189 lines
7.7 KiB
JavaScript
189 lines
7.7 KiB
JavaScript
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import { buildLineContent } from "../line/line_data.js"
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import { lineNumberFor } from "../line/utils_line.js"
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import { ie, ie_version } from "../util/browser.js"
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import { elt } from "../util/dom.js"
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import { signalLater } from "../util/operation_group.js"
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// When an aspect of a line changes, a string is added to
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// lineView.changes. This updates the relevant part of the line's
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// DOM structure.
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export function updateLineForChanges(cm, lineView, lineN, dims) {
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for (let j = 0; j < lineView.changes.length; j++) {
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let type = lineView.changes[j]
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if (type == "text") updateLineText(cm, lineView)
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else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims)
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else if (type == "class") updateLineClasses(cm, lineView)
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else if (type == "widget") updateLineWidgets(cm, lineView, dims)
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}
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lineView.changes = null
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}
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// Lines with gutter elements, widgets or a background class need to
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// be wrapped, and have the extra elements added to the wrapper div
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function ensureLineWrapped(lineView) {
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if (lineView.node == lineView.text) {
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lineView.node = elt("div", null, null, "position: relative")
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if (lineView.text.parentNode)
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lineView.text.parentNode.replaceChild(lineView.node, lineView.text)
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lineView.node.appendChild(lineView.text)
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if (ie && ie_version < 8) lineView.node.style.zIndex = 2
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}
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return lineView.node
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}
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function updateLineBackground(cm, lineView) {
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let cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
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if (cls) cls += " CodeMirror-linebackground"
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if (lineView.background) {
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if (cls) lineView.background.className = cls
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else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
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} else if (cls) {
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let wrap = ensureLineWrapped(lineView)
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lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
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cm.display.input.setUneditable(lineView.background)
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}
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}
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// Wrapper around buildLineContent which will reuse the structure
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// in display.externalMeasured when possible.
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function getLineContent(cm, lineView) {
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let ext = cm.display.externalMeasured
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if (ext && ext.line == lineView.line) {
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cm.display.externalMeasured = null
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lineView.measure = ext.measure
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return ext.built
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}
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return buildLineContent(cm, lineView)
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}
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// Redraw the line's text. Interacts with the background and text
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// classes because the mode may output tokens that influence these
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// classes.
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function updateLineText(cm, lineView) {
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let cls = lineView.text.className
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let built = getLineContent(cm, lineView)
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if (lineView.text == lineView.node) lineView.node = built.pre
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lineView.text.parentNode.replaceChild(built.pre, lineView.text)
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lineView.text = built.pre
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if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
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lineView.bgClass = built.bgClass
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lineView.textClass = built.textClass
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updateLineClasses(cm, lineView)
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} else if (cls) {
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lineView.text.className = cls
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}
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}
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function updateLineClasses(cm, lineView) {
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updateLineBackground(cm, lineView)
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if (lineView.line.wrapClass)
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ensureLineWrapped(lineView).className = lineView.line.wrapClass
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else if (lineView.node != lineView.text)
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lineView.node.className = ""
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let textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
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lineView.text.className = textClass || ""
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}
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function updateLineGutter(cm, lineView, lineN, dims) {
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if (lineView.gutter) {
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lineView.node.removeChild(lineView.gutter)
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lineView.gutter = null
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}
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if (lineView.gutterBackground) {
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lineView.node.removeChild(lineView.gutterBackground)
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lineView.gutterBackground = null
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}
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if (lineView.line.gutterClass) {
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let wrap = ensureLineWrapped(lineView)
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lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
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`left: ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px; width: ${dims.gutterTotalWidth}px`)
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cm.display.input.setUneditable(lineView.gutterBackground)
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wrap.insertBefore(lineView.gutterBackground, lineView.text)
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}
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let markers = lineView.line.gutterMarkers
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if (cm.options.lineNumbers || markers) {
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let wrap = ensureLineWrapped(lineView)
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let gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", `left: ${cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth}px`)
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cm.display.input.setUneditable(gutterWrap)
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wrap.insertBefore(gutterWrap, lineView.text)
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if (lineView.line.gutterClass)
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gutterWrap.className += " " + lineView.line.gutterClass
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if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
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lineView.lineNumber = gutterWrap.appendChild(
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elt("div", lineNumberFor(cm.options, lineN),
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"CodeMirror-linenumber CodeMirror-gutter-elt",
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`left: ${dims.gutterLeft["CodeMirror-linenumbers"]}px; width: ${cm.display.lineNumInnerWidth}px`))
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if (markers) for (let k = 0; k < cm.display.gutterSpecs.length; ++k) {
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let id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id]
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if (found)
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gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
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`left: ${dims.gutterLeft[id]}px; width: ${dims.gutterWidth[id]}px`))
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}
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}
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}
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function updateLineWidgets(cm, lineView, dims) {
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if (lineView.alignable) lineView.alignable = null
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for (let node = lineView.node.firstChild, next; node; node = next) {
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next = node.nextSibling
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if (node.className == "CodeMirror-linewidget")
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lineView.node.removeChild(node)
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}
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insertLineWidgets(cm, lineView, dims)
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}
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// Build a line's DOM representation from scratch
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export function buildLineElement(cm, lineView, lineN, dims) {
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let built = getLineContent(cm, lineView)
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lineView.text = lineView.node = built.pre
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if (built.bgClass) lineView.bgClass = built.bgClass
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if (built.textClass) lineView.textClass = built.textClass
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updateLineClasses(cm, lineView)
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updateLineGutter(cm, lineView, lineN, dims)
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insertLineWidgets(cm, lineView, dims)
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return lineView.node
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}
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// A lineView may contain multiple logical lines (when merged by
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// collapsed spans). The widgets for all of them need to be drawn.
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function insertLineWidgets(cm, lineView, dims) {
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insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
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if (lineView.rest) for (let i = 0; i < lineView.rest.length; i++)
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insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false)
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}
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function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
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if (!line.widgets) return
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let wrap = ensureLineWrapped(lineView)
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for (let i = 0, ws = line.widgets; i < ws.length; ++i) {
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let widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
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if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true")
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positionLineWidget(widget, node, lineView, dims)
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cm.display.input.setUneditable(node)
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if (allowAbove && widget.above)
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wrap.insertBefore(node, lineView.gutter || lineView.text)
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else
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wrap.appendChild(node)
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signalLater(widget, "redraw")
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}
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}
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function positionLineWidget(widget, node, lineView, dims) {
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if (widget.noHScroll) {
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;(lineView.alignable || (lineView.alignable = [])).push(node)
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let width = dims.wrapperWidth
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node.style.left = dims.fixedPos + "px"
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if (!widget.coverGutter) {
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width -= dims.gutterTotalWidth
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node.style.paddingLeft = dims.gutterTotalWidth + "px"
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}
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node.style.width = width + "px"
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}
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if (widget.coverGutter) {
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node.style.zIndex = 5
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node.style.position = "relative"
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if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px"
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}
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}
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