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//React utils. For other utilities, see ../utils.js
// http://blog.vjeux.com/2013/javascript/scroll-position-with-react.html (also contains inverse example)
var AutoScrollMixin = {
componentWillUpdate: function () {
var node = this.getDOMNode();
this._shouldScrollBottom = (
node.scrollTop !== 0 &&
node.scrollTop + node.clientHeight === node.scrollHeight
);
},
componentDidUpdate: function () {
if (this._shouldScrollBottom) {
var node = this.getDOMNode();
node.scrollTop = node.scrollHeight;
}
},
};
var StickyHeadMixin = {
adjustHead: function () {
// Abusing CSS transforms to set the element
// referenced as head into some kind of position:sticky.
var head = this.refs.head.getDOMNode();
head.style.transform = "translate(0," + this.getDOMNode().scrollTop + "px)";
}
};
var Navigation = _.extend({}, ReactRouter.Navigation, {
setQuery: function (dict) {
var q = this.context.getCurrentQuery();
for(var i in dict){
if(dict.hasOwnProperty(i)){
q[i] = dict[i] || undefined; //falsey values shall be removed.
}
}
q._ = "_"; // workaround for https://github.com/rackt/react-router/pull/599
this.replaceWith(this.context.getCurrentPath(), this.context.getCurrentParams(), q);
},
replaceWith: function(routeNameOrPath, params, query) {
if(routeNameOrPath === undefined){
routeNameOrPath = this.context.getCurrentPath();
}
if(params === undefined){
params = this.context.getCurrentParams();
}
if(query === undefined){
query = this.context.getCurrentQuery();
}
ReactRouter.Navigation.replaceWith.call(this, routeNameOrPath, params, query);
}
});
_.extend(Navigation.contextTypes, ReactRouter.State.contextTypes);
var State = _.extend({}, ReactRouter.State, {
getInitialState: function () {
this._query = this.context.getCurrentQuery();
this._queryWatches = [];
return null;
},
onQueryChange: function (key, callback) {
this._queryWatches.push({
key: key,
callback: callback
});
},
componentWillReceiveProps: function (nextProps, nextState) {
var q = this.context.getCurrentQuery();
for (var i = 0; i < this._queryWatches.length; i++) {
var watch = this._queryWatches[i];
if (this._query[watch.key] !== q[watch.key]) {
watch.callback(this._query[watch.key], q[watch.key], watch.key);
}
}
this._query = q;
}
});
var Splitter = React.createClass({
getDefaultProps: function () {
return {
axis: "x"
};
},
getInitialState: function () {
return {
applied: false,
startX: false,
startY: false
};
},
onMouseDown: function (e) {
this.setState({
startX: e.pageX,
startY: e.pageY
});
window.addEventListener("mousemove", this.onMouseMove);
window.addEventListener("mouseup", this.onMouseUp);
// Occasionally, only a dragEnd event is triggered, but no mouseUp.
window.addEventListener("dragend", this.onDragEnd);
},
onDragEnd: function () {
this.getDOMNode().style.transform = "";
window.removeEventListener("dragend", this.onDragEnd);
window.removeEventListener("mouseup", this.onMouseUp);
window.removeEventListener("mousemove", this.onMouseMove);
},
onMouseUp: function (e) {
this.onDragEnd();
var node = this.getDOMNode();
var prev = node.previousElementSibling;
var next = node.nextElementSibling;
var dX = e.pageX - this.state.startX;
var dY = e.pageY - this.state.startY;
var flexBasis;
if (this.props.axis === "x") {
flexBasis = prev.offsetWidth + dX;
} else {
flexBasis = prev.offsetHeight + dY;
}
prev.style.flex = "0 0 " + Math.max(0, flexBasis) + "px";
next.style.flex = "1 1 auto";
this.setState({
applied: true
});
this.onResize();
},
onMouseMove: function (e) {
var dX = 0, dY = 0;
if (this.props.axis === "x") {
dX = e.pageX - this.state.startX;
} else {
dY = e.pageY - this.state.startY;
}
this.getDOMNode().style.transform = "translate(" + dX + "px," + dY + "px)";
},
onResize: function () {
// Trigger a global resize event. This notifies components that employ virtual scrolling
// that their viewport may have changed.
window.setTimeout(function () {
window.dispatchEvent(new CustomEvent("resize"));
}, 1);
},
reset: function (willUnmount) {
if (!this.state.applied) {
return;
}
var node = this.getDOMNode();
var prev = node.previousElementSibling;
var next = node.nextElementSibling;
prev.style.flex = "";
next.style.flex = "";
if (!willUnmount) {
this.setState({
applied: false
});
}
this.onResize();
},
componentWillUnmount: function () {
this.reset(true);
},
render: function () {
var className = "splitter";
if (this.props.axis === "x") {
className += " splitter-x";
} else {
className += " splitter-y";
}
return (
<div className={className}>
<div onMouseDown={this.onMouseDown} draggable="true"></div>
</div>
);
}
});
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