareaClassName : ''),
          id: textareaId,
          value: value,
          onChange: this._handleChange,
          onKeyDown: this._handleKeyDown,
          onClick: onClick,
          onKeyUp: onKeyUp,
          onFocus: onFocus,
          onBlur: onBlur,
          disabled: disabled,
          form: form,
          maxLength: maxLength,
          minLength: minLength,
          name: name,
          placeholder: placeholder,
          readOnly: readOnly,
          required: required,
          autoFocus: autoFocus,
          autoCapitalize: 'off',
          autoComplete: 'off',
          autoCorrect: 'off',
          spellCheck: false,
          'data-gramm': false
        }),
        React.createElement('pre', _extends({
          className: preClassName,
          'aria-hidden': 'true',
          style: _extends({}, styles.editor, styles.highlight, contentStyle)
        }, typeof highlighted === 'string' ? { dangerouslySetInnerHTML: { __html: highlighted + '<br />' } } : { children: highlighted })),
        React.createElement('style', { type: 'text/css', dangerouslySetInnerHTML: { __html: cssText } })
      );
    }
  }, {
    key: 'session',
    get: function get() {
      return {
        history: this._history
      };
    },
    set: function set(session) {
      this._history = session.history;
    }
  }]);

  return Editor;
}(React.Component);

Editor.defaultProps = {
  tabSize: 2,
  insertSpaces: true,
  ignoreTabKey: false,
  padding: 0
};
exports.default = Editor;


var styles = {
  container: {
    position: 'relative',
    textAlign: 'left',
    boxSizing: 'border-box',
    padding: 0,
    overflow: 'hidden'
  },
  textarea: {
    position: 'absolute',
    top: 0,
    left: 0,
    height: '100%',
    width: '100%',
    resize: 'none',
    color: 'inherit',
    overflow: 'hidden',
    MozOsxFontSmoothing: 'grayscale',
    WebkitFontSmoothing: 'antialiased',
    WebkitTextFillColor: 'transparent'
  },
  highlight: {
    position: 'relative',
    pointerEvents: 'none'
  },
  editor: {
    margin: 0,
    border: 0,
    background: 'none',
    boxSizing: 'inherit',
    display: 'inherit',
    fontFamily: 'inherit',
    fontSize: 'inherit',
    fontStyle: 'inherit',
    fontVariantLigatures: 'inherit',
    fontWeight: 'inherit',
    letterSpacing: 'inherit',
    lineHeight: 'inherit',
    tabSize: 'inherit',
    textIndent: 'inherit',
    textRendering: 'inherit',
    textTransform: 'inherit',
    whiteSpace: 'pre-wrap',
    wordBreak: 'keep-all',
    overflowWrap: 'break-word'
  }
};
//# sourceMappingURL=index.js.map