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https://gitlab.kit.edu/uskyk/typicalc.git
synced 2024-11-08 10:20:41 +00:00
Center on last step in proof tree
This commit is contained in:
Arne Keller
parent
78bb732541
commit
db48c7ffa0
@ -129,8 +129,18 @@ class MathjaxProofTree extends MathjaxAdapter {
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}
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}
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// limit start zoom
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svg.viewBox.baseVal.width = Math.min(100000, svg.viewBox.baseVal.width);
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svg.viewBox.baseVal.width = Math.min(50000, svg.viewBox.baseVal.width);
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svg.viewBox.baseVal.width = Math.max(20000, svg.viewBox.baseVal.width);
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// center on first visible element
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const finalConclusion = svg
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.querySelector<SVGGraphicsElement>("#typicalc-prooftree > g[semantics='bspr_inferenceRule:down']")!
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.children[1]! as SVGGraphicsElement;
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const conclusionBBox = finalConclusion.getBBox();
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const mainGroupElement = svg.children[1]! as SVGGraphicsElement;
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const currentX = conclusionBBox.x + conclusionBBox.width / 2;
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const desiredX = svg.viewBox.baseVal.width / 2;
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mainGroupElement.setAttribute("transform",
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mainGroupElement.getAttribute("transform") + " translate(" + (desiredX - currentX) + " 0)");
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// MathJax layout of bussproofs is sometimes wrong:
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// https://github.com/mathjax/MathJax/issues/2270
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@ -238,126 +248,132 @@ class MathjaxProofTree extends MathjaxAdapter {
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}
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console.timeEnd('stepCalculation');
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const thisShadowRoot = this.shadowRoot!;
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// should not be used on empty SVGs
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// svg-pan-zoom should not be used on empty SVGs
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if (nodeIterator.length >= 3) {
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window.svgPanZoomFun(svg, {
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fit: false,
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controlIconsEnabled: true,
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customEventsHandler: {
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// Halt all touch events
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haltEventListeners: ['touchstart', 'touchend', 'touchmove', 'touchleave', 'touchcancel'],
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// Init custom events handler
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init: (options) => {
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const instance = options.instance;
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// Init Hammer
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// @ts-ignore
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this.hammer = Hammer(options.svgElement);
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// @ts-ignore
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this.hammer.get('pinch').set({enable: true});
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// Handle double tap
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// @ts-ignore
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this.hammer.on('doubletap', () => {
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options.instance.zoomIn()
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});
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let pannedX = 0;
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let pannedY = 0;
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// Handle pan
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// @ts-ignore
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this.hammer.on('panstart panmove', ev => {
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// On pan start reset panned variables
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if (ev.type === 'panstart') {
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pannedX = 0;
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pannedY = 0;
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this.panningSvg = true;
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}
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// Pan only the difference
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instance.panBy({x: ev.deltaX - pannedX, y: ev.deltaY - pannedY})
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pannedX = ev.deltaX
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pannedY = ev.deltaY
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// also move the tooltip
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let explainer = thisShadowRoot.getElementById(this.hoverTextElID);
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if (explainer) {
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const ctm1 = svg.getBoundingClientRect();
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const ctm2 = this.defElBackground!.getBoundingClientRect();
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explainer.style.left = (ctm2.left - ctm1.left) + "px";
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explainer.style.top = (ctm2.bottom - ctm1.top) + "px";
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// TODO(performance): this should be more efficient, but somehow flickers
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/*
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const dx = (ctm2.left - ctm1.left) - explainer.offsetLeft;
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const dy = (ctm2.bottom - ctm1.top) - explainer.offsetTop;
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explainer.style.transform = "translate(" + dx + "px," + dy + "px)";
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*/
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}
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});
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// @ts-ignore
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this.hammer.on("panend", (e) => {
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this.panningSvg = false;
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});
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let initialScale = 1;
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// Handle pinch
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// @ts-ignore
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this.hammer.on('pinchstart pinchmove', function (ev) {
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// On pinch start remember initial zoom
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if (ev.type === 'pinchstart') {
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initialScale = instance.getZoom()
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instance.zoomAtPoint(initialScale * ev.scale, {x: ev.center.x, y: ev.center.y})
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}
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instance.zoomAtPoint(initialScale * ev.scale, {x: ev.center.x, y: ev.center.y})
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});
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// Prevent moving the page on some devices when panning over SVG
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options.svgElement.addEventListener('touchmove', function (e: TouchEvent) {
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e.preventDefault();
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});
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},
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// Destroy custom events handler
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destroy: function () {
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// @ts-ignore
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this.hammer.destroy()
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}
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}
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});
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// add tooltips to buttons
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const zoomIn = document.createElementNS("http://www.w3.org/2000/svg", "title");
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zoomIn.append(document.createTextNode("zoom in"));
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svg.getElementById("svg-pan-zoom-zoom-in")!.appendChild(zoomIn);
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const zoomOut = document.createElementNS("http://www.w3.org/2000/svg", "title");
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zoomOut.append(document.createTextNode("zoom out"));
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svg.getElementById("svg-pan-zoom-zoom-out")!.appendChild(zoomOut);
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// move control to upper left corner
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let matrix = svg.getElementById("svg-pan-zoom-controls")!.transform.baseVal[0].matrix;
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matrix.e = 0;
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matrix.f = 0;
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svg.addEventListener("mousemove", (e) => {
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if (!this.hoveringOnElement || this.panningSvg) {
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return;
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}
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const x1 = e.clientX;
