/*
Scribble Helper can improve handwriting and add links. It lets you create and edit text elements, including wrapped text and sticky notes, by double-tapping on the canvas. When you run the script, it creates an event handler that will activate the editor when you double-tap. If you select a text element on the canvas before running the script, it will open the editor for that element. If you use a pen, you can set it up to only activate Scribble Helper when you double-tap with the pen. The event handler is removed when you run the script a second time or switch to a different tab.
```javascript
*/
if(!ea.verifyMinimumPluginVersion || !ea.verifyMinimumPluginVersion("1.8.25")) {
new Notice("This script requires a newer version of Excalidraw. Please install the latest version.");
return;
}
const helpLINK = "https://youtu.be/BvYkOaly-QM";
const DBLCLICKTIMEOUT = 300;
const maxWidth = 600;
const padding = 6;
const api = ea.getExcalidrawAPI();
const win = ea.targetView.ownerWindow;
if(!win.ExcalidrawScribbleHelper) win.ExcalidrawScribbleHelper = {};
if(typeof win.ExcalidrawScribbleHelper.penOnly === "undefined") {
win.ExcalidrawScribbleHelper.penOnly = false;
}
let windowOpen = false; //to prevent the modal window to open again while writing with scribble
let prevZoomValue = api.getAppState().zoom.value; //used to avoid trigger on pinch zoom
// -------------
// Load settings
// -------------
let settings = ea.getScriptSettings();
//set default values on first-ever run of the script
if(!settings["Default action"]) {
settings = {
"Default action" : {
value: "Text",
valueset: ["Text","Sticky","Wrap"],
description: "What type of element should CTRL/CMD+ENTER create. TEXT: A regular text element. " +
"STICKY: A sticky note with border color and background color " +
"(using the current setting of the canvas). STICKY: A sticky note with transparent " +
"border and background color."
},
};
await ea.setScriptSettings(settings);
}
if(typeof win.ExcalidrawScribbleHelper.action === "undefined") {
win.ExcalidrawScribbleHelper.action = settings["Default action"].value;
}
//---------------------------------------
// Color Palette for stroke color setting
//---------------------------------------
// https://github.com/zsviczian/obsidian-excalidraw-plugin/releases/tag/1.6.8
const defaultStrokeColors = [
"#000000", "#343a40", "#495057", "#c92a2a", "#a61e4d",
"#862e9c", "#5f3dc4", "#364fc7", "#1864ab", "#0b7285",
"#087f5b", "#2b8a3e", "#5c940d", "#e67700", "#d9480f"
];
const loadColorPalette = () => {
const st = api.getAppState();
const strokeColors = new Set();
let strokeColorPalette = st.colorPalette?.elementStroke ?? defaultStrokeColors;
if(Object.entries(strokeColorPalette).length === 0) {
strokeColorPalette = defaultStrokeColors;
}
ea.getViewElements().forEach(el => {
if(el.strokeColor.toLowerCase()==="transparent") return;
strokeColors.add(el.strokeColor);
});
strokeColorPalette.forEach(color => {
strokeColors.add(color)
});
strokeColors.add(st.currentItemStrokeColor ?? ea.style.strokeColor);
return strokeColors;
}
//----------------------------------------------------------
// Define variables to cache element location on first click
//----------------------------------------------------------
// if a single element is selected when the action is started, update that existing text
let containerElements = ea.getViewSelectedElements()
.filter(el=>["arrow","rectangle","ellipse","line","diamond"].contains(el.type));
let selectedTextElements = ea.getViewSelectedElements().filter(el=>el.type==="text");
//-------------------------------------------
// Functions to add and remove event listners
//-------------------------------------------
const addEventHandler = (handler) => {
if(win.ExcalidrawScribbleHelper.eventHandler) {
win.removeEventListner("pointerdown", handler);
}
win.addEventListener("pointerdown",handler);
win.ExcalidrawScribbleHelper.eventHandler = handler;
win.ExcalidrawScribbleHelper.window = win;
}
const removeEventHandler = (handler) => {
win.removeEventListener("pointerdown",handler);
delete win.ExcalidrawScribbleHelper.eventHandler;
delete win.ExcalidrawScribbleHelper.window;
}
//Stop the script if scribble helper is clicked and no eligable element is selected
let silent = false;
if (win.ExcalidrawScribbleHelper?.eventHandler) {
removeEventHandler(win.ExcalidrawScribbleHelper.eventHandler);
delete win.ExcalidrawScribbleHelper.eventHandler;
delete win.ExcalidrawScribbleHelper.window;
