applet.js
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const BaseTheme = MiniRefreshTools.theme.defaults;
const version = MiniRefreshTools.version;
const extend = MiniRefreshTools.extend;
const namespace = MiniRefreshTools.namespace;
/**
* 一些默认提供的CSS类，一般来说不会变动（由框架提供的）
* theme字段会根据不同的主题有不同值
*/
const CLASS_THEME = 'minirefresh-theme-applet';
const CLASS_DOWN_WRAP = 'minirefresh-downwrap';
const CLASS_HARDWARE_SPEEDUP = 'minirefresh-hardware-speedup';
/**
* 本主题的特色样式
*/
const CLASS_DOWN_LOADING = 'loading-applet';
const CLASS_STATUS_DEFAULT = 'status-default';
const CLASS_STATUS_PULL = 'status-pull';
const CLASS_STATUS_LOADING = 'status-loading';
const CLASS_STATUS_SUCCESS = 'status-success';
const CLASS_STATUS_ERROR = 'status-error';
/**
* 一些常量
*/
const DEFAULT_DOWN_HEIGHT = 50;
const defaultSetting = {
down: {
successAnim: {
// 微信小程序没有successAnim 也没有文字提示
isEnable: false,
},
// 继承了default的downWrap部分代码，需要这个变量
isWrapCssTranslate: true,
},
};
class MiniRefreshTheme extends BaseTheme {
constructor(options) {
const newOptions = extend(true, {}, defaultSetting, options);
super(newOptions);
}
/**
* 重写下拉刷新初始化，变为小程序自己的动画
*/
_initDownWrap() {
const container = this.container;
const contentWrap = this.contentWrap;
const downWrap = document.createElement('div');
downWrap.className = `${CLASS_DOWN_WRAP} ${CLASS_HARDWARE_SPEEDUP}`;
downWrap.innerHTML = `
<div class="downwrap-content ball-beat">
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
</div>
`;
container.insertBefore(downWrap, contentWrap);
// 由于直接继承的default，所以其实已经有default主题了，这里再加上本主题样式
container.classList.add(CLASS_THEME);
this.downWrap = downWrap;
// 是否能下拉的变量，控制pull时的状态转变
this.isCanPullDown = false;
// 留一个默认值，以免样式被覆盖，无法获取
this.downWrapHeight = this.downWrap.offsetHeight || DEFAULT_DOWN_HEIGHT;
this._transformDownWrap(-1 * this.downWrapHeight);
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_DEFAULT);
}
_transformDownWrap(offset, duration) {
super._transformDownWrap(offset, duration);
}
/**
* 重写下拉过程动画
* @param {Number} downHight 当前下拉的高度
* @param {Number} downOffset 下拉的阈值
*/
_pullHook(downHight, downOffset) {
if (downHight < downOffset) {
const rate = downHight / downOffset;
const offset = this.downWrapHeight * (-1 + rate);
this._transformDownWrap(offset);
if (this.isCanPullDown) {
this.isCanPullDown = false;
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_DEFAULT);
}
} else {
this._transformDownWrap(0);
if (!this.isCanPullDown) {
this.isCanPullDown = true;
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_PULL);
}
}
}
/**
* 重写下拉动画
*/
_downLoaingHook() {
this.downWrap.classList.add(CLASS_DOWN_LOADING);
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_LOADING);
}
/**
* 重写success 但是什么都不做
*/
_downLoaingSuccessHook(isSuccess) {
// 只改变状态
BaseTheme._changeWrapStatusClass(
this.downWrap,
isSuccess ? CLASS_STATUS_SUCCESS : CLASS_STATUS_ERROR);
}
/**
* 重写下拉end
*/
_downLoaingEndHook() {
this.downWrap.classList.remove(CLASS_DOWN_LOADING);
this._transformDownWrap(-1 * this.downWrapHeight, this.options.down.bounceTime);
// 需要重置回来
this.isCanPullDown = false;
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_DEFAULT);
}
/**
* 取消loading的回调
*/
_cancelLoaingHook() {
this._transformDownWrap(-1 * this.downWrapHeight, this.options.down.bounceTime);
BaseTheme._changeWrapStatusClass(this.downWrap, CLASS_STATUS_DEFAULT);
}
}
MiniRefreshTheme.sign = 'applet';
MiniRefreshTheme.version = version;
namespace('theme.applet', MiniRefreshTheme);
export default MiniRefreshTheme;