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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const {
Component,
createFactory,
} = require("devtools/client/shared/vendor/react");
const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
const Tree = createFactory(
require("devtools/client/shared/components/VirtualizedTree")
);
const WaterfallTreeRow = createFactory(
require("devtools/client/performance/components/WaterfallTreeRow")
);
// Keep in sync with var(--waterfall-tree-row-height) in performance.css
const WATERFALL_TREE_ROW_HEIGHT = 15; // px
/**
* Checks if a given marker is in the specified time range.
*
* @param object e
* The marker containing the { start, end } timestamps.
* @param number start
* The earliest allowed time.
* @param number end
* The latest allowed time.
* @return boolean
* True if the marker fits inside the specified time range.
*/
function isMarkerInRange(e, start, end) {
const mStart = e.start | 0;
const mEnd = e.end | 0;
return (
// bounds inside
(mStart >= start && mEnd <= end) ||
// bounds outside
(mStart < start && mEnd > end) ||
// overlap start
(mStart < start && mEnd >= start && mEnd <= end) ||
// overlap end
(mEnd > end && mStart >= start && mStart <= end)
);
}
class WaterfallTree extends Component {
static get propTypes() {
return {
marker: PropTypes.object.isRequired,
startTime: PropTypes.number.isRequired,
endTime: PropTypes.number.isRequired,
dataScale: PropTypes.number.isRequired,
sidebarWidth: PropTypes.number.isRequired,
waterfallWidth: PropTypes.number.isRequired,
onFocus: PropTypes.func,
};
}
constructor(props) {
super(props);
this.state = {
focused: null,
expanded: new Set(),
};
this._getRoots = this._getRoots.bind(this);
this._getParent = this._getParent.bind(this);
this._getChildren = this._getChildren.bind(this);
this._getKey = this._getKey.bind(this);
this._isExpanded = this._isExpanded.bind(this);
this._onExpand = this._onExpand.bind(this);
this._onCollapse = this._onCollapse.bind(this);
this._onFocus = this._onFocus.bind(this);
this._filter = this._filter.bind(this);
this._renderItem = this._renderItem.bind(this);
}
_getRoots(node) {
const roots = this.props.marker.submarkers || [];
return roots.filter(this._filter);
}
/**
* Find the parent node of 'node' with a depth-first search of the marker tree
*/
_getParent(node) {
function findParent(marker) {
if (marker.submarkers) {
for (const submarker of marker.submarkers) {
if (submarker === node) {
return marker;
}
const parent = findParent(submarker);
if (parent) {
return parent;
}
}
}
return null;
}
const rootMarker = this.props.marker;
const parent = findParent(rootMarker);
// We are interested only in parent markers that are rendered,
// which rootMarker is not. Return null if the parent is rootMarker.
return parent !== rootMarker ? parent : null;
}
_getChildren(node) {
const submarkers = node.submarkers || [];
return submarkers.filter(this._filter);
}
_getKey(node) {
return `marker-${node.index}`;
}
_isExpanded(node) {
return this.state.expanded.has(node);
}
_onExpand(node) {
this.setState(state => {
const expanded = new Set(state.expanded);
expanded.add(node);
return { expanded };
});
}
_onCollapse(node) {
this.setState(state => {
const expanded = new Set(state.expanded);
expanded.delete(node);
return { expanded };
});
}
_onFocus(node) {
this.setState({ focused: node });
if (this.props.onFocus) {
this.props.onFocus(node);
}
}
_filter(node) {
const { startTime, endTime } = this.props;
return isMarkerInRange(node, startTime, endTime);
}
_renderItem(marker, level, focused, arrow, expanded) {
const { startTime, dataScale, sidebarWidth } = this.props;
return WaterfallTreeRow({
marker,
level,
arrow,
expanded,
focused,
startTime,
dataScale,
sidebarWidth,
});
}
render() {
return Tree({
preventNavigationOnArrowRight: false,
getRoots: this._getRoots,
getParent: this._getParent,
getChildren: this._getChildren,
getKey: this._getKey,
isExpanded: this._isExpanded,
onExpand: this._onExpand,
onCollapse: this._onCollapse,
onFocus: this._onFocus,
renderItem: this._renderItem,
focused: this.state.focused,
itemHeight: WATERFALL_TREE_ROW_HEIGHT,
});
}
}
module.exports = WaterfallTree;
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