WIPgit status <Compose> Refactor; <Composer> ed.

3 files changed, 439 insertions, 0 deletions

diff --git a/app/javascript/flavours/glitch/features/composer/textarea/index.js b/app/javascript/flavours/glitch/features/composer/textarea/index.js
new file mode 100644
index 000000000..ad0a35d7f
--- /dev/null
+++ b/app/javascript/flavours/glitch/features/composer/textarea/index.js
@@ -0,0 +1,297 @@
+//  Package imports.
+import PropTypes from 'prop-types';
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import {
+  defineMessages,
+  FormattedMessage,
+} from 'react-intl';
+import Textarea from 'react-textarea-autosize';
+
+//  Components.
+import EmojiPicker from 'flavours/glitch/features/emoji_picker';
+import ComposerTextareaSuggestions from './suggestions';
+
+//  Utils.
+import { isRtl } from 'flavours/glitch/util/rtl';
+import {
+  assignHandlers,
+  hiddenComponent,
+} from 'flavours/glitch/util/react_helpers';
+
+//  Messages.
+const messages = defineMessages({
+  placeholder: {
+    defaultMessage: 'What is on your mind?',
+    id: 'compose_form.placeholder',
+  },
+});
+
+//  Handlers.
+const handlers = {
+
+  //  When blurring the textarea, suggestions are hidden.
+  blur () {
+    this.setState({ suggestionsHidden: true });
+  },
+
+  //  When the contents of the textarea change, we have to pull up new
+  //  autosuggest suggestions if applicable, and also change the value
+  //  of the textarea in our store.
+  change ({
+    target: {
+      selectionStart,
+      value,
+    },
+  }) {
+    const {
+      onChange,
+      onSuggestionsFetchRequested,
+      onSuggestionsClearRequested,
+    } = this.props;
+    const { lastToken } = this.state;
+
+    //  This gets the token at the caret location, if it begins with an
+    //  `@` (mentions) or `:` (shortcodes).
+    const left = value.slice(0, selectionStart).search(/[^\s\u200B]+$/);
+    const right = value.slice(selectionStart).search(/[\s\u200B]/);
+    const token = function () {
+      switch (true) {
+      case left < 0 || /[@:]/.test(!value[left]):
+        return null;
+      case right < 0:
+        return value.slice(left);
+      default:
+        return value.slice(left, right + selectionStart).trim().toLowerCase();
+      }
+    }();
+
+    //  We only request suggestions for tokens which are at least 3
+    //  characters long.
+    if (onSuggestionsFetchRequested && token && token.length >= 3) {
+      if (lastToken !== token) {
+        this.setState({
+          lastToken: token,
+          selectedSuggestion: 0,
+          tokenStart: left,
+        });
+        onSuggestionsFetchRequested(token);
+      }
+    } else {
+      this.setState({ lastToken: null });
+      if (onSuggestionsClearRequested) {
+        onSuggestionsClearRequested();
+      }
+    }
+
+    //  Updates the value of the textarea.
+    if (onChange) {
+      onChange(value);
+    }
+  },
+
+  //  Handles a click on an autosuggestion.
+  clickSuggestion (index) {
+    const { textarea } = this;
+    const {
+      onSuggestionSelected,
+      suggestions,
+    } = this.props;
+    const {
+      lastToken,
+      tokenStart,
+    } = this.state;
+    onSuggestionSelected(tokenStart, lastToken, suggestions.get(index));
+    textarea.focus();
+  },
+
+  //  Handles a keypress.  If the autosuggestions are visible, we need
+  //  to allow keypresses to navigate and sleect them.
+  keyDown (e) {
+    const {
+      disabled,
+      onSubmit,
+      onSuggestionSelected,
+      suggestions,
+    } = this.props;
+    const {
+      lastToken,
+      suggestionsHidden,
+      selectedSuggestion,
+      tokenStart,
+    } = this.state;
+
+    //  Keypresses do nothing if the composer is disabled.
+    if (disabled) {
+      e.preventDefault();
+      return;
+    }
+
+    //  Switches over the pressed key.
+    switch(e.key) {
+
+    //  On arrow down, we pick the next suggestion.
+    case 'ArrowDown':
+      if (suggestions && suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        this.setState({ selectedSuggestion: Math.min(selectedSuggestion + 1, suggestions.size - 1) });
+      }
+      return;
+
+    //  On arrow up, we pick the previous suggestion.
+    case 'ArrowUp':
+      if (suggestions && suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        this.setState({ selectedSuggestion: Math.max(selectedSuggestion - 1, 0) });
+      }
+      return;
+
+    //  On enter or tab, we select the suggestion.
