Mercurial
diff .cms/lib/codemirror/src/model/selection_updates.js @ 0:78edf6b517a0 draft
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author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/src/model/selection_updates.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,216 @@ +import { signalLater } from "../util/operation_group.js" +import { ensureCursorVisible } from "../display/scrolling.js" +import { clipPos, cmp, Pos } from "../line/pos.js" +import { getLine } from "../line/utils_line.js" +import { hasHandler, signal, signalCursorActivity } from "../util/event.js" +import { lst, sel_dontScroll } from "../util/misc.js" + +import { addSelectionToHistory } from "./history.js" +import { normalizeSelection, Range, Selection, simpleSelection } from "./selection.js" + +// The 'scroll' parameter given to many of these indicated whether +// the new cursor position should be scrolled into view after +// modifying the selection. + +// If shift is held or the extend flag is set, extends a range to +// include a given position (and optionally a second position). +// Otherwise, simply returns the range between the given positions. +// Used for cursor motion and such. +export function extendRange(range, head, other, extend) { + if (extend) { + let anchor = range.anchor + if (other) { + let posBefore = cmp(head, anchor) < 0 + if (posBefore != (cmp(other, anchor) < 0)) { + anchor = head + head = other + } else if (posBefore != (cmp(head, other) < 0)) { + head = other + } + } + return new Range(anchor, head) + } else { + return new Range(other || head, head) + } +} + +// Extend the primary selection range, discard the rest. +export function extendSelection(doc, head, other, options, extend) { + if (extend == null) extend = doc.cm && (doc.cm.display.shift || doc.extend) + setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options) +} + +// Extend all selections (pos is an array of selections with length +// equal the number of selections) +export function extendSelections(doc, heads, options) { + let out = [] + let extend = doc.cm && (doc.cm.display.shift || doc.extend) + for (let i = 0; i < doc.sel.ranges.length; i++) + out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend) + let newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex) + setSelection(doc, newSel, options) +} + +// Updates a single range in the selection. +export function replaceOneSelection(doc, i, range, options) { + let ranges = doc.sel.ranges.slice(0) + ranges[i] = range + setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options) +} + +// Reset the selection to a single range. +export function setSimpleSelection(doc, anchor, head, options) { + setSelection(doc, simpleSelection(anchor, head), options) +} + +// Give beforeSelectionChange handlers a change to influence a +// selection update. +function filterSelectionChange(doc, sel, options) { + let obj = { + ranges: sel.ranges, + update: function(ranges) { + this.ranges = [] + for (let i = 0; i < ranges.length; i++) + this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor), + clipPos(doc, ranges[i].head)) + }, + origin: options && options.origin + } + signal(doc, "beforeSelectionChange", doc, obj) + if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj) + if (obj.ranges != sel.ranges) return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) + else return sel +} + +export function setSelectionReplaceHistory(doc, sel, options) { + let done = doc.history.done, last = lst(done) + if (last && last.ranges) { + done[done.length - 1] = sel + setSelectionNoUndo(doc, sel, options) + } else { + setSelection(doc, sel, options) + } +} + +// Set a new selection. +export function setSelection(doc, sel, options) { + setSelectionNoUndo(doc, sel, options) + addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options) +} + +export function setSelectionNoUndo(doc, sel, options) { + if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) + sel = filterSelectionChange(doc, sel, options) + + let bias = options && options.bias || + (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1) + setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true)) + + if (!(options && options.scroll === false) && doc.cm && doc.cm.getOption("readOnly") != "nocursor") + ensureCursorVisible(doc.cm) +} + +function setSelectionInner(doc, sel) { + if (sel.equals(doc.sel)) return + + doc.sel = sel + + if (doc.cm) { + doc.cm.curOp.updateInput = 1 + doc.cm.curOp.selectionChanged = true + signalCursorActivity(doc.cm) + } + signalLater(doc, "cursorActivity", doc) +} + +// Verify that the selection does not partially select any atomic +// marked ranges. +export function reCheckSelection(doc) { + setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false)) +} + +// Return a selection that does not partially select any atomic +// ranges. +function skipAtomicInSelection(doc, sel, bias, mayClear) { + let out + for (let i = 0; i < sel.ranges.length; i++) { + let range = sel.ranges[i] + let old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i] + let newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear) + let newHead = range.head == range.anchor ? newAnchor : skipAtomic(doc, range.head, old && old.head, bias, mayClear) + if (out || newAnchor != range.anchor || newHead != range.head) { + if (!out) out = sel.ranges.slice(0, i) + out[i] = new Range(newAnchor, newHead) + } + } + return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel +} + +function skipAtomicInner(doc, pos, oldPos, dir, mayClear) { + let line = getLine(doc, pos.line) + if (line.markedSpans) for (let i = 0; i < line.markedSpans.length; ++i) { + let sp = line.markedSpans[i], m = sp.marker + + // Determine if we should prevent the cursor being placed to the left/right of an atomic marker + // Historically this was determined using the inclusiveLeft/Right option, but the new way to control it + // is with selectLeft/Right + let preventCursorLeft = ("selectLeft" in m) ? !m.selectLeft : m.inclusiveLeft + let preventCursorRight = ("selectRight" in m) ? !m.selectRight : m.inclusiveRight + + if ((sp.from == null || (preventCursorLeft ? sp.from <= pos.ch : sp.from < pos.ch)) && + (sp.to == null || (preventCursorRight ? sp.to >= pos.ch : sp.to > pos.ch))) { + if (mayClear) { + signal(m, "beforeCursorEnter") + if (m.explicitlyCleared) { + if (!line.markedSpans) break + else {--i; continue} + } + } + if (!m.atomic) continue + + if (oldPos) { + let near = m.find(dir < 0 ? 1 : -1), diff + if (dir < 0 ? preventCursorRight : preventCursorLeft) + near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) + if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0)) + return skipAtomicInner(doc, near, pos, dir, mayClear) + } + + let far = m.find(dir < 0 ? -1 : 1) + if (dir < 0 ? preventCursorLeft : preventCursorRight) + far = movePos(doc, far, dir, far.line == pos.line ? line : null) + return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null + } + } + return pos +} + +// Ensure a given position is not inside an atomic range. +export function skipAtomic(doc, pos, oldPos, bias, mayClear) { + let dir = bias || 1 + let found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) || + (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) || + skipAtomicInner(doc, pos, oldPos, -dir, mayClear) || + (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true)) + if (!found) { + doc.cantEdit = true + return Pos(doc.first, 0) + } + return found +} + +function movePos(doc, pos, dir, line) { + if (dir < 0 && pos.ch == 0) { + if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1)) + else return null + } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) { + if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0) + else return null + } else { + return new Pos(pos.line, pos.ch + dir) + } +} + +export function selectAll(cm) { + cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll) +}