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Merge pull request #17954 from uniqueiniquity/regions

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Add support for custom outlining regions
This commit is contained in:
Benjamin Lichtman
2017-09-15 17:04:32 -07:00
committed by GitHub
parent 088da79079 e5c43cddb7
commit 83f2401523
4 changed files with 110 additions and 1 deletions
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39
src/services/outliningElementsCollector.ts
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@@ -2,13 +2,17 @@
namespace ts.OutliningElementsCollector {
const collapseText = "...";
const maxDepth = 20;
const defaultLabel = "#region";
const regionMatch = new RegExp("^\\s*//\\s*#(end)?region(?:\\s+(.*))?$");
export function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[] {
const elements: OutliningSpan[] = [];
let depth = 0;
const regions: OutliningSpan[] = [];
walk(sourceFile);
return elements;
gatherRegions();
return elements.sort((span1, span2) => span1.textSpan.start - span2.textSpan.start);
/** If useFullStart is true, then the collapsing span includes leading whitespace, including linebreaks. */
function addOutliningSpan(hintSpanNode: Node, startElement: Node, endElement: Node, autoCollapse: boolean, useFullStart: boolean) {
@@ -89,6 +93,39 @@ namespace ts.OutliningElementsCollector {
return isFunctionBlock(node) && node.parent.kind !== SyntaxKind.ArrowFunction;
}
function gatherRegions(): void {
const lineStarts = sourceFile.getLineStarts();
for (let i = 0; i < lineStarts.length; i++) {
const currentLineStart = lineStarts[i];
const lineEnd = lineStarts[i + 1] - 1 || sourceFile.getEnd();
const comment = sourceFile.text.substring(currentLineStart, lineEnd);
const result = comment.match(regionMatch);
if (result && !isInComment(sourceFile, currentLineStart)) {
if (!result[1]) {
const start = sourceFile.getFullText().indexOf("//", currentLineStart);
const textSpan = createTextSpanFromBounds(start, lineEnd);
const region: OutliningSpan = {
textSpan,
hintSpan: textSpan,
bannerText: result[2] || defaultLabel,
autoCollapse: false
};
regions.push(region);
}
else {
const region = regions.pop();
if (region) {
region.textSpan.length = lineEnd - region.textSpan.start;
region.hintSpan.length = lineEnd - region.textSpan.start;
elements.push(region);
}
}
}
}
}
function walk(n: Node): void {
cancellationToken.throwIfCancellationRequested();
if (depth > maxDepth) {