feat(module:mention): add mention component

style(module:mention): formatting the code

docs(module:mention): add the docs & demo

refactor(module:mention): refactor

test(module:mention): add test

fix(module:mention): fix getMentions method

components/components.less

@@ -22,6 +22,7 @@
 @import "./layout/style/index.less";
 @import "./list/style/index.less";
 @import "./menu/style/index.less";
+@import "./mention/style/index.less";
 @import "./message/style/index.less";
 @import "./modal/style/index.less";
 @import "./notification/style/index.less";

components/core/overlay/overlay-position-map.ts

@@ -106,6 +106,16 @@ export const DEFAULT_DATEPICKER_POSITIONS = [
   }
 ] as ConnectionPositionPair[];
 
+export const DEFAULT_MENTION_POSITIONS = [
+  POSITION_MAP.bottomLeft,
+  {
+    originX : 'start',
+    originY : 'bottom',
+    overlayX: 'start',
+    overlayY: 'bottom'
+  }
+] as ConnectionPositionPair[];
+
 function arrayMap<T, S>(array: T[], iteratee: (item: T, index: number, arr: T[]) => S): S[] {
   let index = -1;
   const length = array == null ? 0 : array.length;

components/core/util/getMentions.ts

@@ -0,0 +1,20 @@
+
+export function getRegExp(prefix: string | string[]): RegExp {
+  const prefixArray = Array.isArray(prefix) ? prefix : [prefix];
+  let prefixToken = prefixArray.join('').replace(/(\$|\^)/g, '\\$1');
+
+  if (prefixArray.length > 1) {
+    prefixToken = `[${prefixToken}]`;
+  }
+
+  return new RegExp(`(\\s|^)(${prefixToken})[^\\s]*`, 'g');
+}
+
+export function getMentions(value: string, prefix: string | string[] = '@'): string[] {
+  if (typeof value !== 'string') {
+    return [];
+  }
+  const regex = getRegExp(prefix);
+  const mentions = value.match(regex);
+  return mentions !== null ? mentions.map(e => e.trim().substring(1)) : [];
+}

