mirror of
https://github.com/go-gitea/gitea.git
synced 2025-12-09 15:43:46 +01:00
240 lines
8.8 KiB
TypeScript
240 lines
8.8 KiB
TypeScript
import {addDelegatedEventListener} from '../utils/dom.ts';
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import {sleep} from '../utils.ts';
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import {setFileFolding} from './file-fold.ts';
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const diffLineNumberCellSelector = '#diff-file-boxes .code-diff td.lines-num[data-line-num]';
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const diffAnchorSuffixRegex = /([LR])(\d+)$/;
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const diffHashRangeRegex = /^(diff-[0-9a-f]+)([LR]\d+)(?:-([LR]\d+))?$/i;
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type DiffAnchorSide = 'L' | 'R';
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type DiffAnchorInfo = {anchor: string, fragment: string, side: DiffAnchorSide, line: number};
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type DiffSelectionState = DiffAnchorInfo & {container: HTMLElement};
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type DiffSelectionRange = {fragment: string, startSide: DiffAnchorSide, startLine: number, endSide: DiffAnchorSide, endLine: number};
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let diffSelectionStart: DiffSelectionState | null = null;
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function changeHash(hash: string) {
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if (window.history.pushState) {
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window.history.pushState(null, null, hash);
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} else {
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window.location.hash = hash;
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}
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}
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function parseDiffAnchor(anchor: string | null): DiffAnchorInfo | null {
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if (!anchor || !anchor.startsWith('diff-')) return null;
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const suffixMatch = diffAnchorSuffixRegex.exec(anchor);
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if (!suffixMatch) return null;
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const line = Number.parseInt(suffixMatch[2]);
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if (Number.isNaN(line)) return null;
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const fragment = anchor.slice(0, -suffixMatch[0].length);
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const side = suffixMatch[1] as DiffAnchorSide;
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return {anchor, fragment, side, line};
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}
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function applyDiffLineSelection(container: HTMLElement, range: DiffSelectionRange, options?: {updateHash?: boolean}): boolean {
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// Find the start and end anchor elements
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const startId = `${range.fragment}${range.startSide}${range.startLine}`;
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const endId = `${range.fragment}${range.endSide}${range.endLine}`;
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const startSpan = container.querySelector<HTMLElement>(`#${CSS.escape(startId)}`);
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const endSpan = container.querySelector<HTMLElement>(`#${CSS.escape(endId)}`);
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if (!startSpan || !endSpan) return false;
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const startTr = startSpan.closest('tr');
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const endTr = endSpan.closest('tr');
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if (!startTr || !endTr) return false;
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// Clear previous selection
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for (const tr of document.querySelectorAll('.code-diff tr.active')) {
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tr.classList.remove('active');
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}
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// Get all rows in the diff section
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const allRows = Array.from(container.querySelectorAll<HTMLElement>('.code-diff tbody tr'));
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const startIndex = allRows.indexOf(startTr);
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const endIndex = allRows.indexOf(endTr);
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if (startIndex === -1 || endIndex === -1) return false;
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// Select all rows between start and end (inclusive)
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const minIndex = Math.min(startIndex, endIndex);
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const maxIndex = Math.max(startIndex, endIndex);
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for (let i = minIndex; i <= maxIndex; i++) {
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const row = allRows[i];
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// Only select rows that are actual diff lines (not comment rows, expansion buttons, etc.)
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// Skip rows with data-line-type="4" which are code expansion buttons
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if (row.querySelector('td.lines-num') && row.getAttribute('data-line-type') !== '4') {
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row.classList.add('active');
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}
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}
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if (options?.updateHash !== false) {
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const startAnchor = `${range.fragment}${range.startSide}${range.startLine}`;
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const hashValue = (range.startSide === range.endSide && range.startLine === range.endLine) ?
