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Code Issues Releases Wiki Activity

fix scrolling with only one big paragraph

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This commit is contained in:
Baptiste Augrain
2020-05-16 14:19:22 +02:00
parent 40d10eae04
commit 81ac3d1748
1 changed files with 50 additions and 35 deletions
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85
browser/components/MarkdownSplitEditor.js
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@@ -43,8 +43,9 @@ class MarkdownSplitEditor extends React.Component {
if (line === 0) {
top = 0
} else {
const blockElements = previewDoc.querySelectorAll('body [data-line]')
const blocks = []
for (const block of previewDoc.querySelectorAll('body [data-line]')) {
for (const block of blockElements) {
const l = parseInt(block.getAttribute('data-line'))
blocks.push({
@@ -57,25 +58,27 @@ class MarkdownSplitEditor extends React.Component {
}
}
const i = blocks.length - 1
if (i > 0) {
const ratio =
(blocks[i].top - blocks[i - 1].top) /
(blocks[i].line - blocks[i - 1].line)
if (blocks.length === 1) {
const block = blockElements[blockElements.length - 1]
const delta = Math.floor(_.get(previewDoc, 'body.clientHeight') / 3)
top =
blocks[i - 1].top +
Math.floor((line - blocks[i - 1].line) * ratio) -
delta
} else {
const srcTop = _.get(editor.doc, 'scrollTop')
const srcHeight = _.get(editor.doc, 'height')
const targetHeight = _.get(previewDoc, 'body.scrollHeight')
top = (targetHeight * srcTop) / srcHeight
blocks.push({
line: editor.doc.size,
top: block.offsetTop + block.offsetHeight
})
}
const i = blocks.length - 1
const ratio =
(blocks[i].top - blocks[i - 1].top) /
(blocks[i].line - blocks[i - 1].line)
const delta = Math.floor(_.get(previewDoc, 'body.clientHeight') / 3)
top =
blocks[i - 1].top +
Math.floor((line - blocks[i - 1].line) * ratio) -
delta
}
this.scrollTo(previewTop, top, y =>
@@ -118,8 +121,9 @@ class MarkdownSplitEditor extends React.Component {
} else {
const line = from + Math.floor((to - from) / 3)
const blockElements = previewDoc.querySelectorAll('body [data-line]')
const blocks = []
for (const block of previewDoc.querySelectorAll('body [data-line]')) {
for (const block of blockElements) {
const l = parseInt(block.getAttribute('data-line'))
blocks.push({
@@ -132,6 +136,15 @@ class MarkdownSplitEditor extends React.Component {
}
}
if (blocks.length === 1) {
const block = blockElements[blockElements.length - 1]
blocks.push({
line: codeDoc.size,
top: block.offsetTop + block.offsetHeight
})
}
const i = blocks.length - 1
const ratio =
@@ -166,8 +179,9 @@ class MarkdownSplitEditor extends React.Component {
const delta = Math.floor(_.get(previewDoc, 'body.clientHeight') / 3)
const previewTop = srcTop + delta
const blockElements = previewDoc.querySelectorAll('body [data-line]')
const blocks = []
for (const block of previewDoc.querySelectorAll('body [data-line]')) {
for (const block of blockElements) {
const top = block.offsetTop
blocks.push({
@@ -180,23 +194,24 @@ class MarkdownSplitEditor extends React.Component {
}
}
const i = blocks.length - 1
if (i > 0) {
const from = codeDoc.cm.heightAtLine(blocks[i - 1].line, 'local')
const to = codeDoc.cm.heightAtLine(blocks[i].line, 'local')
if (blocks.length === 1) {
const block = blockElements[blockElements.length - 1]
const ratio =
(previewTop - blocks[i - 1].top) /
(blocks[i].top - blocks[i - 1].top)
top = from + Math.floor((to - from) * ratio) - delta
} else {
const srcTop = _.get(previewDoc, 'body.scrollTop')
const srcHeight = _.get(previewDoc, 'body.scrollHeight')
const targetHeight = _.get(codeDoc, 'height')
top = (targetHeight * srcTop) / srcHeight
blocks.push({
line: codeDoc.size,
top: block.offsetTop + block.offsetHeight
})
}
const i = blocks.length - 1
const from = codeDoc.cm.heightAtLine(blocks[i - 1].line, 'local')
const to = codeDoc.cm.heightAtLine(blocks[i].line, 'local')
const ratio =
(previewTop - blocks[i - 1].top) / (blocks[i].top - blocks[i - 1].top)
top = from + Math.floor((to - from) * ratio) - delta
}
this.scrollTo(editorTop, top, y => codeDoc.cm.scrollTo(0, y))