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DebugLine.js
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132 lines (109 loc) · 3.42 KB
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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/>. */
// @flow
import { PureComponent } from "react";
import {
toEditorPosition,
getDocument,
hasDocument,
startOperation,
endOperation,
getTokenEnd
} from "../../utils/editor";
import { isException } from "../../utils/pause";
import { getIndentation } from "../../utils/indentation";
import { connect } from "../../utils/connect";
import {
getVisibleSelectedFrame,
getPauseReason,
getSourceWithContent,
getCurrentThread
} from "../../selectors";
import type { Frame, Why, SourceWithContent } from "../../types";
type Props = {
frame: Frame,
why: Why,
source: ?SourceWithContent
};
type TextClasses = {
markTextClass: string,
lineClass: string
};
function isDocumentReady(source: ?SourceWithContent, frame) {
return (
frame && source && source.content && hasDocument(frame.location.sourceId)
);
}
export class DebugLine extends PureComponent<Props> {
debugExpression: null;
componentDidMount() {
const { why, frame, source } = this.props;
this.setDebugLine(why, frame, source);
}
componentWillUnmount() {
const { why, frame, source } = this.props;
this.clearDebugLine(why, frame, source);
}
componentDidUpdate(prevProps: Props) {
const { why, frame, source } = this.props;
startOperation();
this.clearDebugLine(prevProps.why, prevProps.frame, prevProps.source);
this.setDebugLine(why, frame, source);
endOperation();
}
setDebugLine(why: Why, frame: Frame, source: ?SourceWithContent) {
if (!isDocumentReady(source, frame)) {
return;
}
const sourceId = frame.location.sourceId;
const doc = getDocument(sourceId);
let { line, column } = toEditorPosition(frame.location);
const { markTextClass, lineClass } = this.getTextClasses(why);
doc.addLineClass(line, "line", lineClass);
const lineText = doc.getLine(line);
column = Math.max(column, getIndentation(lineText));
// If component updates because user clicks on
// another source tab, codeMirror will be null.
const columnEnd = doc.cm ? getTokenEnd(doc.cm, line, column) : null;
this.debugExpression = doc.markText(
{ ch: column, line },
{ ch: columnEnd, line },
{ className: markTextClass }
);
}
clearDebugLine(why: Why, frame: Frame, source: ?SourceWithContent) {
if (!isDocumentReady(source, frame)) {
return;
}
if (this.debugExpression) {
this.debugExpression.clear();
}
const sourceId = frame.location.sourceId;
const { line } = toEditorPosition(frame.location);
const doc = getDocument(sourceId);
const { lineClass } = this.getTextClasses(why);
doc.removeLineClass(line, "line", lineClass);
}
getTextClasses(why: Why): TextClasses {
if (isException(why)) {
return {
markTextClass: "debug-expression-error",
lineClass: "new-debug-line-error"
};
}
return { markTextClass: "debug-expression", lineClass: "new-debug-line" };
}
render() {
return null;
}
}
const mapStateToProps = state => {
const frame = getVisibleSelectedFrame(state);
return {
frame,
source: frame && getSourceWithContent(state, frame.location.sourceId),
why: getPauseReason(state, getCurrentThread(state))
};
};
export default connect(mapStateToProps)(DebugLine);