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startAnchor :
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`${startAnchor}-${range.endSide}${range.endLine}`;
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changeHash(`#${hashValue}`);
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}
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return true;
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}
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export function parseDiffHashRange(hashValue: string): DiffSelectionRange | null {
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if (!hashValue.startsWith('diff-')) return null;
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const match = diffHashRangeRegex.exec(hashValue);
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if (!match) return null;
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const startInfo = parseDiffAnchor(`${match[1]}${match[2]}`);
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if (!startInfo) return null;
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let endSide = startInfo.side;
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let endLine = startInfo.line;
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if (match[3]) {
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const endInfo = parseDiffAnchor(`${match[1]}${match[3]}`);
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if (!endInfo) {
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return {fragment: startInfo.fragment, startSide: startInfo.side, startLine: startInfo.line, endSide: startInfo.side, endLine: startInfo.line};
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}
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endSide = endInfo.side;
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endLine = endInfo.line;
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}
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return {
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fragment: startInfo.fragment,
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startSide: startInfo.side,
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startLine: startInfo.line,
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endSide,
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endLine,
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};
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}
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export async function highlightDiffSelectionFromHash(): Promise<boolean> {
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const {hash} = window.location;
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if (!hash || !hash.startsWith('#diff-')) return false;
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const range = parseDiffHashRange(hash.substring(1));
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if (!range) return false;
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const targetId = `${range.fragment}${range.startSide}${range.startLine}`;
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// Wait for the target element to be available (in case it needs to be loaded)
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const targetSpan = document.querySelector<HTMLElement>(`#${CSS.escape(targetId)}`);
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if (!targetSpan) {
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// Target not found - it might need to be loaded via "show more files"
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// Return false to let onLocationHashChange handle the loading
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return false;
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}
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const container = targetSpan.closest<HTMLElement>('.diff-file-box');
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if (!container) return false;
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// Check if the file is collapsed and expand it if needed
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if (container.getAttribute('data-folded') === 'true') {
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const foldBtn = container.querySelector<HTMLElement>('.fold-file');
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if (foldBtn) {
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// Expand the file using the setFileFolding utility
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setFileFolding(container, foldBtn, false);
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// Wait a bit for the expansion animation
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await sleep(100);
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}
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}
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if (!applyDiffLineSelection(container, range, {updateHash: false})) return false;
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diffSelectionStart = {
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anchor: targetId,
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fragment: range.fragment,
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side: range.startSide,
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line: range.startLine,
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container,
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};
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// Scroll to the first selected line (scroll to the tr element, not the span)
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// The span is an inline element inside td, we need to scroll to the tr for better visibility
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await sleep(10);
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const targetTr = targetSpan.closest('tr');
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if (targetTr) {
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targetTr.scrollIntoView({behavior: 'smooth', block: 'center'});
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}
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return true;
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}
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function handleDiffLineNumberClick(cell: HTMLElement, e: MouseEvent) {
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let span = cell.querySelector<HTMLSpanElement>('span[id^="diff-"]');
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let info = parseDiffAnchor(span?.id ?? null);
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// If clicked cell has no line number (e.g., clicking on the empty side of a deletion/addition),
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// try to find the line number from the sibling cell on the same row
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if (!info) {
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const row = cell.closest('tr');
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if (!row) return;
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// Find the other line number cell in the same row
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const siblingCell = cell.classList.contains('lines-num-old') ?
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row.querySelector<HTMLElement>('td.lines-num-new') :
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row.querySelector<HTMLElement>('td.lines-num-old');
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if (siblingCell) {
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span = siblingCell.querySelector<HTMLSpanElement>('span[id^="diff-"]');
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info = parseDiffAnchor(span?.id ?? null);
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}
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if (!info) return;
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}
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const container = cell.closest<HTMLElement>('.diff-file-box');
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if (!container) return;
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e.preventDefault();
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// Check if clicking on a single already-selected line without shift key - deselect it
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if (!e.shiftKey) {
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const clickedRow = cell.closest('tr');
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if (clickedRow?.classList.contains('active')) {
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// Check if this is a single-line selection by checking if it's the only selected line
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const selectedRows = container.querySelectorAll('.code-diff tr.active');
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if (selectedRows.length === 1) {
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// This is a single selected line, deselect it
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clickedRow.classList.remove('active');
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diffSelectionStart = null;
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// Remove hash from URL completely
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if (window.history.pushState) {
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window.history.pushState(null, null, window.location.pathname + window.location.search);
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} else {
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window.location.hash = '';
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}
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window.getSelection().removeAllRanges();
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return;
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}
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}
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}
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let rangeStart: DiffAnchorInfo = info;
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if (e.shiftKey && diffSelectionStart &&
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diffSelectionStart.container === container &&
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diffSelectionStart.fragment === info.fragment) {
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rangeStart = diffSelectionStart;
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}
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const range: DiffSelectionRange = {
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fragment: info.fragment,
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startSide: rangeStart.side,
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startLine: rangeStart.line,
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endSide: info.side,
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endLine: info.line,
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};
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if (applyDiffLineSelection(container, range)) {
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diffSelectionStart = {...info, container};
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window.getSelection().removeAllRanges();
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}
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}
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export function initDiffLineSelection() {
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addDelegatedEventListener<HTMLElement, MouseEvent>(document, 'click', diffLineNumberCellSelector, (cell, e) => {
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if (e.defaultPrevented) return;
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// Ignore clicks on or inside code-expander-buttons
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const target = e.target as HTMLElement;
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if (target.closest('.code-expander-button') || target.closest('.code-expander-buttons') ||
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target.closest('button, a, input, select, textarea, summary, [role="button"]')) {
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return;
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}
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handleDiffLineNumberClick(cell, e);
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});
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window.addEventListener('hashchange', () => {
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highlightDiffSelectionFromHash();
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});
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highlightDiffSelectionFromHash();
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}
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