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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/>. */
import { connect } from "devtools/client/shared/vendor/react-redux";
import { Component } from "devtools/client/shared/vendor/react";
import PropTypes from "devtools/client/shared/vendor/react-prop-types";
import {
getSelectedSource,
getSelectedBreakableLines,
} from "../../selectors/index";
import { fromEditorLine } from "../../utils/editor/index";
import { isWasm } from "../../utils/wasm";
class EmptyLines extends Component {
static get propTypes() {
return {
breakableLines: PropTypes.object.isRequired,
editor: PropTypes.object.isRequired,
selectedSource: PropTypes.object.isRequired,
};
}
componentDidMount() {
this.disableEmptyLines();
}
componentDidUpdate() {
this.disableEmptyLines();
}
componentWillUnmount() {
const { editor } = this.props;
editor.codeMirror.operation(() => {
editor.codeMirror.eachLine(lineHandle => {
editor.codeMirror.removeLineClass(lineHandle, "wrap", "empty-line");
});
});
}
shouldComponentUpdate(nextProps) {
const { breakableLines, selectedSource } = this.props;
return (
// Breakable lines are something that evolves over time,
// but we either have them loaded or not. So only compare the size
// as sometimes we always get a blank new empty Set instance.
breakableLines.size != nextProps.breakableLines.size ||
selectedSource.id != nextProps.selectedSource.id
);
}
disableEmptyLines() {
const { breakableLines, selectedSource, editor } = this.props;
const { codeMirror } = editor;
const isSourceWasm = isWasm(selectedSource.id);
codeMirror.operation(() => {
const lineCount = codeMirror.lineCount();
for (let i = 0; i < lineCount; i++) {
const line = fromEditorLine(selectedSource.id, i, isSourceWasm);
if (breakableLines.has(line)) {
codeMirror.removeLineClass(i, "wrap", "empty-line");
} else {
codeMirror.addLineClass(i, "wrap", "empty-line");
}
}
});
}
render() {
return null;
}
}
const mapStateToProps = state => {
const selectedSource = getSelectedSource(state);
if (!selectedSource) {
throw new Error("no selectedSource");
}
const breakableLines = getSelectedBreakableLines(state);
return {
selectedSource,
breakableLines,
};
};
export default connect(mapStateToProps)(EmptyLines);
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