LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/History/HistoryItem.qml

@@ -116,23 +116,10 @@ Button {
         anchors.verticalCenter: parent.verticalCenter
         visible: !hidden
         font.pixelSize: 14
-        text: ""
+        text: historyAction.getHTMLString().replace(/\$\{tag_color\}/g, clr)
         textFormat: Text.RichText
         clip: true
         wrapMode: Text.WordWrap
-        
-        Component.onCompleted: function() {
-            // Render HTML, might be string, but could also be a promise
-            const html = historyAction.getHTMLString()
-            if(typeof html === "string") {
-                label.text = html.replace(/\$\{tag_color\}/g, clr)
-            } else {
-                // Promise! We need to way to wait for it to be completed.
-                html.then(rendered => {
-                    label.text = rendered.replace(/\$\{tag_color\}/g, clr)
-                })
-            }
-        }
     }
     
     Rectangle {

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/ObjectLists/ObjectRow.qml

@@ -100,26 +100,10 @@ Item {
             anchors.left: parent.left
             visible: Modules.Latex.enabled
             property double depth: Screen.devicePixelRatio
-            source: ""
+            property var ltxInfo: visible ? Latex.render(obj.getLatexString(), depth*(parent.font.pixelSize+2), parent.color).split(",") : ["","0","0"]
-            width: 0/depth
+            source: visible ? ltxInfo[0] : ""
-            height: 0/depth
+            width: parseInt(ltxInfo[1])/depth
-            
+            height: parseInt(ltxInfo[2])/depth
-            Component.onCompleted: function() {
-                if(Modules.Latex.enabled) {
-                    const args = [obj.getLatexString(), depth*(parent.font.pixelSize+2), parent.color]
-                    const prerendered = Modules.Latex.findPrerendered(...args)
-                    if(prerendered !== null) {
-                        source = prerendered.source
-                        width = prerendered.width/depth
-                        height = prerendered.height/depth
-                    } else
-                        Modules.Latex.requestAsyncRender(...args).then(info => {
-                            source = info.source
-                            width = info.width/depth
-                            height = info.height/depth
-                        })
-                }
-            }
         }
         
         MouseArea {

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/canvas.mjs

@@ -16,10 +16,9 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-import { Module } from "./modules.mjs"
+import {Module} from "./modules.mjs"
-import { textsup } from "./utils.mjs"
+import {textsup} from "./utils.mjs"
-import { Expression } from "./mathlib.mjs"
+import {Expression} from "./mathlib.mjs"
-import Latex from "./math/latex.mjs"
 
 
 class CanvasAPI extends Module {
@@ -169,8 +168,6 @@ class CanvasAPI extends Module {
                         obj.draw(this)
                     } catch(e) {
                         // Drawing throws an error. Generally, it's due to a new modification (or the opening of a file)
-                        console.error(e)
-                        console.log(e.stack)
                         this._drawingErrorDialog.showDialog(objType, obj.name, e.message)
                         Modules.History.undo()
                     }
@@ -455,24 +452,23 @@ class CanvasAPI extends Module {
      * Renders latex markup ltxText to an image and loads it. Returns a dictionary with three values: source, width and height.
      * @param {string} ltxText
      * @param {string} color
-     * @param {function(LatexRenderResult|{width: number, height: number, source: string})} callback
+     * @param {function({width: number, height: number, source: string})} callback
      */
     renderLatexImage(ltxText, color, callback) {
-        const onRendered = (imgData) => {
+        let [ltxSrc, ltxWidth, ltxHeight] = Latex.render(ltxText, this.textsize, color).split(",")
-            if(!this._canvas.isImageLoaded(imgData.source) && !this._canvas.isImageLoading(imgData.source)){
+        let imgData = {
-                // Wait until the image is loaded to callback.
+            "source": ltxSrc,
-                this._canvas.loadImage(imgData.source)
+            "width": parseFloat(ltxWidth),
-                this._canvas.imageLoaders[imgData.source] = [callback, imgData]
+            "height": parseFloat(ltxHeight)
-            } else {
+        };
-                // Callback directly
+        if(!this._canvas.isImageLoaded(ltxSrc) && !this._canvas.isImageLoading(ltxSrc)){
-                callback(imgData)
+            // Wait until the image is loaded to callback.
-            }
+            this._canvas.loadImage(ltxSrc)
+            this._canvas.imageLoaders[ltxSrc] = [callback, imgData]
+        } else {
+            // Callback directly
+            callback(imgData)
         }
-        const prerendered = Latex.findPrerendered(ltxText, this.textsize, color)
-        if(prerendered !== null)
-            onRendered(prerendered)
-        else
-            Latex.requestAsyncRender(ltxText, this.textsize, color).then(onRendered)
     }
 
