HarmonyOS NEXT 使用Web自定义长按菜单案例

Web({ src: $rawfile("index.html"), controller: this.controller })
  .bindPopup(this.showMenu,
    {
      builder: this.MenuBuilder(),
      enableArrow: false,
      placement: Placement.LeftTop,
      mask: false,
      onStateChange: (e) => {
        if (!e.isVisible) {
          this.showMenu = false;
          this.result!.closeContextMenu();
        }
      }
    })

// TODO: 知识点: 长按或者鼠标右键触发该事件，当前只对图片、链接有效。
.onContextMenuShow((event) => {
  if (event) {
    this.result = event.result;
    this.param = event.param;
    logger.info(TAG, "x coord = " + event.param.x());
    logger.info(TAG, "y coord = " + event.param.y());
    logger.info(TAG, "link url = " + event.param.getLinkUrl())
    this.linkUrl = event.param.getLinkUrl();
    this.inputType = this.param.getInputFieldType();
  }
  logger.info(TAG, TAG, `x: ${this.offsetX}, y: ${this.offsetY}`);
  this.showMenu = true;
  return true;
})

Menu() {
  // 如果元素存在图片
  if (this.param?.existsImageContents()) {
    MenuItem({
      content: $r('app.string.copy_image'),
    })
      .onClick(() => {
        this.result?.copyImage();
        this.showMenu = false;
      })
  }
  // 如果元素可剪切
  if (this.param?.getEditStateFlags() === ContextMenuEditStateFlags.CAN_CUT) {
    MenuItem({
      content: $r('app.string.cut'),
    })
      .onClick(() => {
        this.result?.cut();
        this.showMenu = false;
      })
  }
  // 如果元素可拷贝
  if (this.param?.getEditStateFlags() === ContextMenuEditStateFlags.CAN_PASTE) {
    MenuItem({
      content: $r('app.string.copy'),
    })
      .onClick(() => {
        this.result?.copy();
        this.showMenu = false;
      })
  }
  // 如果元素可粘贴
  if (this.param?.getEditStateFlags() === ContextMenuEditStateFlags.CAN_PASTE) {
    MenuItem({
      content: $r('app.string.paste'),
    })
      .onClick(() => {
        this.result?.paste();
        this.showMenu = false;
      })
  }
  // 如果元素可全选
  if (this.param?.getEditStateFlags() === ContextMenuEditStateFlags.CAN_PASTE) {
    MenuItem({
      content: $r('app.string.select_all'),
    })
      .onClick(() => {
        this.result?.selectAll();
        this.showMenu = false;
      })
  }
  // 如果元素为链接
  if (this.linkUrl) {
    // 浏览器打开链接
    MenuItem({
      content: $r('app.string.open_link'),
    })
      .onClick(() => {
        let wantInfo: Want = {
          action: 'ohos.want.action.viewData',
          entities: ['entity.system.browsable'],
          uri: this.linkUrl
        };
        this.context.startAbility(wantInfo).then(() => {
          logger.info(TAG, 'startAbility succeed');
        }).catch((err: BusinessError) => {
          logger.error(TAG, `startAbility failed, code is ${err.code}, message is ${err.message}`);
          return;
        });
        this.showMenu = false;
      })
    // 复制链接
    MenuItem({
      content: $r('app.string.copy_link'),
    })
      .onClick(() => {
        let pasteData = pasteboard.createData('text/plain', this.linkUrl);
        pasteboard.getSystemPasteboard().setData(pasteData, (error) => {
          if (error) {
            logger.error(TAG, 'Failed to set PasteData. Cause: ' + error.message);
            return;
          }
          logger.info(TAG, 'Succeeded in setting PasteData.');
        });
        this.showMenu = false;
      })
  }
  // 判断是否输入框
  if (this.inputType != ContextMenuInputFieldType.None) {
    MenuItem({
      content: $r('app.string.input_field'),
    })
      .onClick(() => {
        this.showMenu = false;
      })
  }
}

let offset: Position = { x: 0, y: 0};
if (this.pressPosX <= this.webWidth / 2) {
  offset.x = -(this.webWidth / 2 - this.pressPosX) + popupWidth / 2 + FINGER_OFFSET_X;
} else {
  offset.x = -(this.webWidth / 2 - this.pressPosX) - popupWidth / 2 - FINGER_OFFSET_X;
}
if (this.pressPosY <= this.webHeight / 2) {
  offset.y = -(this.webHeight / 2 - this.pressPosY) + popupHeight / 2 + FINGER_OFFSET_Y;
} else {
  offset.y = (this.pressPosY - this.webHeight / 2) - popupHeight / 2 - FINGER_OFFSET_Y;
}
logger.debug(TAG, `popup offset: ${offset.x}, ${offset.y}`);
return offset;
}

webcustompressmenu      // HAR类型
  ├─mainpage
  │ └─MainPage.ets      // ArkTS页面
  ├─rawfile
  │ └─index.html        // HTML页面