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Code Issues Releases Wiki Activity

Fix for CodeMirror issues with drop events in Chrome 96 (#6278)

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* fix: handle drag events ourselves in chrome when it adds pseudo file objects to the event

* fix: corrected typo in comment

* fix: coding style

* fix: formatting and remove comments
This commit is contained in:
Saq Imtiaz 2021-11-28 15:46:27 +01:00 committed by GitHub
parent c11493ec37
commit 75aabcce64
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1 changed files with 53 additions and 0 deletions
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53
plugins/tiddlywiki/codemirror/engine.js
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@ -130,6 +130,59 @@ function CodeMirrorEngine(options) {
if(!self.widget.isFileDropEnabled) {
event.stopPropagation(); // Otherwise TW's dropzone widget sees the drop event
}
// Detect if Chrome has added a pseudo File object to the dataTransfer
if(!$tw.utils.dragEventContainsFiles(event) && event.dataTransfer.files.length) {
//Make codemirror ignore the event as we will handle the drop ourselves
event.codemirrorIgnore = true;
event.preventDefault();
// from https://github.com/codemirror/CodeMirror/blob/master/src/measurement/position_measurement.js#L673
function posFromMouse(cm, e, liberal, forRect) {
let display = cm.display
if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") return null
let x, y, space = display.lineSpace.getBoundingClientRect()
// Fails unpredictably on IE[67] when mouse is dragged around quickly.
try { x = e.clientX - space.left; y = e.clientY - space.top }
catch (e) { return null }
let coords = cm.coordsChar(cm, x, y), line
if (forRect && coords.xRel > 0 && (line = cm.getLine(cm.doc, coords.line).text).length == coords.ch) {
let colDiff = window.CodeMirror.countColumn(line, line.length, cm.options.tabSize) - line.length
coords = window.CodeMirror.Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))
}
return coords
}
var pos = posFromMouse(cm,event,true);
if(!pos || cm.isReadOnly()) {
return;
}
// Don't do a replace if the drop happened inside of the selected text.
if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
cm.state.draggingText(event);
// Ensure the editor is re-focused
setTimeout(() => cm.display.input.focus(), 20);
return;
}
try {
var text = event.dataTransfer.getData("Text");
if (text) {
var selected;
if (cm.state.draggingText && !cm.state.draggingText.copy) {
selected = cm.listSelections();
}
cm.setCursor(cm.coordsChar({left:event.pageX,top:event.pageY}));
if (selected) {
for (var i = 0; i < selected.length; ++i) {
replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag");
}
}
cm.replaceSelection(text, "around", "paste");
cm.display.input.focus();
}
}
catch(e){}
}
return false;
});
this.cm.on("keydown",function(cm,event) {