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const y1 = e.clientY;
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const rect = this.hoveringOnElement.getBoundingClientRect();
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const x2 = (rect.left + rect.right) / 2;
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const y2 = (rect.top + rect.bottom) / 2;
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if ((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) > (rect.width*rect.width)) { // use relative distance
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this.destroyTooltip();
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}
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});
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// a timeout is required, otherwise the proof tree is moved around
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setTimeout(() => {
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this.setupPanZoom(this.shadowRoot!, svg);
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}, 100);
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}
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this.steps = steps;
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this.showStep(0);
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}
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private setupPanZoom(thisShadowRoot: ShadowRoot, svg: SVGElement) {
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window.svgPanZoomFun(svg, {
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fit: false,
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controlIconsEnabled: true,
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customEventsHandler: {
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// Halt all touch events
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haltEventListeners: ['touchstart', 'touchend', 'touchmove', 'touchleave', 'touchcancel'],
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// Init custom events handler
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init: (options) => {
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const instance = options.instance;
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// Init Hammer
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// @ts-ignore
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this.hammer = Hammer(options.svgElement);
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// @ts-ignore
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this.hammer.get('pinch').set({enable: true});
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// Handle double tap
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// @ts-ignore
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this.hammer.on('doubletap', () => {
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options.instance.zoomIn()
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});
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let pannedX = 0;
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let pannedY = 0;
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// Handle pan
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// @ts-ignore
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this.hammer.on('panstart panmove', ev => {
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// On pan start reset panned variables
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if (ev.type === 'panstart') {
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pannedX = 0;
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pannedY = 0;
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this.panningSvg = true;
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}
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// Pan only the difference
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instance.panBy({x: ev.deltaX - pannedX, y: ev.deltaY - pannedY})
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pannedX = ev.deltaX
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pannedY = ev.deltaY
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// also move the tooltip
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let explainer = thisShadowRoot.getElementById(this.hoverTextElID);
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if (explainer) {
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const ctm1 = svg.getBoundingClientRect();
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const ctm2 = this.defElBackground!.getBoundingClientRect();
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explainer.style.left = (ctm2.left - ctm1.left) + "px";
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explainer.style.top = (ctm2.bottom - ctm1.top) + "px";
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// TODO(performance): this should be more efficient, but somehow flickers
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/*
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const dx = (ctm2.left - ctm1.left) - explainer.offsetLeft;
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const dy = (ctm2.bottom - ctm1.top) - explainer.offsetTop;
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explainer.style.transform = "translate(" + dx + "px," + dy + "px)";
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*/
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}
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});
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// @ts-ignore
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this.hammer.on("panend", (e) => {
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this.panningSvg = false;
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});
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let initialScale = 1;
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// Handle pinch
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// @ts-ignore
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this.hammer.on('pinchstart pinchmove', function (ev) {
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// On pinch start remember initial zoom
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if (ev.type === 'pinchstart') {
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initialScale = instance.getZoom()
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instance.zoomAtPoint(initialScale * ev.scale, {x: ev.center.x, y: ev.center.y})
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}
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instance.zoomAtPoint(initialScale * ev.scale, {x: ev.center.x, y: ev.center.y})
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});
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// Prevent moving the page on some devices when panning over SVG
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options.svgElement.addEventListener('touchmove', function (e: TouchEvent) {
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e.preventDefault();
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});
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},
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// Destroy custom events handler
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destroy: function () {
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// @ts-ignore
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this.hammer.destroy()
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}
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}
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});
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// add tooltips to buttons
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const zoomIn = document.createElementNS("http://www.w3.org/2000/svg", "title");
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zoomIn.append(document.createTextNode("zoom in"));
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svg.getElementById("svg-pan-zoom-zoom-in")!.appendChild(zoomIn);
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const zoomOut = document.createElementNS("http://www.w3.org/2000/svg", "title");
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zoomOut.append(document.createTextNode("zoom out"));
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svg.getElementById("svg-pan-zoom-zoom-out")!.appendChild(zoomOut);
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// move control to upper left corner
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let matrix = svg.getElementById("svg-pan-zoom-controls")!.transform.baseVal[0].matrix;
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matrix.e = 0;
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matrix.f = 0;
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// this listener destroys tooltips if the mouse is moved away from the relevant element
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svg.addEventListener("mousemove", (e) => {
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if (!this.hoveringOnElement || this.panningSvg) {
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return;
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}
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const x1 = e.clientX;
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const y1 = e.clientY;
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const rect = this.hoveringOnElement.getBoundingClientRect();
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const x2 = (rect.left + rect.right) / 2;
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const y2 = (rect.top + rect.bottom) / 2;
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if ((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) > (rect.width * rect.width)) { // use relative distance
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this.destroyTooltip();
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}
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});
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}
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protected calculateSteps(extraData: any): void {
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const data = typeof extraData === "string" ? JSON.parse(extraData) : [];
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const root = this.shadowRoot;
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