/var/www/coffee-cms.ru/html: .cms/lib/codemirror/src/display/update_lines.js comparison

comparison .cms/lib/codemirror/src/display/update_lines.js @ 0:78edf6b517a0 draft

24.10

author	Coffee CMS <info@coffee-cms.ru>
date	Fri, 11 Oct 2024 22:40:23 +0000
parents
children

comparison

equal deleted inserted replaced

--1:000000000000
+:78edf6b517a0
+import { heightAtLine } from "../line/spans.js"
+import { getLine, lineAtHeight, updateLineHeight } from "../line/utils_line.js"
+import { paddingTop, charWidth } from "../measurement/position_measurement.js"
+import { ie, ie_version } from "../util/browser.js"
+// Read the actual heights of the rendered lines, and update their
+// stored heights to match.
+export function updateHeightsInViewport(cm) {
+let display = cm.display
+let prevBottom = display.lineDiv.offsetTop
+let viewTop = Math.max(0, display.scroller.getBoundingClientRect().top)
+let oldHeight = display.lineDiv.getBoundingClientRect().top
+let mustScroll = 0
+for (let i = 0; i < display.view.length; i++) {
+let cur = display.view[i], wrapping = cm.options.lineWrapping
+let height, width = 0
+if (cur.hidden) continue
+oldHeight += cur.line.height
+if (ie && ie_version < 8) {
+let bot = cur.node.offsetTop + cur.node.offsetHeight
+height = bot - prevBottom
+prevBottom = bot
+} else {
+let box = cur.node.getBoundingClientRect()
+height = box.bottom - box.top
+// Check that lines don't extend past the right of the current
+// editor width
+if (!wrapping && cur.text.firstChild)
+width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1
+}
+let diff = cur.line.height - height
+if (diff > .005 || diff < -.005) {
+if (oldHeight < viewTop) mustScroll -= diff
+updateLineHeight(cur.line, height)
+updateWidgetHeight(cur.line)
+if (cur.rest) for (let j = 0; j < cur.rest.length; j++)
+updateWidgetHeight(cur.rest[j])
+}
+if (width > cm.display.sizerWidth) {
+let chWidth = Math.ceil(width / charWidth(cm.display))
+if (chWidth > cm.display.maxLineLength) {
+cm.display.maxLineLength = chWidth
+cm.display.maxLine = cur.line
+cm.display.maxLineChanged = true
+}
+}
+}
+if (Math.abs(mustScroll) > 2) display.scroller.scrollTop += mustScroll
+}
+// Read and store the height of line widgets associated with the
+// given line.
+function updateWidgetHeight(line) {
+if (line.widgets) for (let i = 0; i < line.widgets.length; ++i) {
+let w = line.widgets[i], parent = w.node.parentNode
+if (parent) w.height = parent.offsetHeight
+}
+}
+// Compute the lines that are visible in a given viewport (defaults
+// the current scroll position). viewport may contain top,
+// height, and ensure (see op.scrollToPos) properties.
+export function visibleLines(display, doc, viewport) {
+let top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
+top = Math.floor(top - paddingTop(display))
+let bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight
+let from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
+// Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+// forces those lines into the viewport (if possible).
+if (viewport && viewport.ensure) {
+let ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
+if (ensureFrom < from) {
+from = ensureFrom
+to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
+} else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
+to = ensureTo
+}
+}
+return {from: from, to: Math.max(to, from + 1)}
+}