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File: editor/codemirror/src/input/movement.js

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  Classes of Cedric Maenetja   Custom PHP HTML Parser   editor/codemirror/src/input/movement.js   Download  
File: editor/codemirror/src/input/movement.js
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Custom PHP HTML Parser
Process HTML to replace it with parameter values
Author: By
Last change:
Date: 1 year ago
Size: 5,090 bytes
 

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import { Pos } from "../line/pos.js" import { prepareMeasureForLine, measureCharPrepared, wrappedLineExtentChar } from "../measurement/position_measurement.js" import { getBidiPartAt, getOrder } from "../util/bidi.js" import { findFirst, lst, skipExtendingChars } from "../util/misc.js" function moveCharLogically(line, ch, dir) { let target = skipExtendingChars(line.text, ch + dir, dir) return target < 0 || target > line.text.length ? null : target } export function moveLogically(line, start, dir) { let ch = moveCharLogically(line, start.ch, dir) return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before") } export function endOfLine(visually, cm, lineObj, lineNo, dir) { if (visually) { if (cm.doc.direction == "rtl") dir = -dir let order = getOrder(lineObj, cm.doc.direction) if (order) { let part = dir < 0 ? lst(order) : order[0] let moveInStorageOrder = (dir < 0) == (part.level == 1) let sticky = moveInStorageOrder ? "after" : "before" let ch // With a wrapped rtl chunk (possibly spanning multiple bidi parts), // it could be that the last bidi part is not on the last visual line, // since visual lines contain content order-consecutive chunks. // Thus, in rtl, we are looking for the first (content-order) character // in the rtl chunk that is on the last line (that is, the same line // as the last (content-order) character). if (part.level > 0 || cm.doc.direction == "rtl") { let prep = prepareMeasureForLine(cm, lineObj) ch = dir < 0 ? lineObj.text.length - 1 : 0 let targetTop = measureCharPrepared(cm, prep, ch).top ch = findFirst(ch => measureCharPrepared(cm, prep, ch).top == targetTop, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch) if (sticky == "before") ch = moveCharLogically(lineObj, ch, 1) } else ch = dir < 0 ? part.to : part.from return new Pos(lineNo, ch, sticky) } } return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after") } export function moveVisually(cm, line, start, dir) { let bidi = getOrder(line, cm.doc.direction) if (!bidi) return moveLogically(line, start, dir) if (start.ch >= line.text.length) { start.ch = line.text.length start.sticky = "before" } else if (start.ch <= 0) { start.ch = 0 start.sticky = "after" } let partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos] if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) { // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines, // nothing interesting happens. return moveLogically(line, start, dir) } let mv = (pos, dir) => moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir) let prep let getWrappedLineExtent = ch => { if (!cm.options.lineWrapping) return {begin: 0, end: line.text.length} prep = prep || prepareMeasureForLine(cm, line) return wrappedLineExtentChar(cm, line, prep, ch) } let wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch) if (cm.doc.direction == "rtl" || part.level == 1) { let moveInStorageOrder = (part.level == 1) == (dir < 0) let ch = mv(start, moveInStorageOrder ? 1 : -1) if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) { // Case 2: We move within an rtl part or in an rtl editor on the same visual line let sticky = moveInStorageOrder ? "before" : "after" return new Pos(start.line, ch, sticky) } } // Case 3: Could not move within this bidi part in this visual line, so leave // the current bidi part let searchInVisualLine = (partPos, dir, wrappedLineExtent) => { let getRes = (ch, moveInStorageOrder) => moveInStorageOrder ? new Pos(start.line, mv(ch, 1), "before") : new Pos(start.line, ch, "after") for (; partPos >= 0 && partPos < bidi.length; partPos += dir) { let part = bidi[partPos] let moveInStorageOrder = (dir > 0) == (part.level != 1) let ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1) if (part.from <= ch && ch < part.to) return getRes(ch, moveInStorageOrder) ch = moveInStorageOrder ? part.from : mv(part.to, -1) if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) return getRes(ch, moveInStorageOrder) } } // Case 3a: Look for other bidi parts on the same visual line let res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent) if (res) return res // Case 3b: Look for other bidi parts on the next visual line let nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1) if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) { res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh)) if (res) return res } // Case 4: Nowhere to move return null }