/* 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 . */
// @flow
import { without, range } from "lodash";
import type { Location, Source, ColumnPosition } from "../types";
import type { AstPosition, AstLocation, PausePoint } from "../workers/parser";
import type {
SymbolDeclarations,
FunctionDeclaration
} from "../workers/parser/getSymbols";
export function findBestMatchExpression(
symbols: SymbolDeclarations,
tokenPos: ColumnPosition
) {
const { memberExpressions, identifiers, literals } = symbols;
const { line, column } = tokenPos;
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(
selectedSource: Source,
pausePoints: PausePoint[]
) {
if (!pausePoints || pausePoints.length == 0 || !selectedSource) {
return [];
}
const breakpoints = pausePoints.filter(point => point.types.breakpoint);
const breakpointLines = breakpoints.map(point => point.location.line);
if (!selectedSource.text) {
return [];
}
const lineCount = selectedSource.text.split("\n").length;
const sourceLines = range(1, lineCount + 1);
return without(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;
}
export function findClosestFunction(
functions: FunctionDeclaration[],
location: Location
) {
return functions.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);
}