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Editing: gnuplot_svg.js
// From: Marko Karjalainen <markokarjalainen@kolumbus.fi> // Date: 27 Aug 2018 // Experimental gnuplot plugin for svg // // All svg elements on page get own gnuplot plugin attached by js, so no conflict with global variables. // // Javascript variables are read from second script tag and converted to json for import to plugin. // Inline events are removed from xml and new ones are attached with addEventListener function. // Inline events should be removed from xml and xml should have better id/class names to attach events from js. // // Improved mouseover text and image handling // content changed to xml only if it really changed and bouncing is calculated once. // // Convert functions are same as before, maybe renamed better. // // Javascript routines for mouse and keyboard interaction with // SVG documents produced by gnuplot SVG terminal driver. // TODO do not create inline events to svg and give id or classes for getting elements // TODO make own svg layer x/y range sized for coordinates? if (window) { window.addEventListener('load', function () { // Find svg elements var svg = document.querySelectorAll('svg'); for (var i = 0; i < svg.length; i++) { // Init plugin if (!svg[i].gnuplot) { // Check if gnuplot generated svg if(svg[i].getElementById('gnuplot_canvas')){ svg[i].gnuplot = new gnuplot_svg(svg[i]); } } } }); } gnuplot_svg = function (svgElement) { var version = '09 April 2019'; var settings = {}; var viewBoxResetValue = []; var drag = { 'enabled': false, 'offset': { 'x': 0, 'y': 0 }, 'change': svgElement.createSVGPoint(), 'timeout': null }; var coordinateText = { 'enabled': false, 'element': svgElement.getElementById('coord_text') }; var popoverContainer = { 'element': null, 'content': null, }; var popoverImage = { 'element': null, 'content': null, 'width': 300, 'height': 200, 'defaultWidth': 300, 'defaultHeight': 200, }; var popoverText = { 'element': null, 'content': null, 'width': 11, 'height': 16, 'defaultWidth': 11, 'defaultHeight': 16, }; var point = svgElement.createSVGPoint(); var axisDate = new Date(); var gridEnabled = false; // Get plot boundaries and axis scaling information for mousing from current object script tag // TODO add these to svg xml custom attribute for reading(json format) var parseSettings = function () { var script = svgElement.querySelectorAll('script'); if (script && script[1]) { var scriptText = script[1].firstChild.nodeValue; // Remove inline comments scriptText = scriptText.replace(/^\s*\/\/.*\n/g, ''); // Change prefix to " scriptText = scriptText.replace(/gnuplot_svg\./g, '"'); // Change = to " : scriptText = scriptText.replace(/ = /g, '" : '); // Change line endings to comma scriptText = scriptText.replace(/;\n|\n/g, ','); // Remove last comma scriptText = scriptText.replace(/,+$/, ''); // Parse as json string settings = JSON.parse("{\n" + scriptText + "\n}"); } }; // Add interactive events var addEvents = function () { var i; // Get keyentry elements var toggleVisibility = svgElement.querySelectorAll('g[id$="_keyentry"]'); for (i = 0; i < toggleVisibility.length; i++) { // ------- Remove inline events toggleVisibility[i].removeAttribute('onclick'); // ------- // Add keyentry event to toggle visibility toggleVisibility[i].addEventListener('click', key.bind(null, toggleVisibility[i].getAttribute('id'), null)); } // ------- Remove inline events from bounding box var boundingBox = svgElement.querySelector('rect[onclick^="gnuplot_svg.toggleCoordBox"]'); if (boundingBox) { boundingBox.removeAttribute('onclick'); boundingBox.removeAttribute('onmousemove'); } // ------- Remove inline events from canvas var canvas = svgElement.getElementById('gnuplot_canvas'); if (canvas) { canvas.removeAttribute('onclick'); canvas.removeAttribute('onmousemove'); } // ------- // Get grid image var toggleGrid = svgElement.querySelector('image[onclick^="gnuplot_svg.toggleGrid"]'); if (toggleGrid) { // ------- Remove inline events toggleGrid.removeAttribute('onclick'); // ------- // Add Toggle grid image event toggleGrid.addEventListener('click', function (evt) { grid(); evt.preventDefault(); evt.stopPropagation(); }); } // Get hypertexts var hyperText = svgElement.querySelectorAll('g[onmousemove^="gnuplot_svg.showHypertext"]'); // Set view element variables if (hyperText.length) { popoverContainer.element = svgElement.getElementById('hypertextbox'); popoverText.element = svgElement.getElementById('hypertext'); popoverImage.element = svgElement.getElementById('hyperimage'); popoverImage.defaultWidth = popoverImage.element.getAttribute('width'); popoverImage.defaultHeight = popoverImage.element.getAttribute('height'); } for (i = 0; i < hyperText.length; i++) { // Get text from attr uggly way, svg has empty title element var text = hyperText[i].getAttribute('onmousemove').substr(31).slice(0, -2); // ------- Remove inline events hyperText[i].removeAttribute('onmousemove'); hyperText[i].removeAttribute('onmouseout'); // ------- // Add event hyperText[i].addEventListener('mousemove', popover.bind(null, text, true)); hyperText[i].addEventListener('mouseout', popover.bind(null, null, false)); } // Toggle coordinates visibility on left click on boundingBox element svgElement.addEventListener('click', function (evt) { if (!drag.enabled) { // TODO check if inside data area, own layer for this is needed? coordinate(); setCoordinateLabel(evt); } }); // Save move start position, enable drag after delay svgElement.addEventListener('mousedown', function (evt) { drag.offset = { 'x': evt.clientX, 'y': evt.clientY }; // Delay for moving, so not move accidentally if only click drag.timeout = setTimeout(function () { drag.enabled = true; }, 250); // Cancel draggable evt.stopPropagation(); evt.preventDefault(); return false; }); // Disable drag svgElement.addEventListener('mouseup', function (evt) { drag.enabled = false; clearTimeout(drag.timeout); }); // Mouse move svgElement.addEventListener('mousemove', function (evt) { // Drag svg element if (evt.buttons == 1 && drag.enabled) { // Position change drag.change.x = evt.clientX - drag.offset.x; drag.change.y = evt.clientY - drag.offset.y; // Set current mouse position drag.offset.x = evt.clientX; drag.offset.y = evt.clientY; // Convert to svg position drag.change.matrixTransform(svgElement.getScreenCTM().inverse()); var viewBoxValues = getViewBox(); viewBoxValues[0] -= drag.change.x; viewBoxValues[1] -= drag.change.y; setViewBox(viewBoxValues); } // View coordinates on mousemove over svg element if (coordinateText.enabled) { // TODO check if inside data area, own layer for this is needed? setCoordinateLabel(evt); } }); // Zoom with wheel svgElement.addEventListener('wheel', function (evt) { // x or y scroll zoom both axels var delta = Math.max(-1, Math.min(1, (evt.deltaY || evt.deltaX))); if (delta > 0) { setViewBox(zoom('in')); } else { setViewBox(zoom('out')); } // Disable scroll the entire webpage evt.stopPropagation(); evt.preventDefault(); return false; }); // Reset on right click or hold tap svgElement.addEventListener('contextmenu', function (evt) { setViewBox(viewBoxResetValue); // Disable native context menu evt.stopPropagation(); evt.preventDefault(); return false; }); // Keyboard actions, old svg version not support key events so must listen window window.addEventListener('keydown', function (evt) { // Not capture event from inputs // body = svg inline in page, svg = plain svg file, window = delegated events to object if (evt.target.nodeName != 'BODY' && evt.target.nodeName != 'svg' && evt.target != window) { return true; } var viewBoxValues = []; switch (evt.key) { // Move, Edge sends without Arrow word case 'ArrowLeft': case 'Left': case 'ArrowRight': case 'Right': case 'ArrowUp': case 