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symbols-view.js
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symbols-view.js
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/** @babel */
import path from 'path';
import { Point } from 'atom';
import SelectListView from 'atom-select-list';
import fs from 'fs-plus';
import { match } from 'fuzzaldrin';
export default class SymbolsView {
static highlightMatches(context, name, matches, offsetIndex) {
if (!offsetIndex) {
offsetIndex = 0;
}
let lastIndex = 0;
let matchedChars = []; // Build up a set of matched chars to be more semantic
const fragment = document.createDocumentFragment();
for (let matchIndex of Array.from(matches)) {
matchIndex -= offsetIndex;
if (matchIndex < 0) {
continue; // If marking up the basename, omit name matches
}
const unmatched = name.substring(lastIndex, matchIndex);
if (unmatched) {
if (matchedChars.length) {
const span = document.createElement('span');
span.classList.add('character-match');
span.textContent = matchedChars.join('');
fragment.appendChild(span);
}
matchedChars = [];
fragment.appendChild(document.createTextNode(unmatched));
}
matchedChars.push(name[matchIndex]);
lastIndex = matchIndex + 1;
}
if (matchedChars.length) {
const span = document.createElement('span');
span.classList.add('character-match');
span.textContent = matchedChars.join('');
fragment.appendChild(span);
}
// Remaining characters are plain text
fragment.appendChild(document.createTextNode(name.substring(lastIndex)));
return fragment;
}
constructor(stack, emptyMessage = 'No symbols found', maxResults = null) {
this.stack = stack;
this.selectListView = new SelectListView({
maxResults,
emptyMessage,
items: [],
filterKeyForItem: (item) => item.name,
elementForItem: this.elementForItem.bind(this),
didChangeSelection: this.didChangeSelection.bind(this),
didConfirmSelection: this.didConfirmSelection.bind(this),
didConfirmEmptySelection: this.didConfirmEmptySelection.bind(this),
didCancelSelection: this.didCancelSelection.bind(this),
});
this.element = this.selectListView.element;
this.element.classList.add('symbols-view');
this.panel = atom.workspace.addModalPanel({item: this, visible: false});
}
async destroy() {
await this.cancel();
this.panel.destroy();
return this.selectListView.destroy();
}
getFilterKey() {
return 'name';
}
elementForItem({position, name, file, directory}) {
// Style matched characters in search results
const matches = match(name, this.selectListView.getFilterQuery());
if (atom.project.getPaths().length > 1) {
file = path.join(path.basename(directory), file);
}
const li = document.createElement('li');
li.classList.add('two-lines');
const primaryLine = document.createElement('div');
primaryLine.classList.add('primary-line');
if (position) {
primaryLine.textContent = `${name}:${position.row + 1}`;
} else {
primaryLine.appendChild(SymbolsView.highlightMatches(this, name, matches));
}
li.appendChild(primaryLine);
const secondaryLine = document.createElement('div');
secondaryLine.classList.add('secondary-line');
secondaryLine.textContent = file;
li.appendChild(secondaryLine);
return li;
}
async cancel() {
if (!this.isCanceling) {
this.isCanceling = true;
await this.selectListView.update({items: []});
this.panel.hide();
if (this.previouslyFocusedElement) {
this.previouslyFocusedElement.focus();
this.previouslyFocusedElement = null;
}
this.isCanceling = false;
}
}
didCancelSelection() {
this.cancel();
}
didConfirmEmptySelection() {
this.cancel();
}
async didConfirmSelection(tag) {
if (tag.file && !fs.isFileSync(path.join(tag.directory, tag.file))) {
await this.selectListView.update({errorMessage: 'Selected file does not exist'});
setTimeout(() => {
this.selectListView.update({errorMessage: null});
}, 2000);
} else {
await this.cancel();
this.openTag(tag);
}
}
didChangeSelection(tag) {
// no-op
}
openTag(tag) {
const editor = atom.workspace.getActiveTextEditor();
let previous;
if (editor) {
previous = {
editorId: editor.id,
position: editor.getCursorBufferPosition(),
file: editor.getURI(),
};
}
let {position} = tag;
if (!position) { position = this.getTagLine(tag); }
if (tag.file) {
atom.workspace.open(path.join(tag.directory, tag.file)).then(() => {
if (position) {
return this.moveToPosition(position);
}
return undefined;
});
} else if (position && previous && !previous.position.isEqual(position)) {
this.moveToPosition(position);
}
this.stack.push(previous);
}
moveToPosition(position, beginningOfLine) {
const editor = atom.workspace.getActiveTextEditor();
if (beginningOfLine == null) {
beginningOfLine = true;
}
if (editor) {
editor.setCursorBufferPosition(position, {autoscroll: false});
if (beginningOfLine) {
editor.moveToFirstCharacterOfLine();
}
editor.scrollToCursorPosition({center: true});
}
}
attach() {
this.previouslyFocusedElement = document.activeElement;
this.panel.show();
this.selectListView.reset();
this.selectListView.focus();
}
getTagLine(tag) {
if (!tag) {
return undefined;
}
if (tag.lineNumber) {
return new Point(tag.lineNumber - 1, 0);
}
// Remove leading /^ and trailing $/
if (!tag.pattern) {
return undefined;
}
const pattern = tag.pattern.replace(/(^\/\^)|(\$\/$)/g, '').trim();
if (!pattern) {
return undefined;
}
const file = path.join(tag.directory, tag.file);
if (!fs.isFileSync(file)) {
return undefined;
}
const iterable = fs.readFileSync(file, 'utf8').split('\n');
for (let index = 0; index < iterable.length; index++) {
let line = iterable[index];
if (pattern === line.trim()) {
return new Point(index, 0);
}
}
return undefined;
}
}