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- import { getOrder } from "../util/bidi.js"
- import { ie, ie_version, webkit } from "../util/browser.js"
- import { elt, eltP, joinClasses } from "../util/dom.js"
- import { eventMixin, signal } from "../util/event.js"
- import { hasBadBidiRects, zeroWidthElement } from "../util/feature_detection.js"
- import { lst, spaceStr } from "../util/misc.js"
- import { getLineStyles } from "./highlight.js"
- import { attachMarkedSpans, compareCollapsedMarkers, detachMarkedSpans, lineIsHidden, visualLineContinued } from "./spans.js"
- import { getLine, lineNo, updateLineHeight } from "./utils_line.js"
- // LINE DATA STRUCTURE
- // Line objects. These hold state related to a line, including
- // highlighting info (the styles array).
- export class Line {
- constructor(text, markedSpans, estimateHeight) {
- this.text = text
- attachMarkedSpans(this, markedSpans)
- this.height = estimateHeight ? estimateHeight(this) : 1
- }
- lineNo() { return lineNo(this) }
- }
- eventMixin(Line)
- // Change the content (text, markers) of a line. Automatically
- // invalidates cached information and tries to re-estimate the
- // line's height.
- export function updateLine(line, text, markedSpans, estimateHeight) {
- line.text = text
- if (line.stateAfter) line.stateAfter = null
- if (line.styles) line.styles = null
- if (line.order != null) line.order = null
- detachMarkedSpans(line)
- attachMarkedSpans(line, markedSpans)
- let estHeight = estimateHeight ? estimateHeight(line) : 1
- if (estHeight != line.height) updateLineHeight(line, estHeight)
- }
- // Detach a line from the document tree and its markers.
- export function cleanUpLine(line) {
- line.parent = null
- detachMarkedSpans(line)
- }
- // Convert a style as returned by a mode (either null, or a string
- // containing one or more styles) to a CSS style. This is cached,
- // and also looks for line-wide styles.
- let styleToClassCache = {}, styleToClassCacheWithMode = {}
- function interpretTokenStyle(style, options) {
- if (!style || /^\s*$/.test(style)) return null
- let cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
- return cache[style] ||
- (cache[style] = style.replace(/\S+/g, "cm-$&"))
- }
- // Render the DOM representation of the text of a line. Also builds
- // up a 'line map', which points at the DOM nodes that represent
- // specific stretches of text, and is used by the measuring code.
- // The returned object contains the DOM node, this map, and
- // information about line-wide styles that were set by the mode.
- export function buildLineContent(cm, lineView) {
- // The padding-right forces the element to have a 'border', which
- // is needed on Webkit to be able to get line-level bounding
- // rectangles for it (in measureChar).
- let content = eltP("span", null, null, webkit ? "padding-right: .1px" : null)
- let builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
- col: 0, pos: 0, cm: cm,
- trailingSpace: false,
- splitSpaces: cm.getOption("lineWrapping")}
- lineView.measure = {}
- // Iterate over the logical lines that make up this visual line.
- for (let i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
- let line = i ? lineView.rest[i - 1] : lineView.line, order
- builder.pos = 0
- builder.addToken = buildToken
- // Optionally wire in some hacks into the token-rendering
- // algorithm, to deal with browser quirks.
- if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
- builder.addToken = buildTokenBadBidi(builder.addToken, order)
- builder.map = []
- let allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
- insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
- if (line.styleClasses) {
- if (line.styleClasses.bgClass)
- builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "")
- if (line.styleClasses.textClass)
- builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "")
- }
- // Ensure at least a single node is present, for measuring.