     //
@@ -523,4 +519,4 @@ class CanvasAPI extends Module {
 
 /** @type {CanvasAPI} */
 Modules.Canvas = Modules.Canvas || new CanvasAPI()
-export const API = Modules.Canvas
+export const API = Modules.Canvas

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/history/common.mjs

@@ -109,28 +109,24 @@ export class Action {
      * Renders a LaTeX-formatted string to an image and wraps it in an HTML tag in a string.
      * 
      * @param {string} latexString - Source string of the latex.
-     * @returns {Promise<string>}
+     * @returns {string}
      */
     renderLatexAsHtml(latexString) {
         if(!Latex.enabled)
             throw new Error("Cannot render an item as LaTeX when LaTeX is disabled.")
-        return new Promise(resolve => {
+        let imgDepth = Modules.History.imageDepth
-            let imgDepth = Modules.History.imageDepth
+        let [src, width, height] = Latex.render(
-            Latex.requestAsyncRender(
+            latexString,
-                latexString,
+            imgDepth * (Modules.History.fontSize + 2),
-                imgDepth * (Modules.History.fontSize + 2),
+            Modules.History.themeTextColor
-                Modules.History.themeTextColor
+        ).split(",")
-            ).then((imgData) => {
+        return `<img src="${src}" width="${parseInt(width)/imgDepth}" height="${parseInt(height)/imgDepth}" style="vertical-align: middle"/>`
-                const { source, width, height } = imgData
-                resolve(`<img src="${source}" width="${width/imgDepth}" height="${height/imgDepth}" style="vertical-align: middle"/>`)
-            })
-        })
     }
     
     /**
      * Returns a string with the HTML-formatted description of the action.
      * 
-     * @returns {string|Promise<string>}
+     * @returns {string}
      */
     getHTMLString() {
         return this.getReadableString()

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/history/editproperty.mjs

@@ -85,9 +85,8 @@ export default class EditedProperty extends Action {
     }
     
     setReadableValues() {
-        this.prevString = ""
+        this.prevString = "";
-        this.nextString = ""
+        this.nextString = "";
-        this._renderPromises = []
         if(this.propertyType instanceof Object) {
             switch(this.propertyType.type) {
                 case "Enum":
@@ -119,11 +118,8 @@ export default class EditedProperty extends Action {
         this.prevHTML = '<tt style="background: rgba(128,128,128,0.1);">&nbsp;'+this.prevString+'&nbsp;</tt>'
         this.nextHTML = '<tt style="background: rgba(128,128,128,0.1);">&nbsp;'+this.nextString+'&nbsp;</tt>'
         if(Latex.enabled && typeof this.propertyType == 'object' && this.propertyType.type === "Expression") {
-            // Store promises so that querying can wait for them to finish.
+            this.prevHTML= this.renderLatexAsHtml(this.previousValue.latexMarkup)
-            this._renderPromises = [
+            this.nextHTML= this.renderLatexAsHtml(this.newValue.latexMarkup)
-                this.renderLatexAsHtml(this.previousValue.latexMarkup).then(prev => this.prevHTML = prev),
-                this.renderLatexAsHtml(this.newValue.latexMarkup).then(next => this.nextHTML = prev)
-            ]
         }
     }
     
