Skip to content

fix height of mermaid diagrams #2585

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Dec 25, 2019
Merged

fix height of mermaid diagrams #2585

Show file tree
Hide file tree
Changes from 3 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
2fc37d5
fix height of mermaid's diagrams
daiyam Nov 8, 2018
b6b29e0
fix lint error
daiyam Nov 8, 2018
a58b6f1
Merge branch 'master' into fix-mermaid-height
daiyam Dec 24, 2018
b83d3e5
Merge branch 'master' into fix-mermaid-height
daiyam Dec 22, 2019
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions browser/components/MarkdownPreview.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -209,6 +209,7 @@ export default class MarkdownPreview extends React.Component {
this.saveAsMdHandler = () => this.handleSaveAsMd()
this.saveAsHtmlHandler = () => this.handleSaveAsHtml()
this.printHandler = () => this.handlePrint()
this.resizeHandler = _.throttle(this.handleResize.bind(this), 100)

this.linkClickHandler = this.handleLinkClick.bind(this)
this.initMarkdown = this.initMarkdown.bind(this)
Expand Down Expand Up @@ -462,6 +463,10 @@ export default class MarkdownPreview extends React.Component {
'scroll',
this.scrollHandler
)
this.refs.root.contentWindow.addEventListener(
'resize',
this.resizeHandler
)
eventEmitter.on('export:save-text', this.saveAsTextHandler)
eventEmitter.on('export:save-md', this.saveAsMdHandler)
eventEmitter.on('export:save-html', this.saveAsHtmlHandler)
Expand Down Expand Up @@ -499,6 +504,10 @@ export default class MarkdownPreview extends React.Component {
'scroll',
this.scrollHandler
)
this.refs.root.contentWindow.removeEventListener(
'resize',
this.resizeHandler
)
eventEmitter.off('export:save-text', this.saveAsTextHandler)
eventEmitter.off('export:save-md', this.saveAsMdHandler)
eventEmitter.off('export:save-html', this.saveAsHtmlHandler)
Expand Down Expand Up @@ -804,6 +813,15 @@ export default class MarkdownPreview extends React.Component {
)
}

handleResize () {
_.forEach(
this.refs.root.contentWindow.document.querySelectorAll('svg[ratio]'),
el => {
el.setAttribute('height', el.clientWidth / el.getAttribute('ratio'))
}
)
}

focus () {
this.refs.root.focus()
}
Expand Down
3 changes: 3 additions & 0 deletions browser/components/markdown.styl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -421,6 +421,9 @@ pre.fence
canvas, svg
max-width 100% !important

svg[ratio]
width 100%

.gallery
width 100%
height 50vh
Expand Down
23 changes: 21 additions & 2 deletions browser/components/render/MermaidRender.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,17 +22,36 @@ function getId () {
function render (element, content, theme) {
try {
const height = element.attributes.getNamedItem('data-height')
if (height && height.value !== 'undefined') {
const isPredefined = height && height.value !== 'undefined'
if (isPredefined) {
element.style.height = height.value + 'vh'
}
const isDarkTheme = theme === 'dark' || theme === 'solarized-dark' || theme === 'monokai' || theme === 'dracula'
mermaidAPI.initialize({
theme: isDarkTheme ? 'dark' : 'default',
themeCSS: isDarkTheme ? darkThemeStyling : '',
useMaxWidth: false
gantt: {
useWidth: element.clientWidth
}
})
mermaidAPI.render(getId(), content, (svgGraph) => {
element.innerHTML = svgGraph

if (!isPredefined) {
const el = element.firstChild
const viewBox = el.getAttribute('viewBox').split(' ')

let ratio = viewBox[2] / viewBox[3]

if (el.style.maxWidth) {
const maxWidth = parseFloat(el.style.maxWidth)

ratio *= el.parentNode.clientWidth / maxWidth
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This may sound silly but can you explain to me how this works? 😄 Why did you multiply ratio with clientWidth / maxWidth?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It's to compensate the max-width 100% !important applied on the svg.
el.parentNode.clientWidth / maxWidth is the ratio between the available space and the diagram that mermaid wanted.

}

el.setAttribute('ratio', ratio)
el.setAttribute('height', el.parentNode.clientWidth / ratio)
}
})
} catch (e) {
element.className = 'mermaid-error'
Expand Down