'Up': case 'ArrowDown': case 'Down': viewBoxValues = pan(evt.key.replace('Arrow', '').toLowerCase()); break; // Zoom in case '+': case 'Add': viewBoxValues = zoom('in'); break; // Zoom out case '-': case 'Subtract': viewBoxValues = zoom('out'); break; // Reset case 'Home': viewBoxValues = viewBoxResetValue; break; // Toggle grid case '#': grid(); break; } if (viewBoxValues.length) { setViewBox(viewBoxValues); } }); }; // Get svg viewbox details var getViewBox = function () { var viewBoxValues = svgElement.getAttribute('viewBox').split(' '); viewBoxValues[0] = parseFloat(viewBoxValues[0]); viewBoxValues[1] = parseFloat(viewBoxValues[1]); viewBoxValues[2] = parseFloat(viewBoxValues[2]); viewBoxValues[3] = parseFloat(viewBoxValues[3]); return viewBoxValues; }; // Set svg viewbox details var setViewBox = function (viewBoxValues) { svgElement.setAttribute('viewBox', viewBoxValues.join(' ')); }; // Set coordinate label position and text var setCoordinateLabel = function (evt) { var position = convertDOMToSVG({ 'x': evt.clientX, 'y': evt.clientY }); // Set coordinate label position coordinateText.element.setAttribute('x', position.x); coordinateText.element.setAttribute('y', position.y); // Convert svg position to plot coordinates var plotcoord = convertSVGToPlot(position); // Parse label to view var label = parseCoordinateLabel(plotcoord); // Set coordinate label text coordinateText.element.textContent = label.x + ' ' + label.y; }; // Convert position DOM to SVG var convertDOMToSVG = function (position) { point.x = position.x; point.y = position.y; return point.matrixTransform(svgElement.getScreenCTM().inverse()); }; // Convert position SVG to Plot var convertSVGToPlot = function (position) { var plotcoord = {}; var plotx = position.x - settings.plot_xmin; var ploty = position.y - settings.plot_ybot; var x, y; if (settings.plot_logaxis_x !== 0) { x = Math.log(settings.plot_axis_xmax) - Math.log(settings.plot_axis_xmin); x = x * (plotx / (settings.plot_xmax - settings.plot_xmin)) + Math.log(settings.plot_axis_xmin); x = Math.exp(x); } else { x = settings.plot_axis_xmin + (plotx / (settings.plot_xmax - settings.plot_xmin)) * (settings.plot_axis_xmax - settings.plot_axis_xmin); } if (settings.plot_logaxis_y !== 0) { y = Math.log(settings.plot_axis_ymax) - Math.log(settings.plot_axis_ymin); y = y * (ploty / (settings.plot_ytop - settings.plot_ybot)) + Math.log(settings.plot_axis_ymin); y = Math.exp(y); } else { y = settings.plot_axis_ymin + (ploty / (settings.plot_ytop - settings.plot_ybot)) * (settings.plot_axis_ymax - settings.plot_axis_ymin); } plotcoord.x = x; plotcoord.y = y; return plotcoord; }; // Parse plot x/y values to label var parseCoordinateLabel = function (plotcoord) { var label = { 'x': 0, 'y': 0 }; if (settings.plot_timeaxis_x == 'DMS' || settings.plot_timeaxis_y == 'DMS') { if (settings.plot_timeaxis_x == 'DMS') { label.x = convertToDMS(plotcoord.x); } else { label.x = plotcoord.x.toFixed(2); } if (settings.plot_timeaxis_y == 'DMS') { label.y = convertToDMS(plotcoord.y); } else { label.y = plotcoord.y.toFixed(2); } } else if (settings.polar_mode) { polar = convertToPolar(plotcoord.x, plotcoord.y); label.x = 'ang= ' + polar.ang.toPrecision(4); label.y = 'R= ' + polar.r.toPrecision(4); } else if (settings.plot_timeaxis_x == 'Date') { axisDate.setTime(1000 * plotcoord.x); var year = axisDate.getUTCFullYear(); var month = axisDate.getUTCMonth(); var date = axisDate.getUTCDate(); label.x = (' ' + date).slice(-2) + '/' + ('0' + (month + 1)).slice(-2) + '/' + year; label.y = plotcoord.y.toFixed(2); } else if (settings.plot_timeaxis_x == 'Time') { axisDate.setTime(1000 * plotcoord.x); var hour = axisDate.getUTCHours(); var minute = axisDate.getUTCMinutes(); var second = axisDate.getUTCSeconds(); label.x = ('0' + hour).slice(-2) + ':' + ('0' + minute).slice(-2) + ':' + ('0' + second).slice(-2); label.y = plotcoord.y.toFixed(2); } else