components/core/util/textarea-caret-position.ts

@@ -0,0 +1,161 @@
+// from https://github.com/component/textarea-caret-position
+
+// We'll copy the properties below into the mirror div.
+// Note that some browsers, such as Firefox, do not concatenate properties
+// into their shorthand (e.g. padding-top, padding-bottom etc. -> padding),
+// so we have to list every single property explicitly.
+export const properties = [
+  'direction',  // RTL support
+  'boxSizing',
+  'width',  // on Chrome and IE, exclude the scrollbar, so the mirror div wraps exactly as the textarea does
+  'height',
+  'overflowX',
+  'overflowY',  // copy the scrollbar for IE
+
+  'borderTopWidth',
+  'borderRightWidth',
+  'borderBottomWidth',
+  'borderLeftWidth',
+  'borderStyle',
+
+  'paddingTop',
+  'paddingRight',
+  'paddingBottom',
+  'paddingLeft',
+
+  // https://developer.mozilla.org/en-US/docs/Web/CSS/font
+  'fontStyle',
+  'fontVariant',
+  'fontWeight',
+  'fontStretch',
+  'fontSize',
+  'fontSizeAdjust',
+  'lineHeight',
+  'fontFamily',
+
+  'textAlign',
+  'textTransform',
+  'textIndent',
+  'textDecoration',  // might not make a difference, but better be safe
+
+  'letterSpacing',
+  'wordSpacing',
+
+  'tabSize',
+  'MozTabSize'
+
+];
+
+const isBrowser = (typeof window !== 'undefined');
+
+// tslint:disable-next-line:no-any
+const isFirefox = (isBrowser && (window as any).mozInnerScreenX != null);
+
+const _parseInt = (str: string) => parseInt(str, 10);
+
+export interface Coordinates {
+  top: number;
+  left: number;
+  height: number;
+}
+
+export function getCaretCoordinates(element: HTMLInputElement | HTMLTextAreaElement, position: number, options?: { debug?: boolean }): Coordinates {
+  if (!isBrowser) {
+    throw new Error('textarea-caret-position#getCaretCoordinates should only be called in a browser');
+  }
+
+  const debug = options && options.debug || false;
+  if (debug) {
+    const el = document.querySelector('#input-textarea-caret-position-mirror-div');
+    if (el) { el.parentNode.removeChild(el); }
+  }
+
+  // The mirror div will replicate the textarea's style
+  const div = document.createElement('div');
+  div.id = 'input-textarea-caret-position-mirror-div';
+  document.body.appendChild(div);
+
+  const style = div.style;
+
+  // tslint:disable-next-line:no-any
+  const computed = window.getComputedStyle ? window.getComputedStyle(element) : (element as any).currentStyle;  // currentStyle for IE < 9
+  const isInput = element.nodeName === 'INPUT';
+
+  // Default textarea styles
+  style.whiteSpace = 'pre-wrap';
+  if (!isInput) {
+    style.wordWrap = 'break-word'; // only for textarea-s
+  }
+
+  // Position off-screen
+  style.position = 'absolute';  // required to return coordinates properly
+  if (!debug) {
+    style.visibility = 'hidden';
+  }  // not 'display: none' because we want rendering
+
+  // Transfer the element's properties to the div
+  properties.forEach((prop: string) => {
+    if (isInput && prop === 'lineHeight') {
+      // Special case for <input>s because text is rendered centered and line height may be != height
+      style.lineHeight = computed.height;
+    } else {
+      style[prop] = computed[prop];
+    }
+  });
+
+  if (isFirefox) {
+    // Firefox lies about the overflow property for textareas: https://bugzilla.mozilla.org/show_bug.cgi?id=984275
+    if (element.scrollHeight > _parseInt(computed.height)) {
+      style.overflowY = 'scroll';
+    }
+  } else {
+    style.overflow = 'hidden';  // for Chrome to not render a scrollbar; IE keeps overflowY = 'scroll'
+  }
+
+  div.textContent = element.value.substring(0, position);
+  // The second special handling for input type="text" vs textarea:
+  // spaces need to be replaced with non-breaking spaces - http://stackoverflow.com/a/13402035/1269037
+  if (isInput) {
+    div.textContent = div.textContent.replace(/\s/g, '\u00a0');
+  }
+
+  const span = document.createElement('span');
+  // Wrapping must be replicated *exactly*, including when a long word gets
+  // onto the next line, with whitespace at the end of the line before (#7).
+  // The  *only* reliable way to do that is to copy the *entire* rest of the
+  // textarea's content into the <span> created at the caret position.
+  // For inputs, just '.' would be enough, but no need to bother.
+  span.textContent = element.value.substring(position) || '.';  // || because a completely empty faux span doesn't render at all
+  div.appendChild(span);
+
+  const coordinates = {
+    top: span.offsetTop + _parseInt(computed.borderTopWidth),
+    left: span.offsetLeft + _parseInt(computed.borderLeftWidth),
+    height: _parseInt(computed.lineHeight)
+  };
+
+  if (debug) {
+    span.style.backgroundColor = '#eee';
+    createDebugEle(element, coordinates);
+  } else {
+    document.body.removeChild(div);
+  }
+
+  return coordinates;
+}
+
+export function createDebugEle(element: HTMLInputElement | HTMLTextAreaElement, coordinates: Coordinates): void {
+  const fontSize = getComputedStyle(element).getPropertyValue('font-size');
+  const rect: HTMLSpanElement = (document.querySelector('#DEBUG') as HTMLSpanElement)
+    || document.createElement('div');
+  document.body.appendChild(rect);
+  rect.id = 'DEBUG';
+  rect.style.position = 'absolute';
+  rect.style.backgroundColor = 'red';
+  rect.style.height = fontSize;
+  rect.style.width = '1px';
+  rect.style.top = `${element.getBoundingClientRect().top - element.scrollTop + window.pageYOffset + coordinates.top}px`;
+  rect.style.left = `${element.getBoundingClientRect().left - element.scrollLeft + window.pageXOffset + coordinates.left}px`;
+  console.log(rect.style.top);
+  console.log(rect.style.left);
+}

components/mention/demo/async.md

@@ -0,0 +1,15 @@
+---
+order: 1
+title:
+  zh-CN: 异步加载
+  en-US: Asynchronous loading
+---
+
+## zh-CN
+
+匹配内容列表为异步返回时。
+
+## en-US
+
+async
+

components/mention/demo/async.ts

@@ -0,0 +1,39 @@
+import { Component, ViewEncapsulation } from '@angular/core';
+
+@Component({
+  selector     : 'nz-demo-mention-async',
+  encapsulation: ViewEncapsulation.None,
+  template     : `
+  <nz-mention
+    [nzSuggestions]="suggestions"
+    [nzLoading]="loading"
+    (nzOnSearchChange)="onSearchChange($event)">
+    <input
+      nzMentionTrigger
+      nz-input
+      [(ngModel)]="inputValue">
+  </nz-mention>
+`
+})
+export class NzDemoMentionAsyncComponent {
+  inputValue: string;
+  loading = false;
+  suggestions = [];
+
+  onSearchChange(value: string): void {
+    console.log(`search: ${value}`);
+    this.loading = true;
+    this.fetchSuggestions(value, (suggestions) => {
+      console.log(suggestions);
+      this.suggestions = suggestions;
+      this.loading = false;
+    });
+  }
+
+  fetchSuggestions(value: string, callback: (suggestions: string[]) => void): void {
+    const users = ['afc163', 'benjycui', 'yiminghe', 'jljsj33', 'dqaria', 'RaoHai'];
+    setTimeout(() => {
+      return callback(users.filter(item => item.indexOf(value) !== -1));
+    }, 500);
+  }
+}