if(!(containerElements.length === 1 || selectedTextElements.length === 1)) {
new Notice ("Scribble Helper was stopped",1000);
return;
}
silent = true;
}
// ----------------------
// Custom dialog controls
// ----------------------
if (typeof win.ExcalidrawScribbleHelper.penOnly === "undefined") {
win.ExcalidrawScribbleHelper.penOnly = undefined;
}
if (typeof win.ExcalidrawScribbleHelper.penDetected === "undefined") {
win.ExcalidrawScribbleHelper.penDetected = false;
}
let timer = Date.now();
let eventHandler = () => {};
const customControls = (container) => {
const helpDIV = container.createDiv();
helpDIV.innerHTML = `<a href="${helpLINK}" target="_blank">Click here for help</a>`;
const viewBackground = api.getAppState().viewBackgroundColor;
const el1 = new ea.obsidian.Setting(container)
.setName(`Text color`)
.addDropdown(dropdown => {
Array.from(loadColorPalette()).forEach(color => {
const options = dropdown.addOption(color, color).selectEl.options;
options[options.length-1].setAttribute("style",`color: ${color
}; background: ${viewBackground};`);
});
dropdown
.setValue(ea.style.strokeColor)
.onChange(value => {
ea.style.strokeColor = value;
el1.nameEl.style.color = value;
})
})
el1.nameEl.style.color = ea.style.strokeColor;
el1.nameEl.style.background = viewBackground;
el1.nameEl.style.fontWeight = "bold";
const el2 = new ea.obsidian.Setting(container)
.setName(`Trigger editor by pen double tap only`)
.addToggle((toggle) => toggle
.setValue(win.ExcalidrawScribbleHelper.penOnly)
.onChange(value => {
win.ExcalidrawScribbleHelper.penOnly = value;
})
)
el2.settingEl.style.border = "none";
el2.settingEl.style.display = win.ExcalidrawScribbleHelper.penDetected ? "" : "none";
}
// -------------------------------
// Click / dbl click event handler
// -------------------------------
eventHandler = async (evt) => {
if(windowOpen) return;
if(ea.targetView !== app.workspace.activeLeaf.view) removeEventHandler(eventHandler);
if(evt && evt.target && !evt.target.hasClass("excalidraw__canvas")) return;
if(evt && (evt.ctrlKey || evt.altKey || evt.metaKey || evt.shiftKey)) return;
const st = api.getAppState();
win.ExcalidrawScribbleHelper.penDetected = st.penDetected;
//don't trigger text editor when editing a line or arrow
if(st.editingElement && ["arrow","line"].contains(st.editingElment.type)) return;
if(typeof win.ExcalidrawScribbleHelper.penOnly === "undefined") {
win.ExcalidrawScribbleHelper.penOnly = false;
}
if (evt && win.ExcalidrawScribbleHelper.penOnly &&
win.ExcalidrawScribbleHelper.penDetected && evt.pointerType !== "pen") return;
const now = Date.now();
//the <50 condition is to avoid false double click when pinch zooming
if((now-timer > DBLCLICKTIMEOUT) || (now-timer < 50)) {
prevZoomValue = st.zoom.value;
timer = now;
containerElements = ea.getViewSelectedElements()
.filter(el=>["arrow","rectangle","ellipse","line","diamond"].contains(el.type));
selectedTextElements = ea.getViewSelectedElements().filter(el=>el.type==="text");
return;
}
//further safeguard against triggering when pinch zooming
if(st.zoom.value !== prevZoomValue) return;
//sleeping to allow keyboard to pop up on mobile devices
await sleep(200);
ea.clear();
//if a single element with text is selected, edit the text
//(this can be an arrow, a sticky note, or just a text element)
if(selectedTextElements.length === 1) {
editExistingTextElement(selectedTextElements);
return;
}
let containerID;
let container;
//if no text elements are selected (i.e. not multiple text elements selected),
//check if there is a single eligeable container selected
if(selectedTextElements.length === 0) {
if(containerElements.length === 1) {
ea.copyViewElementsToEAforEditing(containerElements);
containerID = containerElements[0].id
container = ea.getElement(containerID);
}
}
const {x,y} = ea.targetView.currentPosition;
if(ea.targetView !== app.workspace.activeLeaf.view) return;
const actionButtons = [
{
caption: `A`,
tooltip: "Add as Text Element",
action: () => {
win.ExcalidrawScribbleHelper.action="Text";
if(settings["Default action"].value!=="Text") {
settings["Default action"].value = "Text";
ea.setScriptSettings(settings);
};
return;
}
},
{
caption: "📝",
tooltip: "Add as Sticky Note (rectangle with border color and background color)",
action: () => {
win.ExcalidrawScribbleHelper.action="Sticky";
if(settings["Default action"].value!=="Sticky") {
settings["Default action"].value = "Sticky";