+    case 'Enter':
+    case 'Tab':
+      if (onSuggestionSelected && lastToken !== null && suggestions && suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        e.stopPropagation();
+        onSuggestionSelected(tokenStart, lastToken, suggestions.get(selectedSuggestion));
+      }
+      return;
+    }
+
+    //  We submit the status on control/meta + enter.
+    if (onSubmit && e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
+      onSubmit();
+    }
+  },
+
+  //  When the escape key is released, we either close the suggestions
+  //  window or focus the UI.
+  keyUp ({ key }) {
+    const { suggestionsHidden } = this.state;
+    if (key === 'Escape') {
+      if (!suggestionsHidden) {
+        this.setState({ suggestionsHidden: true });
+      } else {
+        document.querySelector('.ui').parentElement.focus();
+      }
+    }
+  },
+
+  //  Handles the pasting of images into the composer.
+  paste (e) {
+    const { onPaste } = this.props;
+    let d;
+    if (onPaste && (d = e.clipboardData) && (d = d.files).length === 1) {
+      onPaste(d);
+      e.preventDefault();
+    }
+  },
+
+  //  Saves a reference to the textarea.
+  refTextarea (textarea) {
+    this.textarea = textarea;
+  },
+};
+
+//  The component.
+export default class ComposerTextarea extends React.Component {
+
+  //  Constructor.
+  constructor (props) {
+    super(props);
+    assignHandlers(this, handlers);
+    this.state = {
+      suggestionsHidden: false,
+      selectedSuggestion: 0,
+      lastToken: null,
+      tokenStart: 0,
+    };
+
+    //  Instance variables.
+    this.textarea = null;
+  }
+
+  //  When we receive new suggestions, we unhide the suggestions window
+  //  if we didn't have any suggestions before.
+  componentWillReceiveProps (nextProps) {
+    const { suggestions } = this.props;
+    const { suggestionsHidden } = this.state;
+    if (nextProps.suggestions && nextProps.suggestions !== suggestions && nextProps.suggestions.size > 0 && suggestionsHidden) {
+      this.setState({ suggestionsHidden: false });
+    }
+  }
+
+  //  Rendering.
+  render () {
+    const {
+      blur,
+      change,
+      clickSuggestion,
+      keyDown,
+      keyUp,
+      paste,
+      refTextarea,
+    } = this.handlers;
+    const {
+      autoFocus,
+      disabled,
+      intl,
+      onPickEmoji,
+      suggestions,
+      value,
+    } = this.props;
+    const {
+      selectedSuggestion,
+      suggestionsHidden,
+    } = this.state;
+
+    //  The result.
+    return (
+      <div className='autosuggest-textarea'>
+        <label>
+          <span {...hiddenComponent}><FormattedMessage {...messages.placeholder} /></span>
+          <Textarea
+            aria-autocomplete='list'
+            autoFocus={autoFocus}
+            disabled={disabled}
+            inputRef={refTextarea}
+            onBlur={blur}
+            onChange={change}
+            onKeyDown={keyDown}
+            onKeyUp={keyUp}
+            onPaste={paste}
+            placeholder={intl.formatMessage(messages.placeholder)}
+            value={value}
+            style={{ direction: isRtl(value) ? 'rtl' : 'ltr' }}
+          />
+        </label>
+        <EmojiPicker onPickEmoji={onPickEmoji} />
+        <ComposerTextareaSuggestions
+          hidden={suggestionsHidden}
+          onSuggestionClick={clickSuggestion}
+          suggestions={suggestions}
+          value={selectedSuggestion}
+        />
+      </div>
+    );
+  }
+
+}
+
+//  Props.
+ComposerTextarea.propTypes = {
+  autoFocus: PropTypes.bool,
+  disabled: PropTypes.bool,
+  intl: PropTypes.object.isRequired,
+  onChange: PropTypes.func,
+  onPaste: PropTypes.func,
+  onPickEmoji: PropTypes.func,
+  onSubmit: PropTypes.func,
+  onSuggestionsClearRequested: PropTypes.func,
+  onSuggestionsFetchRequested: PropTypes.func,
+  onSuggestionSelected: PropTypes.func,
+  suggestions: ImmutablePropTypes.list,
+  value: PropTypes.string,
+};
+
+//  Default props.
