import { signalLater } from "../util/operation_group.js"
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import { ensureCursorVisible } from "../display/scrolling.js"
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import { clipPos, cmp, Pos } from "../line/pos.js"
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import { getLine } from "../line/utils_line.js"
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import { hasHandler, signal, signalCursorActivity } from "../util/event.js"
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import { lst, sel_dontScroll } from "../util/misc.js"
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import { addSelectionToHistory } from "./history.js"
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import { normalizeSelection, Range, Selection, simpleSelection } from "./selection.js"
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// The 'scroll' parameter given to many of these indicated whether
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// the new cursor position should be scrolled into view after
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// modifying the selection.
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// If shift is held or the extend flag is set, extends a range to
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// include a given position (and optionally a second position).
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// Otherwise, simply returns the range between the given positions.
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// Used for cursor motion and such.
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export function extendRange(range, head, other, extend) {
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if (extend) {
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let anchor = range.anchor
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if (other) {
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let posBefore = cmp(head, anchor) < 0
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if (posBefore != (cmp(other, anchor) < 0)) {
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anchor = head
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head = other
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} else if (posBefore != (cmp(head, other) < 0)) {
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head = other
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}
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}
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return new Range(anchor, head)
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} else {
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return new Range(other || head, head)
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}
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}
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// Extend the primary selection range, discard the rest.
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export function extendSelection(doc, head, other, options, extend) {
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if (extend == null) extend = doc.cm && (doc.cm.display.shift || doc.extend)
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setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options)
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}
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// Extend all selections (pos is an array of selections with length
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// equal the number of selections)
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export function extendSelections(doc, heads, options) {
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let out = []
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let extend = doc.cm && (doc.cm.display.shift || doc.extend)
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for (let i = 0; i < doc.sel.ranges.length; i++)
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out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend)
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let newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex)
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setSelection(doc, newSel, options)
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}
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// Updates a single range in the selection.
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export function replaceOneSelection(doc, i, range, options) {
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let ranges = doc.sel.ranges.slice(0)
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ranges[i] = range
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setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options)
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}
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// Reset the selection to a single range.
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export function setSimpleSelection(doc, anchor, head, options) {
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setSelection(doc, simpleSelection(anchor, head), options)
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}
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// Give beforeSelectionChange handlers a change to influence a
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// selection update.
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function filterSelectionChange(doc, sel, options) {
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let obj = {
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ranges: sel.ranges,
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update: function(ranges) {
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this.ranges = []
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for (let i = 0; i < ranges.length; i++)
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this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
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clipPos(doc, ranges[i].head))
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},
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origin: options && options.origin
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}
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signal(doc, "beforeSelectionChange", doc, obj)
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if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj)
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if (obj.ranges != sel.ranges) return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1)
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else return sel
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}
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export function setSelectionReplaceHistory(doc, sel, options) {
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let done = doc.history.done, last = lst(done)
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if (last && last.ranges) {
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done[done.length - 1] = sel
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setSelectionNoUndo(doc, sel, options)
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} else {
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setSelection(doc, sel, options)
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}
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}
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// Set a new selection.
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export function setSelection(doc, sel, options) {
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setSelectionNoUndo(doc, sel, options)
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addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
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}
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export function setSelectionNoUndo(doc, sel, options) {
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if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
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sel = filterSelectionChange(doc, sel, options)
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let bias = options && options.bias ||
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(cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
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setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))
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if (!(options && options.scroll === false) && doc.cm)
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ensureCursorVisible(doc.cm)
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}
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function setSelectionInner(doc, sel) {
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if (sel.equals(doc.sel)) return
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doc.sel = sel
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if (doc.cm) {
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doc.cm.curOp.updateInput = 1
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doc.cm.curOp.selectionChanged = true
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signalCursorActivity(doc.cm)
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}
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signalLater(doc, "cursorActivity", doc)
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}
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// Verify that the selection does not partially select any atomic
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// marked ranges.
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export function reCheckSelection(doc) {
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setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false))
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}
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// Return a selection that does not partially select any atomic
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// ranges.
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function skipAtomicInSelection(doc, sel, bias, mayClear) {
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let out
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for (let i = 0; i < sel.ranges.length; i++) {
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let range = sel.ranges[i]
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let old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
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let newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
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let newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
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if (out || newAnchor != range.anchor || newHead != range.head) {
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if (!out) out = sel.ranges.slice(0, i)
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out[i] = new Range(newAnchor, newHead)
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}
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}
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return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
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}
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function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
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let line = getLine(doc, pos.line)
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if (line.markedSpans) for (let i = 0; i < line.markedSpans.length; ++i) {
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let sp = line.markedSpans[i], m = sp.marker
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if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
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(sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
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if (mayClear) {
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signal(m, "beforeCursorEnter")
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if (m.explicitlyCleared) {
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if (!line.markedSpans) break
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else {--i; continue}
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}
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}
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if (!m.atomic) continue
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if (oldPos) {
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let near = m.find(dir < 0 ? 1 : -1), diff
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if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
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near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null)
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if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
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return skipAtomicInner(doc, near, pos, dir, mayClear)
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}
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let far = m.find(dir < 0 ? -1 : 1)
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if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
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far = movePos(doc, far, dir, far.line == pos.line ? line : null)
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return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
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}
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}
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return pos
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}
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// Ensure a given position is not inside an atomic range.
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export function skipAtomic(doc, pos, oldPos, bias, mayClear) {
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let dir = bias || 1
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let found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
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(!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
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skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
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(!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
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if (!found) {
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doc.cantEdit = true
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return Pos(doc.first, 0)
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}
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return found
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}
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function movePos(doc, pos, dir, line) {
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if (dir < 0 && pos.ch == 0) {
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if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1))
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else return null
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} else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
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if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0)
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else return null
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} else {
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return new Pos(pos.line, pos.ch + dir)
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}
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}
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export function selectAll(cm) {
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cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)
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}
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