ea.setScriptSettings(settings);
};
return;
}
},
{
caption: "☱",
tooltip: "Add as Wrapped Text (rectangle with transparent border and background)",
action: () => {
win.ExcalidrawScribbleHelper.action="Wrap";
if(settings["Default action"].value!=="Wrap") {
settings["Default action"].value = "Wrap";
ea.setScriptSettings(settings);
};
return;
}
}
];
if(win.ExcalidrawScribbleHelper.action !== "Text") actionButtons.push(actionButtons.shift());
if(win.ExcalidrawScribbleHelper.action === "Wrap") actionButtons.push(actionButtons.shift());
ea.style.strokeColor = st.currentItemStrokeColor ?? ea.style.strokeColor;
ea.style.roughness = st.currentItemRoughness ?? ea.style.roughness;
ea.setStrokeSharpness(st.currentItemRoundness === "round" ? 0 : st.currentItemRoundness)
ea.style.backgroundColor = st.currentItemBackgroundColor ?? ea.style.backgroundColor;
ea.style.fillStyle = st.currentItemFillStyle ?? ea.style.fillStyle;
ea.style.fontFamily = st.currentItemFontFamily ?? ea.style.fontFamily;
ea.style.fontSize = st.currentItemFontSize ?? ea.style.fontSize;
ea.style.textAlign = (container && ["arrow","line"].contains(container.type))
? "center"
: (container && ["rectangle","diamond","ellipse"].contains(container.type))
? "center"
: st.currentItemTextAlign ?? "center";
ea.style.verticalAlign = "middle";
windowOpen = true;
const text = await utils.inputPrompt (
"Edit text", "", "", containerID?undefined:actionButtons, 5, true, customControls, true
);
windowOpen = false;
if(!text || text.trim() === "") return;
const textId = ea.addText(x,y, text);
if (!container && (win.ExcalidrawScribbleHelper.action === "Text")) {
ea.addElementsToView(false, false, true);
addEventHandler(eventHandler);
return;
}
const textEl = ea.getElement(textId);
if(!container && (win.ExcalidrawScribbleHelper.action === "Wrap")) {
ea.style.backgroundColor = "transparent";
ea.style.strokeColor = "transparent";
}
if(!container && (win.ExcalidrawScribbleHelper.action === "Sticky")) {
textEl.textAlign = "center";
}
const boxes = [];
if(container) {
boxes.push(containerID);
const linearElement = ["arrow","line"].contains(container.type);
const l = linearElement ? container.points.length-1 : 0;
const dx = linearElement && (container.points[l][0] < 0) ? -1 : 1;
const dy = linearElement && (container.points[l][1] < 0) ? -1 : 1;
cx = container.x + dx*container.width/2;
cy = container.y + dy*container.height/2;
textEl.x = cx - textEl.width/2;
textEl.y = cy - textEl.height/2;
}
if(!container) {
const width = textEl.width+2*padding;
const widthOK = width<=maxWidth;
containerID = ea.addRect(
textEl.x-padding,
textEl.y-padding,
widthOK ? width : maxWidth,
textEl.height + 2 * padding
);
container = ea.getElement(containerID);
}
boxes.push(containerID);
container.boundElements=[{type:"text",id: textId}];
textEl.containerId = containerID;
//ensuring the correct order of elements, first container, then text
delete ea.elementsDict[textEl.id];
ea.elementsDict[textEl.id] = textEl;
await ea.addElementsToView(false,false,true);
const containers = ea.getViewElements().filter(el=>boxes.includes(el.id));
if(["rectangle","diamond","ellipse"].includes(container.type)) api.updateContainerSize(containers);
ea.selectElementsInView(containers);
};
// ---------------------
// Edit Existing Element
// ---------------------
const editExistingTextElement = async (elements) => {
windowOpen = true;
ea.copyViewElementsToEAforEditing(elements);
const el = ea.getElements()[0];
ea.style.strokeColor = el.strokeColor;
const text = await utils.inputPrompt(
"Edit text","",elements[0].rawText,undefined,5,true,customControls,true
);
windowOpen = false;
if(!text) return;
el.strokeColor = ea.style.strokeColor;
el.originalText = text;
el.text = text;
el.rawText = text;
ea.refreshTextElementSize(el.id);
await ea.addElementsToView(false,false);
if(el.containerId) {
const containers = ea.getViewElements().filter(e=>e.id === el.containerId);
api.updateContainerSize(containers);
ea.selectElementsInView(containers);
}
}
//--------------
// Start actions
//--------------
if(!win.ExcalidrawScribbleHelper?.eventHandler) {
if(!silent) new Notice(
"To create a new text element,\ndouble-tap the screen.\n\n" +
"To edit text,\ndouble-tap an existing element.\n\n" +
"To stop the script,\ntap it again or switch to a different tab.",
5000
);
addEventHandler(eventHandler);
}
if(containerElements.length === 1 || selectedTextElements.length === 1) {
timer = timer - 100;
eventHandler();
}