selection-pointer.js
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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/5/LICENSE
(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror"));
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";
CodeMirror.defineOption("selectionPointer", false, function(cm, val) {
var data = cm.state.selectionPointer;
if (data) {
CodeMirror.off(cm.getWrapperElement(), "mousemove", data.mousemove);
CodeMirror.off(cm.getWrapperElement(), "mouseout", data.mouseout);
CodeMirror.off(window, "scroll", data.windowScroll);
cm.off("cursorActivity", reset);
cm.off("scroll", reset);
cm.state.selectionPointer = null;
cm.display.lineDiv.style.cursor = "";
}
if (val) {
data = cm.state.selectionPointer = {
value: typeof val == "string" ? val : "default",
mousemove: function(event) { mousemove(cm, event); },
mouseout: function(event) { mouseout(cm, event); },
windowScroll: function() { reset(cm); },
rects: null,
mouseX: null, mouseY: null,
willUpdate: false
};
CodeMirror.on(cm.getWrapperElement(), "mousemove", data.mousemove);
CodeMirror.on(cm.getWrapperElement(), "mouseout", data.mouseout);
CodeMirror.on(window, "scroll", data.windowScroll);
cm.on("cursorActivity", reset);
cm.on("scroll", reset);
}
});
function mousemove(cm, event) {
var data = cm.state.selectionPointer;
if (event.buttons == null ? event.which : event.buttons) {
data.mouseX = data.mouseY = null;
} else {
data.mouseX = event.clientX;
data.mouseY = event.clientY;
}
scheduleUpdate(cm);
}
function mouseout(cm, event) {
if (!cm.getWrapperElement().contains(event.relatedTarget)) {
var data = cm.state.selectionPointer;
data.mouseX = data.mouseY = null;
scheduleUpdate(cm);
}
}
function reset(cm) {
cm.state.selectionPointer.rects = null;
scheduleUpdate(cm);
}
function scheduleUpdate(cm) {
if (!cm.state.selectionPointer.willUpdate) {
cm.state.selectionPointer.willUpdate = true;
setTimeout(function() {
update(cm);
cm.state.selectionPointer.willUpdate = false;
}, 50);
}
}
function update(cm) {
var data = cm.state.selectionPointer;
if (!data) return;
if (data.rects == null && data.mouseX != null) {
data.rects = [];
if (cm.somethingSelected()) {
for (var sel = cm.display.selectionDiv.firstChild; sel; sel = sel.nextSibling)
data.rects.push(sel.getBoundingClientRect());
}
}
var inside = false;
if (data.mouseX != null) for (var i = 0; i < data.rects.length; i++) {
var rect = data.rects[i];
if (rect.left <= data.mouseX && rect.right >= data.mouseX &&
rect.top <= data.mouseY && rect.bottom >= data.mouseY)
inside = true;
}
var cursor = inside ? data.value : "";
if (cm.display.lineDiv.style.cursor != cursor)
cm.display.lineDiv.style.cursor = cursor;
}
});