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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 { findBestMatchExpression } from "../utils/ast";
import { getTokenLocation } from "../utils/editor";
import { isReactComponent, isImmutable } from "../utils/preview";
import { isGeneratedId } from "devtools-source-map";
import { PROMISE } from "./utils/middleware/promise";
import {
getPreview,
getInScopeLines,
getSelectedSource,
getSelectedFrame,
getSymbols
} from "../selectors";
import { getMappedExpression } from "./expressions";
import { isEqual } from "lodash";
import type { ThunkArgs } from "./types";
import type { AstLocation } from "../workers/parser";
async function getReactProps(evaluate) {
const reactDisplayName = await evaluate(
"this._reactInternalInstance.getName()"
);
return {
displayName: reactDisplayName.result
};
}
async function getImmutableProps(expression: string, evaluate) {
const immutableEntries = await evaluate((exp => `${exp}.toJS()`)(expression));
const immutableType = await evaluate(
(exp => `${exp}.constructor.name`)(expression)
);
return {
type: immutableType.result,
entries: immutableEntries.result
};
}
async function getExtraProps(expression, result, evaluate) {
const props = {};
if (isReactComponent(result)) {
props.react = await getReactProps(evaluate);
}
if (isImmutable(result)) {
props.immutable = await getImmutableProps(expression, evaluate);
}
return props;
}
export function updatePreview(target: HTMLElement, editor: any) {
return ({ dispatch, getState, client, sourceMaps }: ThunkArgs) => {
const location = getTokenLocation(editor.codeMirror, target);
const tokenText = target.innerText ? target.innerText.trim() : "";
const cursorPos = target.getBoundingClientRect();
const preview = getPreview(getState());
if (preview) {
// We are mousing over the same token as before
if (isEqual(preview.tokenPos, location)) {
return;
}
// We are mousing over a new token that is not in the preview
if (!target.classList.contains("debug-expression")) {
dispatch(clearPreview());
}
}
const source = getSelectedSource(getState());
const symbols = getSymbols(getState(), source.toJS());
if (symbols.functions.length == 0) {
return;
}
const invalidToken =
tokenText === "" || tokenText.match(/[(){}\|&%,.;=<>\+-/\*\s]/);
const invalidTarget =
(target.parentElement &&
!target.parentElement.closest(".CodeMirror-line")) ||
cursorPos.top == 0;
const isUpdating = preview && preview.updating;
const linesInScope = getInScopeLines(getState());
const inScope = linesInScope && linesInScope.includes(location.line);
const invaildType =
target.className === "cm-string" ||
target.className === "cm-number" ||
target.className === "cm-atom";
if (
invalidTarget ||
!inScope ||
isUpdating ||
invalidToken ||
invaildType
) {
return;
}
dispatch(setPreview(tokenText, location, cursorPos));
};
}
export function setPreview(
token: string,
tokenPos: AstLocation,
cursorPos: any
) {
return async ({ dispatch, getState, client, sourceMaps }: ThunkArgs) => {
const currentSelection = getPreview(getState());
if (currentSelection && currentSelection.updating) {
return;
}
await dispatch({
type: "SET_PREVIEW",
[PROMISE]: (async function() {
const source = getSelectedSource(getState());
const symbols = getSymbols(getState(), source.toJS());
const found = findBestMatchExpression(symbols, tokenPos, token);
if (!found) {
return;
}
let { expression, location } = found;
if (!expression) {
return;
}
const sourceId = source.get("id");
if (location && !isGeneratedId(sourceId)) {
const generatedLocation = await sourceMaps.getGeneratedLocation(
{ ...location.start, sourceId },
source.toJS()
);
expression = await getMappedExpression(
{ sourceMaps },
generatedLocation,
expression
);
}
const selectedFrame = getSelectedFrame(getState());
const { result } = await client.evaluateInFrame(
selectedFrame.id,
expression
);
if (result === undefined) {
return;
}
const extra = await getExtraProps(expression, result, expr =>
client.evaluateInFrame(selectedFrame.id, expr)
);
return {
expression,
result,
location,
tokenPos,
cursorPos,
extra
};
})()
});
};
}
export function clearPreview() {
return ({ dispatch, getState, client }: ThunkArgs) => {
const currentSelection = getPreview(getState());
if (!currentSelection) {
return;
}
return dispatch({
type: "CLEAR_SELECTION"
});
};
}