dots-hyprland/.config/quickshell/ii/services/LatexRenderer.qml

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QML

pragma Singleton
pragma ComponentBehavior: Bound
import qs.modules.common.functions
import qs.modules.common
import QtQuick
import Quickshell
/**
* Renders LaTeX snippets with MicroTeX.
* For every request:
* 1. Hash it
* 2. Check if the hash is already processed
* 3. If not, render it with MicroTeX and mark as processed
*/
Singleton {
id: root
readonly property var renderPadding: 4 // This is to prevent cutoff in the rendered images
property list<string> processedHashes: []
property var processedExpressions: ({})
property var renderedImagePaths: ({})
property string microtexBinaryDir: "/opt/MicroTeX"
property string microtexBinaryName: "LaTeX"
property string latexOutputPath: Directories.latexOutput
signal renderFinished(string hash, string imagePath)
/**
* Requests rendering of a LaTeX expression.
* Returns the [hash, isNew]
*/
function requestRender(expression) {
// 1. Hash it and initialize necessary variables
const hash = Qt.md5(expression)
const imagePath = `${latexOutputPath}/${hash}.svg`
// 2. Check if the hash is already processed
if (processedHashes.includes(hash)) {
// console.log("Already processed: " + hash)
renderFinished(hash, imagePath)
return [hash, false]
} else {
root.processedHashes.push(hash)
root.processedExpressions[hash] = expression
// console.log("Rendering expression: " + expression)
}
// 3. If not, render it with MicroTeX and mark as processed
// console.log(`[LatexRenderer] Rendering expression: ${expression} with hash: ${hash}`)
// console.log(` to file: ${imagePath}`)
// console.log(` with command: cd ${microtexBinaryDir} && ./${microtexBinaryName} -headless -input=${StringUtils.shellSingleQuoteEscape(expression)} -output=${imagePath} -textsize=${Appearance.font.pixelSize.normal} -padding=${renderPadding} -background=${Appearance.m3colors.m3tertiary} -foreground=${Appearance.m3colors.m3onTertiary} -maxwidth=0.85`)
const processQml = `
import Quickshell.Io
Process {
id: microtexProcess${hash}
running: true
command: [ "bash", "-c",
"cd ${root.microtexBinaryDir} && ./${root.microtexBinaryName} -headless '-input=${StringUtils.shellSingleQuoteEscape(StringUtils.escapeBackslashes(expression))}' "
+ "'-output=${imagePath}' "
+ "'-textsize=${Appearance.font.pixelSize.normal}' "
+ "'-padding=${renderPadding}' "
// + "'-background=${Appearance.m3colors.m3tertiary}' "
+ "'-foreground=${Appearance.colors.colOnLayer1}' "
+ "-maxwidth=0.85 "
]
// stdout: SplitParser {
// onRead: data => { console.log("MicroTeX: " + data) }
// }
onExited: (exitCode, exitStatus) => {
// console.log("[LatexRenderer] MicroTeX process exited with code: " + exitCode + ", status: " + exitStatus)
renderedImagePaths["${hash}"] = "${imagePath}"
root.renderFinished("${hash}", "${imagePath}")
microtexProcess${hash}.destroy()
}
}
`
// console.log("MicroTeX: " + processQml)
Qt.createQmlObject(processQml, root, `MicroTeXProcess_${hash}`)
return [hash, true]
}
}