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pass heightBefore, scrollTop and viewportHeight to Category

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to support having multiple LazyRenderLists in one viewport
This commit is contained in:
Bruno Windels 2019-10-24 16:02:27 +02:00
parent 00b1816986
commit ea24b8bd58
1 changed files with 40 additions and 8 deletions
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48
src/components/views/emojipicker/EmojiPicker.js
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@ -58,6 +58,10 @@ EMOJIBASE.forEach(emoji => {
emoji.filterString = `${emoji.annotation}\n${emoji.shortcodes.join('\n')}}\n${emoji.emoticon || ''}`;
});
export const CATEGORY_HEADER_HEIGHT = 22;
export const EMOJI_HEIGHT = 37;
export const EMOJIS_PER_ROW = 8;
class EmojiPicker extends React.Component {
static propTypes = {
onChoose: PropTypes.func.isRequired,
@ -71,6 +75,11 @@ class EmojiPicker extends React.Component {
this.state = {
filter: "",
previewEmoji: null,
scrollTop: 0,
// initial estimation of height, dialog is hardcoded to 450px height.
// should be enough to never have blank rows of emojis as
// 3 rows of overflow are also rendered. The actual value is updated on scroll.
viewportHeight: 280,
};
this.recentlyUsed = recent.get().map(unicode => DATA_BY_EMOJI[unicode]);
@ -145,10 +154,20 @@ class EmojiPicker extends React.Component {
this.updateVisibility = this.updateVisibility.bind(this);
}
onScroll = () => {
const body = this.bodyRef.current;
this.setState({
scrollTop: body.scrollTop,
viewportHeight: body.clientHeight,
});
this.updateVisibility();
};
updateVisibility() {
const rect = this.bodyRef.current.getBoundingClientRect();
const body = this.bodyRef.current;
const rect = body.getBoundingClientRect();
for (const cat of this.categories) {
const elem = this.bodyRef.current.querySelector(`[data-category-id="${cat.id}"]`);
const elem = body.querySelector(`[data-category-id="${cat.id}"]`);
if (!elem) {
cat.visible = false;
cat.ref.current.classList.remove("mx_EmojiPicker_anchor_visible");
@ -210,23 +229,36 @@ class EmojiPicker extends React.Component {
}
}
_categoryHeightForEmojiCount(count) {
if (count === 0) {
return 0;
}
return CATEGORY_HEADER_HEIGHT + (Math.ceil(count / EMOJIS_PER_ROW) * EMOJI_HEIGHT);
}
render() {
const Header = sdk.getComponent("emojipicker.Header");
const Search = sdk.getComponent("emojipicker.Search");
const Category = sdk.getComponent("emojipicker.Category");
const Preview = sdk.getComponent("emojipicker.Preview");
const QuickReactions = sdk.getComponent("emojipicker.QuickReactions");
let heightBefore = 0;
return (
<div className="mx_EmojiPicker">
<Header categories={this.categories} defaultCategory="recent" onAnchorClick={this.scrollToCategory} />
<Search query={this.state.filter} onChange={this.onChangeFilter} />
<div className="mx_EmojiPicker_body" ref={this.bodyRef} onScroll={this.updateVisibility}>
{this.categories.map(category => (
<Category key={category.id} id={category.id} name={category.name}
emojis={this.memoizedDataByCategory[category.id]} onClick={this.onClickEmoji}
<div className="mx_EmojiPicker_body" ref={this.bodyRef} onScroll={this.onScroll}>
{this.categories.map(category => {
const emojis = this.memoizedDataByCategory[category.id];
const categoryElement = (<Category key={category.id} id={category.id} name={category.name}
heightBefore={heightBefore} viewportHeight={this.state.viewportHeight}
scrollTop={this.state.scrollTop} emojis={emojis} onClick={this.onClickEmoji}
onMouseEnter={this.onHoverEmoji} onMouseLeave={this.onHoverEmojiEnd}
selectedEmojis={this.props.selectedEmojis} />
))}
selectedEmojis={this.props.selectedEmojis} />);
const height = this._categoryHeightForEmojiCount(emojis.length);
heightBefore += height;
return categoryElement;
})}
</div>
{this.state.previewEmoji || !this.props.showQuickReactions
? <Preview emoji={this.state.previewEmoji} />