@@ -135,21 +131,10 @@ export default class EditedProperty extends Action {
     }
     
     getHTMLString() {
-        return new Promise(resolve => {
+        return qsTr('%1 of %2 changed from %3 to %4.')
-            const translation = qsTr('%1 of %2 changed from %3 to %4.')
+                .arg(this.targetPropertyReadable)
-                                    .arg(this.targetPropertyReadable)
+                .arg('<b style="font-size: 15px;">&nbsp;' + this.targetName + '&nbsp;</b>')
-                                    .arg('<b style="font-size: 15px;">&nbsp;' + this.targetName + '&nbsp;</b>')
+                .arg(this.prevHTML)
-            // Check if we need to wait for LaTeX HTML to be rendered.
+                .arg(this.nextHTML)                
-            if(this.prevHTML !== undefined && this.nextHTML !== undefined)
-                resolve(translation.arg(this.prevHTML).arg(this.nextHTML))
-            else
-                Promise.all(this._renderPromises).then((rendered) => {
-                    // Rendered are (potentially) two HTML strings which are defined during rendering
-                    this.prevHTML = this.prevHTML ?? rendered[0]
-                    this.nextHTML = this.prevHTML ?? rendered[1]
-                    resolve(translation.arg(this.prevHTML).arg(this.nextHTML))
-                })
-        })
-        
     }
 }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/history/position.mjs

@@ -61,15 +61,10 @@ export default class EditedPosition extends Action {
     setReadableValues() {
         this.prevString = `(${this.previousXValue.toString()},${this.previousYValue.toString()})`
         this.nextString = `(${this.newXValue.toString()},${this.newYValue.toString()})`
-        this._renderPromises = []
         // Render as LaTeX
         if(Latex.enabled) {
-            const prevMarkup = `\\left(${this.previousXValue.latexMarkup},${this.previousYValue.latexMarkup}\\right)`
+            this.prevHTML = this.renderLatexAsHtml(`\\left(${this.previousXValue.latexMarkup},${this.previousYValue.latexMarkup}\\right)`)
-            const nextMarkup = `\\left(${this.newXValue.latexMarkup},${this.newYValue.latexMarkup}\\right)`
+            this.nextHTML = this.renderLatexAsHtml(`\\left(${this.newXValue.latexMarkup},${this.newYValue.latexMarkup}\\right)`)
-            this._renderPromises = [ // Will be taken in promise.all
-                this.renderLatexAsHtml(prevMarkup),
-                this.renderLatexAsHtml(nextMarkup)
-            ]
         } else {
             this.prevHTML = '<tt style="background: rgba(128,128,128,0.1);">&nbsp;'+escapeHTML(this.prevString)+'&nbsp;</tt>'
             this.nextHTML = '<tt style="background: rgba(128,128,128,0.1);">&nbsp;'+escapeHTML(this.nextString)+'&nbsp;</tt>'
@@ -90,20 +85,9 @@ export default class EditedPosition extends Action {
     }
     
     getHTMLString() {
-        return new Promise(resolve => {
+        return qsTr('Position of %1 set from %2 to %3.')
-            const translation = qsTr('Position of %1 set from %2 to %3.')
+                .arg('<b style="font-size: 15px;">&nbsp;' + this.targetName + '&nbsp;</b>')
-                                    .arg('<b style="font-size: 15px;">&nbsp;' + this.targetName + '&nbsp;</b>')
+                .arg(this.prevHTML)
-            // Check if we need to wait for LaTeX HTML to be rendered.
+                .arg(this.nextHTML)                
-            if(this.prevHTML !== undefined && this.nextHTML !== undefined)
-                resolve(translation.arg(this.prevHTML).arg(this.nextHTML))
-            else
-                Promise.all(this._renderPromises).then((rendered) => {
-                    // Rendered are (potentially) two HTML strings which are defined during rendering
-                    this.prevHTML = this.prevHTML ?? rendered[0]
-                    this.nextHTML = this.prevHTML ?? rendered[1]
-                    resolve(translation.arg(this.prevHTML).arg(this.nextHTML))
-                })
-        })
-                
     }
 }

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/math/latex.mjs

@@ -39,20 +39,6 @@ const equivalchars = ["\\alpha","\\beta","\\gamma","\\delta","\\epsilon","\\zeta
     "{}_{4}","{}_{5}","{}_{6}","{}_{7}","{}_{8}","{}_{9}","{}_{0}",
     "\\pi", "\\infty"]
 
