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132 lines (107 loc) · 3.21 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 { xor, range } from "lodash";
import { convertToList } from "./pause/pausePoints";
import type { Location, ColumnPosition } from "../types";
import type { Symbols } from "../reducers/ast";
import type {
AstPosition,
AstLocation,
PausePoints,
FunctionDeclaration,
ClassDeclaration
} from "../workers/parser";
export function findBestMatchExpression(
symbols: Symbols,
tokenPos: ColumnPosition
) {
if (symbols.loading) {
return null;
}
const { line, column } = tokenPos;
const { memberExpressions, identifiers, literals } = symbols;
const members = memberExpressions.filter(({ computed }) => !computed);
return []
.concat(identifiers, members, literals)
.reduce((found, expression) => {
const overlaps =
expression.location.start.line == line &&
expression.location.start.column <= column &&
expression.location.end.column >= column;
if (overlaps) {
return expression;
}
return found;
}, null);
}
export function findEmptyLines(sourceText: string, pausePoints: PausePoints) {
if (!pausePoints || !sourceText) {
return [];
}
const pausePointsList = convertToList(pausePoints);
const breakpoints = pausePointsList.filter(point => point.types.break);
const breakpointLines = breakpoints.map(point => point.location.line);
if (!sourceText || breakpointLines.length == 0) {
return [];
}
const lineCount = sourceText.split("\n").length;
const sourceLines = range(1, lineCount + 1);
return xor(sourceLines, breakpointLines);
}
export function containsPosition(a: AstLocation, b: AstPosition) {
const startsBefore =
a.start.line < b.line ||
(a.start.line === b.line && a.start.column <= b.column);
const endsAfter =
a.end.line > b.line || (a.end.line === b.line && a.end.column >= b.column);
return startsBefore && endsAfter;
}
function findClosestofSymbol(declarations: any[], location: Location) {
if (!declarations) {
return null;
}
return declarations.reduce((found, currNode) => {
if (
currNode.name === "anonymous" ||
!containsPosition(currNode.location, {
line: location.line,
column: location.column || 0
})
) {
return found;
}
if (!found) {
return currNode;
}
if (found.location.start.line > currNode.location.start.line) {
return found;
}
if (
found.location.start.line === currNode.location.start.line &&
found.location.start.column > currNode.location.start.column
) {
return found;
}
return currNode;
}, null);
}
export function findClosestFunction(
symbols: ?Symbols,
location: Location
): FunctionDeclaration | null {
if (!symbols || symbols.loading) {
return null;
}
return findClosestofSymbol(symbols.functions, location);
}
export function findClosestClass(
symbols: Symbols,
location: Location
): ClassDeclaration | null {
if (!symbols || symbols.loading) {
return null;
}
return findClosestofSymbol(symbols.classes, location);
}