+ComposerTextarea.defaultProps = { autoFocus: true };
diff --git a/app/javascript/flavours/glitch/features/composer/textarea/suggestions/index.js b/app/javascript/flavours/glitch/features/composer/textarea/suggestions/index.js
new file mode 100644
index 000000000..b90696910
--- /dev/null
+++ b/app/javascript/flavours/glitch/features/composer/textarea/suggestions/index.js
@@ -0,0 +1,41 @@
+//  Package imports.
+import classNames from 'classnames';
+import PropTypes from 'prop-types';
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+
+//  Components.
+import ComposerTextareaSuggestionsItem from './item';
+
+//  The component.
+export default function ComposerTextareaSuggestions ({
+  hidden,
+  onSuggestionClick,
+  suggestions,
+  value,
+}) {
+  const computedClass = classNames('comoser--textarea--suggestions', { hidden: hidden || suggestions.isEmpty() });
+
+  return (
+    <div className={computedClass}>
+      {!hidden ? suggestions.map(
+        (suggestion, index) => (
+          <ComposerTextareaSuggestionsItem
+            index={index}
+            key={typeof suggestion === 'object' ? suggestion.id : suggestion}
+            onClick={onSuggestionClick}
+            selected={index === value}
+            suggestion={suggestion}
+          />
+        )
+      ) : null}
+    </div>
+  );
+}
+
+ComposerTextareaSuggestions.propTypes = {
+  hidden: PropTypes.bool,
+  onSuggestionClick: PropTypes.func,
+  suggestions: ImmutablePropTypes.list,
+  value: PropTypes.string,
+};
diff --git a/app/javascript/flavours/glitch/features/composer/textarea/suggestions/item/index.js b/app/javascript/flavours/glitch/features/composer/textarea/suggestions/item/index.js
new file mode 100644
index 000000000..08c99ed0e
--- /dev/null
+++ b/app/javascript/flavours/glitch/features/composer/textarea/suggestions/item/index.js
@@ -0,0 +1,101 @@
+//  Package imports.
+import classNames from 'classnames';
+import PropTypes from 'prop-types';
+import React from 'react';
+
+//  Components.
+import AccountContainer from 'flavours/glitch/containers/account_container';
+
+//  Utils.
+import { unicodeMapping } from 'flavours/glitch/util/emoji/emoji_unicode_mapping_light';
+import { assignHandlers } from 'flavours/glitch/util/react_helpers';
+
+//  Gets our asset host from the environment, if available.
+const assetHost = ((process || {}).env || {}).CDN_HOST || '';
+
+//  Handlers.
+const handlers = {
+
+  //  Handles a click on a suggestion.
+  click (e) {
+    const {
+      index,
+      onClick,
+    } = this.props;
+    if (onClick) {
+      e.preventDefault();
+      onClick(index);
+    }
+  },
+};
+
+//  The component.
+export default class ComposerTextareaSuggestionsItem extends React.Component {
+
+  //  Constructor.
+  constructor (props) {
+    super(props);
+    assignHandlers(this, handlers);
+  }
+
+  //  Rendering.
+  render () {
+    const { click } = this.handlers;
+    const {
+      selected,
+      suggestion,
+    } = this.props;
+    const computedClass = classNames('composer--textarea--suggestions--item', { selected });
+
+    //  The result.
+    return (
+      <div
+        role='button'
+        tabIndex='0'
+        className={computedClass}
+        onMouseDown={click}
+      >
+        { //  If the suggestion is an object, then we render an emoji.
+          //  Otherwise, we render an account.
+          typeof suggestion === 'object' ? function () {
+            const url = function () {
+              if (suggestion.custom) {
+                return suggestion.imageUrl;
+              } else {
+                const mapping = unicodeMapping[suggestion.native] || unicodeMapping[suggestion.native.replace(/\uFE0F$/, '')];
+                if (!mapping) {
+                  return null;
+                }
+                return `${assetHost}/emoji/${mapping.filename}.svg`;
+              }
+            }();
+            return url ? (
+              <div className='emoji'>
+                <img
+                  alt={suggestion.native || suggestion.colons}
+                  className='emojione'
+                  src={url}
+                />
+                {suggestion.colons}
+              </div>
+            ) : null;
+          }() : (
+            <AccountContainer
+              id={suggestion}
+              small
+            />
+          )
+        }
+      </div>
+    );
+  }
+
+}
+
+//  Props.
+ComposerTextareaSuggestionsItem.propTypes = {
+  index: PropTypes.number,
+  onClick: PropTypes.func,
+  selected: PropTypes.bool,
+  suggestion: PropTypes.oneOfType([PropTypes.object, PropTypes.string]),
+};