- if (builder.map.length == 0)
- builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure)))
- // Store the map and a cache object for the current logical line
- if (i == 0) {
- lineView.measure.map = builder.map
- lineView.measure.cache = {}
- } else {
- ;(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
- ;(lineView.measure.caches || (lineView.measure.caches = [])).push({})
- }
- }
- // See issue #2901
- if (webkit) {
- let last = builder.content.lastChild
- if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
- builder.content.className = "cm-tab-wrap-hack"
- }
- signal(cm, "renderLine", cm, lineView.line, builder.pre)
- if (builder.pre.className)
- builder.textClass = joinClasses(builder.pre.className, builder.textClass || "")
- return builder
- }
- export function defaultSpecialCharPlaceholder(ch) {
- let token = elt("span", "\u2022", "cm-invalidchar")
- token.title = "\\u" + ch.charCodeAt(0).toString(16)
- token.setAttribute("aria-label", token.title)
- return token
- }
- // Build up the DOM representation for a single token, and add it to
- // the line map. Takes care to render special characters separately.
- function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
- if (!text) return
- let displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
- let special = builder.cm.state.specialChars, mustWrap = false
- let content
- if (!special.test(text)) {
- builder.col += text.length
- content = document.createTextNode(displayText)
- builder.map.push(builder.pos, builder.pos + text.length, content)
- if (ie && ie_version < 9) mustWrap = true
- builder.pos += text.length
- } else {
- content = document.createDocumentFragment()
- let pos = 0
- while (true) {
- special.lastIndex = pos
- let m = special.exec(text)
- let skipped = m ? m.index - pos : text.length - pos
- if (skipped) {
- let txt = document.createTextNode(displayText.slice(pos, pos + skipped))
- if (ie && ie_version < 9) content.appendChild(elt("span", [txt]))
- else content.appendChild(txt)
- builder.map.push(builder.pos, builder.pos + skipped, txt)
- builder.col += skipped
- builder.pos += skipped
- }
- if (!m) break
- pos += skipped + 1
- let txt
- if (m[0] == "\t") {
- let tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
- txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
- txt.setAttribute("role", "presentation")
- txt.setAttribute("cm-text", "\t")
- builder.col += tabWidth
- } else if (m[0] == "\r" || m[0] == "\n") {
- txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
- txt.setAttribute("cm-text", m[0])
- builder.col += 1
- } else {
- txt = builder.cm.options.specialCharPlaceholder(m[0])
- txt.setAttribute("cm-text", m[0])
- if (ie && ie_version < 9) content.appendChild(elt("span", [txt]))
- else content.appendChild(txt)
- builder.col += 1
- }
- builder.map.push(builder.pos, builder.pos + 1, txt)
- builder.pos++
- }
- }
- builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
- if (style || startStyle || endStyle || mustWrap || css || attributes) {
- let fullStyle = style || ""
- if (startStyle) fullStyle += startStyle
- if (endStyle) fullStyle += endStyle
- let token = elt("span", [content], fullStyle, css)
- if (attributes) {
- for (let attr in attributes) if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
- token.setAttribute(attr, attributes[attr])
- }
- return builder.content.appendChild(token)
- }
- builder.content.appendChild(content)
- }
- // Change some spaces to NBSP to prevent the browser from collapsing
- // trailing spaces at the end of a line when rendering text (issue #1362).
- function splitSpaces(text, trailingBefore) {
- if (text.length > 1 && !/ /.test(text)) return text
- let spaceBefore = trailingBefore, result = ""
- for (let i = 0; i < text.length; i++) {
- let ch = text.charAt(i)
- if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
- ch = "\u00a0"
- result += ch
- spaceBefore = ch == " "
- }
- return result
- }
- // Work around nonsense dimensions being reported for stretches of
- // right-to-left text.