components/mention/demo/avatar.md

@@ -0,0 +1,16 @@
+---
+order: 3
+title:
+  zh-CN: 头像
+  en-US: Icon Image
+---
+
+## zh-CN
+
+自定义建议（含头像）
+
+注意，`nzSuggestions` 不为 `string[]` 时，需要提供 `valueWith`。
+
+## en-US
+
+Customize suggestions.

components/mention/demo/avatar.ts

@@ -0,0 +1,44 @@
+import { Component, ViewEncapsulation } from '@angular/core';
+
+@Component({
+  selector     : 'nz-demo-mention-avatar',
+  encapsulation: ViewEncapsulation.None,
+  template     : `
+  <nz-mention
+    [nzSuggestions]="webFrameworks"
+    [nzValueWith]="valueWith"
+    (nzOnSelect)="onSelect($event)">
+    <input
+      nz-input
+      nzMentionTrigger
+      [(ngModel)]="inputValue">
+    <ng-container *nzMentionSuggestion="let framework">
+      <nz-avatar nzSize="small" [nzText]="framework.name" [nzSrc]="framework.icon"></nz-avatar>
+      <span>{{ framework.name }} - {{ framework.type }}</span>
+    </ng-container>
+  </nz-mention>
+`,
+  styles: [`
+    .ant-avatar.ant-avatar-sm {
+      width: 14px;
+      height: 14px;
+      margin-right: 8px;
+      position: relative
+    }
+  `]
+})
+export class NzDemoMentionAvatarComponent {
+  inputValue: string;
+  webFrameworks = [
+    { name: 'React', type: 'JavaScript', icon: 'https://zos.alipayobjects.com/rmsportal/LFIeMPzdLcLnEUe.svg' },
+    { name: 'Angular', type: 'JavaScript', icon: 'https://zos.alipayobjects.com/rmsportal/PJTbxSvzYWjDZnJ.png' },
+    { name: 'Dva', type: 'Javascript', icon: 'https://zos.alipayobjects.com/rmsportal/EYPwSeEJKxDtVxI.png' },
+    { name: 'Flask', type: 'Python', icon: 'https://zos.alipayobjects.com/rmsportal/xaypBUijfnpAlXE.png' },
+  ];
+
+  valueWith = data => data.name;
+
+  onSelect(value: string): void {
+    console.log(value);
+  }
+}

components/mention/demo/basic.md

@@ -0,0 +1,14 @@
+---
+order: 0
+title:
+  zh-CN: 基本使用
+  en-US: Basic
+---
+
+## zh-CN
+
+基本使用
+
+## en-US
+
+Basic usage.

components/mention/demo/basic.ts

@@ -0,0 +1,31 @@
+import { Component, ViewEncapsulation } from '@angular/core';
+
+@Component({
+  selector     : 'nz-demo-mention-basic',
+  encapsulation: ViewEncapsulation.None,
+  template     : `
+  <nz-mention
+    [nzSuggestions]="suggestions"
+    (nzOnSelect)="onSelect($event)">
+    <input
+      placeholder="input here"
+      nzMentionTrigger
+      nz-input
+      [(ngModel)]="inputValue"
+      (ngModelChange)="onChange($event)"
+    >
+  </nz-mention>
+`
+})
+export class NzDemoMentionBasicComponent {
+  inputValue: string = '@afc163';
+  suggestions = ['afc163', 'benjycui', 'yiminghe', 'RaoHai', '中文', 'にほんご'];
+
+  onChange(value: string): void {
+    console.log(value);
+  }
+
+  onSelect(suggestion: string): void {
+    console.log(`onSelect ${suggestion}`);
+  }
+}

components/mention/demo/controlled.md

@@ -0,0 +1,14 @@
+---
+order: 4
+title:
+  zh-CN: 配合 Form 使用
+  en-US: With Form
+---
+
+## zh-CN
+
+受控模式，例如配合 Form 使用。
+
+## en-US
+
+Controlled mode, for example, to work with `Form`.