1 files changed, 212 insertions, 0 deletions
diff --git a/app/javascript/mastodon/components/column_header.jsx b/app/javascript/mastodon/components/column_header.jsx
new file mode 100644
index 000000000..afc526f27
--- /dev/null
+++ b/app/javascript/mastodon/components/column_header.jsx
@@ -0,0 +1,212 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { createPortal } from 'react-dom';
+import classNames from 'classnames';
+import { FormattedMessage, injectIntl, defineMessages } from 'react-intl';
+import Icon from 'mastodon/components/icon';
+
+const messages = defineMessages({
+  show: { id: 'column_header.show_settings', defaultMessage: 'Show settings' },
+  hide: { id: 'column_header.hide_settings', defaultMessage: 'Hide settings' },
+  moveLeft: { id: 'column_header.moveLeft_settings', defaultMessage: 'Move column to the left' },
+  moveRight: { id: 'column_header.moveRight_settings', defaultMessage: 'Move column to the right' },
+});
+
+class ColumnHeader extends React.PureComponent {
+
+  static contextTypes = {
+    router: PropTypes.object,
+    identity: PropTypes.object,
+  };
+
+  static propTypes = {
+    intl: PropTypes.object.isRequired,
+    title: PropTypes.node,
+    icon: PropTypes.string,
+    active: PropTypes.bool,
+    multiColumn: PropTypes.bool,
+    extraButton: PropTypes.node,
+    showBackButton: PropTypes.bool,
+    children: PropTypes.node,
+    pinned: PropTypes.bool,
+    placeholder: PropTypes.bool,
+    onPin: PropTypes.func,
+    onMove: PropTypes.func,
+    onClick: PropTypes.func,
+    appendContent: PropTypes.node,
+    collapseIssues: PropTypes.bool,
+  };
+
+  state = {
+    collapsed: true,
+    animating: false,
+  };
+
+  handleToggleClick = (e) => {
+    e.stopPropagation();
+    this.setState({ collapsed: !this.state.collapsed, animating: true });
+  };
+
+  handleTitleClick = () => {
+    this.props.onClick?.();
+  };
+
+  handleMoveLeft = () => {
+    this.props.onMove(-1);
+  };
+
+  handleMoveRight = () => {
+    this.props.onMove(1);
+  };
+
+  handleBackClick = () => {
+    if (window.history && window.history.state) {
+      this.context.router.history.goBack();
+    } else {
+      this.context.router.history.push('/');
+    }
+  };
+
+  handleTransitionEnd = () => {
+    this.setState({ animating: false });
+  };
+
+  handlePin = () => {
+    if (!this.props.pinned) {
+      this.context.router.history.replace('/');
+    }
+
+    this.props.onPin();
+  };
+
+  render () {
+    const { title, icon, active, children, pinned, multiColumn, extraButton, showBackButton, intl: { formatMessage }, placeholder, appendContent, collapseIssues } = this.props;
+    const { collapsed, animating } = this.state;
+
+    const wrapperClassName = classNames('column-header__wrapper', {
+      'active': active,
+    });
+
+    const buttonClassName = classNames('column-header', {
+      'active': active,
+    });
+
+    const collapsibleClassName = classNames('column-header__collapsible', {
+      'collapsed': collapsed,
+      'animating': animating,
+    });
+
+    const collapsibleButtonClassName = classNames('column-header__button', {
+      'active': !collapsed,
+    });
+
+    let extraContent, pinButton, moveButtons, backButton, collapseButton;
+
+    if (children) {
+      extraContent = (
+        <div key='extra-content' className='column-header__collapsible__extra'>
+          {children}
+        </div>
+      );
+    }
+
+    if (multiColumn && pinned) {
+      pinButton = <button key='pin-button' className='text-btn column-header__setting-btn' onClick={this.handlePin}><Icon id='times' /> <FormattedMessage id='column_header.unpin' defaultMessage='Unpin' /></button>;
+
+      moveButtons = (
+        <div key='move-buttons' className='column-header__setting-arrows'>
+          <button title={formatMessage(messages.moveLeft)} aria-label={formatMessage(messages.moveLeft)} className='icon-button column-header__setting-btn' onClick={this.handleMoveLeft}><Icon id='chevron-left' /></button>
+          <button title={formatMessage(messages.moveRight)} aria-label={formatMessage(messages.moveRight)} className='icon-button column-header__setting-btn' onClick={this.handleMoveRight}><Icon id='chevron-right' /></button>
+        </div>
+      );
+    } else if (multiColumn && this.props.onPin) {
+      pinButton = <button key='pin-button' className='text-btn column-header__setting-btn' onClick={this.handlePin}><Icon id='plus' /> <FormattedMessage id='column_header.pin' defaultMessage='Pin' /></button>;
+    }
+
+    if (!pinned && (multiColumn || showBackButton)) {
+      backButton = (
+        <button onClick={this.handleBackClick} className='column-header__back-button'>
+          <Icon id='chevron-left' className='column-back-button__icon' fixedWidth />
+          <FormattedMessage id='column_back_button.label' defaultMessage='Back' />
+        </button>
+      );
+    }
+
+    const collapsedContent = [
+      extraContent,
+    ];
+
+    if (multiColumn) {
+      collapsedContent.push(pinButton);
+      collapsedContent.push(moveButtons);
+    }
+
+    if (this.context.identity.signedIn && (children || (multiColumn && this.props.onPin))) {
+      collapseButton = (
+        <button
+          className={collapsibleButtonClassName}
+          title={formatMessage(collapsed ? messages.show : messages.hide)}
+          aria-label={formatMessage(collapsed ? messages.show : messages.hide)}
+          onClick={this.handleToggleClick}
+        >
+          <i className='icon-with-badge'>
+            <Icon id='sliders' />
+            {collapseIssues && <i className='icon-with-badge__issue-badge' />}
+          </i>
+        </button>
+      );
+    }
+
+    const hasTitle = icon && title;
+
+    const component = (
+      <div className={wrapperClassName}>
+        <h1 className={buttonClassName}>
+          {hasTitle && (
+            <button onClick={this.handleTitleClick}>
+              <Icon id={icon} fixedWidth className='column-header__icon' />
+              {title}
+            </button>
+          )}
+
+          {!hasTitle && backButton}
+
+          <div className='column-header__buttons'>
+            {hasTitle && backButton}
+            {extraButton}
+            {collapseButton}
+          </div>
+        </h1>
+
+        <div className={collapsibleClassName} tabIndex={collapsed ? -1 : null} onTransitionEnd={this.handleTransitionEnd}>
+          <div className='column-header__collapsible-inner'>
+            {(!collapsed || animating) && collapsedContent}
+          </div>
+        </div>
+
+        {appendContent}
+      </div>
+    );
+
+    if (multiColumn || placeholder) {
+      return component;
+    } else {
+      // The portal container and the component may be rendered to the DOM in
+      // the same React render pass, so the container might not be available at
+      // the time `render()` is called.
+      const container = document.getElementById('tabs-bar__portal');
+      if (container === null) {
+        // The container wasn't available, force a re-render so that the
+        // component can eventually be inserted in the container and not scroll
+        // with the rest of the area.
+        this.forceUpdate();
+        return component;
+      } else {
+        return createPortal(component, container);
+      }
+    }
+  }
+
+}
+
+export default injectIntl(ColumnHeader);