- function buildTokenBadBidi(inner, order) {
- return (builder, text, style, startStyle, endStyle, css, attributes) => {
- style = style ? style + " cm-force-border" : "cm-force-border"
- let start = builder.pos, end = start + text.length
- for (;;) {
- // Find the part that overlaps with the start of this text
- let part
- for (let i = 0; i < order.length; i++) {
- part = order[i]
- if (part.to > start && part.from <= start) break
- }
- if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, css, attributes)
- inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes)
- startStyle = null
- text = text.slice(part.to - start)
- start = part.to
- }
- }
- }
- function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
- let widget = !ignoreWidget && marker.widgetNode
- if (widget) builder.map.push(builder.pos, builder.pos + size, widget)
- if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
- if (!widget)
- widget = builder.content.appendChild(document.createElement("span"))
- widget.setAttribute("cm-marker", marker.id)
- }
- if (widget) {
- builder.cm.display.input.setUneditable(widget)
- builder.content.appendChild(widget)
- }
- builder.pos += size
- builder.trailingSpace = false
- }
- // Outputs a number of spans to make up a line, taking highlighting
- // and marked text into account.
- function insertLineContent(line, builder, styles) {
- let spans = line.markedSpans, allText = line.text, at = 0
- if (!spans) {
- for (let i = 1; i < styles.length; i+=2)
- builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options))
- return
- }
- let len = allText.length, pos = 0, i = 1, text = "", style, css
- let nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes
- for (;;) {
- if (nextChange == pos) { // Update current marker set
- spanStyle = spanEndStyle = spanStartStyle = css = ""
- attributes = null
- collapsed = null; nextChange = Infinity
- let foundBookmarks = [], endStyles
- for (let j = 0; j < spans.length; ++j) {
- let sp = spans[j], m = sp.marker
- if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
- foundBookmarks.push(m)
- } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
- if (sp.to != null && sp.to != pos && nextChange > sp.to) {
- nextChange = sp.to
- spanEndStyle = ""
- }
- if (m.className) spanStyle += " " + m.className
- if (m.css) css = (css ? css + ";" : "") + m.css
- if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle
- if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to)
- // support for the old title property
- // https://github.com/codemirror/CodeMirror/pull/5673
- if (m.title) (attributes || (attributes = {})).title = m.title
- if (m.attributes) {
- for (let attr in m.attributes)
- (attributes || (attributes = {}))[attr] = m.attributes[attr]
- }
- if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
- collapsed = sp
- } else if (sp.from > pos && nextChange > sp.from) {
- nextChange = sp.from
- }
- }
- if (endStyles) for (let j = 0; j < endStyles.length; j += 2)
- if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j]
- if (!collapsed || collapsed.from == pos) for (let j = 0; j < foundBookmarks.length; ++j)
- buildCollapsedSpan(builder, 0, foundBookmarks[j])
- if (collapsed && (collapsed.from || 0) == pos) {
- buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
- collapsed.marker, collapsed.from == null)
- if (collapsed.to == null) return
- if (collapsed.to == pos) collapsed = false
- }
- }
- if (pos >= len) break
- let upto = Math.min(len, nextChange)
- while (true) {
- if (text) {
- let end = pos + text.length
- if (!collapsed) {
- let tokenText = end > upto ? text.slice(0, upto - pos) : text
- builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
- spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes)
- }
- if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
- pos = end
- spanStartStyle = ""
- }
- text = allText.slice(at, at = styles[i++])
- style = interpretTokenStyle(styles[i++], builder.cm.options)
- }
- }
- }
- // These objects are used to represent the visible (currently drawn)
- // part of the document. A LineView may correspond to multiple
- // logical lines, if those are connected by collapsed ranges.
- export function LineView(doc, line, lineN) {
- // The starting line
- this.line = line
- // Continuing lines, if any
- this.rest = visualLineContinued(line)
- // Number of logical lines in this visual line
- this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
- this.node = this.text = null
- this.hidden = lineIsHidden(doc, line)
- }
- // Create a range of LineView objects for the given lines.
- export function buildViewArray(cm, from, to) {
- let array = [], nextPos
- for (let pos = from; pos < to; pos = nextPos) {
- let view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
- nextPos = pos + view.size
- array.push(view)
- }
- return array
- }
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