react:material-ui源码解析（持续更新）
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本文主要对基于react的UI库 material-ui源码分析，重点关注组件设计方面，学习其抽取组件和主题的思想。 技术栈react-material-ui是基于react的UI库。
目录结构src目录是组件实现源码，下面对其进行介绍。 styles：样式baseThemes下是内置的两个主题，默认使用的是lightBaseTheme。 getMuiTheme.js基于lightBaseTheme基础主题构成不同组件的样式主题。 appBar: {
color: palette.primary1Color,textColor: palette.alternateTextColor,height: spacing.desktopKeylineIncrement,titleFontWeight: typography.fontWeightNormal,padding: spacing.desktopGutter,},
getMuiTheme提供了定制主题的方法： const muiTheme = getMuiTheme({
palette: {
accent1Color: deepOrange500,});
MuiThemeProvider.js主题提供者。通过getMuiTheme定制一个自定义主题，然后作为属性muiTheme传递给MuiThemeProvider。如果没有传递muiTheme属性，MuiThemeProvider则调用getMuiTheme 生成默认的muiTheme。 const App = () => (
<MuiThemeProvider muiTheme={muiTheme}>
<RootComponent />
</MuiThemeProvider>
);
style下还定义了组件库使用到的颜色、间隔、z-index和transition。 utils该目录下主要抽取了一些公共的工具方法。 组件解析下面选择AutoComplete组件进行解析，其他组件的封装思路大同小异。 因为样式通过props传递可以进行定制，将每个子组件的事件处理函数也抽取到props中，那么，组件的样式和交互均可高度定制化，自由度相当之高。 static defaultProps = {
anchorOrigin: {
vertical: 'bottom',horizontal: 'left',animated: true,dataSourceConfig: {
text: 'text',value: 'value',disableFocusRipple: true,filter: (searchText,key) => searchText !== '' && key.indexOf(searchText) !== -1,fullWidth: false,open: false,openOnFocus: false,onUpdateInput: () => {},onNewRequest: () => {},searchText: '',menuCloseDelay: 300,targetOrigin: {
vertical: 'top',};
以上是AutoProps抽象的定制参数，其实也是这个组件的API设计。一个组件好不好用，其实取决于API设计的合不合理。 重点我们看一下render方法。 render() {
const {
anchorOrigin,animated,animation,dataSource,dataSourceConfig,// eslint-disable-line no-unused-vars
disableFocusRipple,errorStyle,floatingLabelText,filter,fullWidth,style,hintText,maxSearchResults,menuCloseDelay,// eslint-disable-line no-unused-vars
textFieldStyle,menuStyle,menuProps,listStyle,targetOrigin,onClose,// eslint-disable-line no-unused-vars
onNewRequest,// eslint-disable-line no-unused-vars
onUpdateInput,// eslint-disable-line no-unused-vars
openOnFocus,// eslint-disable-line no-unused-vars
popoverProps,searchText: searchTextProp,// eslint-disable-line no-unused-vars
...other
} = this.props;
const {
style: popoverStyle,...popoverOther
} = popoverProps || {};
const {
open,anchorEl,searchText,focusTextField,} = this.state;
const {prepareStyles} = this.context.muiTheme;
const styles = getStyles(this.props,this.context,this.state);
const requestsList = [];
dataSource.every((item,index) => {
switch (typeof item) {
case 'string':
if (filter(searchText,item,item)) {
requestsList.push({
text: item,value: (
<MenuItem
innerDivStyle={styles.innerDiv}
value={item}
primaryText={item}
disableFocusRipple={disableFocusRipple}
key={index}
/>),});
}
break;
case 'object':
if (item && typeof item[this.props.dataSourceConfig.text] === 'string') {
const itemText = item[this.props.dataSourceConfig.text];
if (!this.props.filter(searchText,itemText,item)) break;
const itemValue = item[this.props.dataSourceConfig.value];
if (itemValue.type && (itemValue.type.muiName === MenuItem.muiName ||
itemValue.type.muiName === Divider.muiName)) {
requestsList.push({
text: itemText,value: React.cloneElement(itemValue,{
key: index,disableFocusRipple: disableFocusRipple,}),});
} else {
requestsList.push({
text: itemText,value: (
<MenuItem
innerDivStyle={styles.innerDiv}
primaryText={itemText}
disableFocusRipple={disableFocusRipple}
key={index}
/>),});
}
}
break;
default:
// Do nothing
}
return !(maxSearchResults && maxSearchResults > 0 && requestsList.length === maxSearchResults);
});
this.requestsList = requestsList;
const menu = open && requestsList.length > 0 && (
<Menu
{...menuProps}
ref="menu"
autoWidth={false}
disableAutoFocus={focusTextField}
onEscKeyDown={this.handleEscKeyDown}
initiallyKeyboardFocused={true}
onItemTouchTap={this.handleItemTouchTap}
onMouseDown={this.handleMouseDown}
style={Object.assign(styles.menu,menuStyle)}
listStyle={Object.assign(styles.list,listStyle)}
>
{requestsList.map((i) => i.value)}
</Menu>
);
return (
<div style={prepareStyles(Object.assign(styles.root,style))} >
<TextField
{...other}
ref="searchTextField"
autoComplete="off"
value={searchText}
onChange={this.handleChange}
onBlur={this.handleBlur}
onFocus={this.handleFocus}
onKeyDown={this.handleKeyDown}
floatingLabelText={floatingLabelText}
hintText={hintText}
fullWidth={fullWidth}
multiLine={false}
errorStyle={errorStyle}
style={textFieldStyle}
/>
<Popover
style={Object.assign({},styles.popover,popoverStyle)}
canAutoPosition={false}
anchorOrigin={anchorOrigin}
targetOrigin={targetOrigin}
open={open}
anchorEl={anchorEl}
useLayerForClickAway={false}
onRequestClose={this.handleRequestClose}
animated={animated}
animation={animation}
{...popoverOther}
>
{menu}
</Popover>
</div>
);
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