-/**
- * Class containing the result of a LaTeX render.
- * 
- * @property {string} source - Exported PNG file
- * @property {number} width 
- * @property {number} height 
- */
-class LatexRenderResult {
-    constructor(source, width, height) {
-        this.source = source
-        this.width = parseFloat(width)
-        this.height = parseFloat(height)
-    }
-}
 
 class LatexAPI extends Module {
     constructor() {
@@ -64,50 +50,11 @@ class LatexAPI extends Module {
          * true if latex has been enabled by the user, false otherwise.
          */
         this.enabled = Helper.getSettingBool("enable_latex")
-    }
+        /**
-    
+         * Mirror method for Python object.
-    /**
+         * @type {function(string, number, string): string}.
-     * Prepares and renders a latex string into a png file.
+         */
-     * 
+        this.render = Latex.render
-     * @param {string} markup - LaTeX markup to render.
-     * @param {number} fontSize - Font size (in pt) to render.
-     * @param {color} color - Color of the text to render.
-     * @returns {LatexRenderResult}
-     */
-    renderSync(markup, fontSize, color) {
-        let args = Latex.render(markup, fontSize, color).split(",")
-        return new LatexRenderResult(...args)
-    }
-    
-    /**
-     * Checks if the given markup (with given font size and color) has already been
-     * rendered, and if so, returns its data. Otherwise, returns null.
-     * 
-     * @param {string} markup - LaTeX markup to render.
-     * @param {number} fontSize - Font size (in pt) to render.
-     * @param {color} color - Color of the text to render.
-     * @returns {LatexRenderResult|null}
-     */
-    findPrerendered(markup, fontSize, color) {
-        const data = Latex.findPrerendered(markup, fontSize, color)
-        let ret = null
-        if(data !== "")
-            ret = new LatexRenderResult(...data.split(","))
-        return ret
-    }
-    
-    /**
-     * Prepares and renders a latex string into a png file asynchronously.
-     * 
-     * @param {string} markup - LaTeX markup to render.
-     * @param {number} fontSize - Font size (in pt) to render.
-     * @param {color} color - Color of the text to render.
-     * @returns {Promize<LatexRenderResult>}
-     */
-    requestAsyncRender(markup, fontSize, color) {
-        return new Promise(resolve => {
-            resolve(this.renderSync(markup, fontSize, color))
-        })
     }
 
     /**

LogarithmPlotter/util/latex.py

@@ -92,13 +92,15 @@ class Latex(QObject):
             except Exception as e:
                 valid_install = False # Should have sent an error message if failed to render
         return valid_install
+                
 
     @Slot(str, float, QColor, result=str)
     def render(self, latex_markup: str, font_size: float, color: QColor) -> str:
         """
         Prepares and renders a latex string into a png file.
         """
-        markup_hash, export_path = self.create_export_path(latex_markup, font_size, color)
+        markup_hash = "render" + str(hash(latex_markup))
+        export_path = path.join(self.tempdir.name, f'{markup_hash}_{int(font_size)}_{color.rgb()}')
         if self.latexSupported and not path.exists(export_path + ".png"):
             print("Rendering", latex_markup, export_path)
             # Generating file
@@ -119,28 +121,6 @@ class Latex(QObject):
         img = QImage(export_path)
         # Small hack, not very optimized since we load the image twice, but you can't pass a QImage to QML and expect it to be loaded
         return f'{export_path}.png,{img.width()},{img.height()}'
-    
-    @Slot(str, float, QColor, result=str)
-    def findPrerendered(self, latex_markup: str, font_size: float, color: QColor):
-        """
-        Finds a prerendered image and returns its data if possible, and an empty string if not.
-        """
-        markup_hash, export_path = self.create_export_path(latex_markup, font_size, color)
-        data = ""
-        if path.exists(export_path + ".png"):
-            img = QImage(export_path)
-            data = f'{export_path}.png,{img.width()},{img.height()}'
-        return data
-        
-        
-    def create_export_path(self, latex_markup: str, font_size: float, color: QColor):
-        """
-        Standardizes export path for renders.
-        """
-        markup_hash = "render" + str(hash(latex_markup))
-        export_path = path.join(self.tempdir.name, f'{markup_hash}_{int(font_size)}_{color.rgb()}')
-        return markup_hash, export_path
-    
 
     def create_latex_doc(self, export_path: str, latex_markup: str):
         """