if (settings.plot_timeaxis_x == 'DateTime') { axisDate.setTime(1000 * plotcoord.x); label.x = axisDate.toUTCString(); label.y = plotcoord.y.toFixed(2); } else { label.x = plotcoord.x.toFixed(2); label.y = plotcoord.y.toFixed(2); } return label; }; // Convert position to Polar var convertToPolar = function (x, y) { polar = {}; var phi, r; phi = Math.atan2(y, x); if (settings.plot_logaxis_r) { r = Math.exp((x / Math.cos(phi) + Math.log(settings.plot_axis_rmin) / Math.LN10) * Math.LN10); } else if (settings.plot_axis_rmin > settings.plot_axis_rmax) { r = settings.plot_axis_rmin - x / Math.cos(phi); } else { r = settings.plot_axis_rmin + x / Math.cos(phi); } phi = phi * (180 / Math.PI); if (settings.polar_sense < 0) { phi = -phi; } if (settings.polar_theta0 !== undefined) { phi = phi + settings.polar_theta0; } if (phi > 180) { phi = phi - 360; } polar.r = r; polar.ang = phi; return polar; }; // Convert position to DMS var convertToDMS = function (x) { var dms = { d: 0, m: 0, s: 0 }; var deg = Math.abs(x); dms.d = Math.floor(deg); dms.m = Math.floor((deg - dms.d) * 60); dms.s = Math.floor((deg - dms.d) * 3600 - dms.m * 60); fmt = ((x < 0) ? '-' : ' ') + dms.d.toFixed(0) + '°' + dms.m.toFixed(0) + '"' + dms.s.toFixed(0) + "'"; return fmt; }; // Set popover text to show var setPopoverText = function (content) { // Minimum length popoverText.width = popoverText.defaultWidth; // Remove old texts while (null !== popoverText.element.firstChild) { popoverText.element.removeChild(popoverText.element.firstChild); } var lines = content.split(/\n|\\n/g); // Single line if (lines.length <= 1) { popoverText.element.textContent = content; popoverText.width = popoverText.element.getComputedTextLength() + 8; } // Multiple lines else { var lineWidth = 0; var tspanElement; for (var l = 0; l < lines.length; l++) { tspanElement = document.createElementNS('http://www.w3.org/2000/svg', 'tspan'); // Y relative position if (l > 0) { tspanElement.setAttribute('dy', popoverText.defaultHeight); } // Append text tspanElement.appendChild(document.createTextNode(lines[l])); popoverText.element.appendChild(tspanElement); // Max line width lineWidth = tspanElement.getComputedTextLength() + 8; if (popoverText.width < lineWidth) { popoverText.width = lineWidth; } } } // Box Height popoverText.height = 2 + popoverText.defaultHeight * lines.length; popoverContainer.element.setAttribute('height', popoverText.height); // Box Width popoverContainer.element.setAttribute('width', popoverText.width); }; // Set popover image to show var setPopoverImage = function (content) { // Set default image size popoverImage.width = popoverImage.defaultWidth; popoverImage.height = popoverImage.defaultHeight; // Pick up height and width from image(width,height):name if (content.charAt(5) == '(') { popoverImage.width = parseInt(content.slice(6)); popoverImage.height = parseInt(content.slice(content.indexOf(',') + 1)); } popoverImage.element.setAttribute('width', popoverImage.width); popoverImage.element.setAttribute('height', popoverImage.height); popoverImage.element.setAttribute('preserveAspectRatio', 'none'); // attach image URL as a link content = content.slice(content.indexOf(':') + 1); popoverImage.element.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', content); }; // Show popover text in given position var showPopoverText = function (position) { var domRect = svgElement.getBoundingClientRect(); domRect = convertDOMToSVG({'x': domRect.right, 'y': domRect.bottom }); // bounce off frame bottom if (position.y + popoverText.height + 16 > domRect.y) { position.y = domRect.y - popoverText.height - 16; } // bounce off right edge if (position.x + popoverText.width + 14 > domRect.x) { position.x = domRect.x - popoverText.width - 14; } // Change Box position popoverContainer.element.setAttribute('x', position.x + 10); popoverContainer.element.setAttribute('y', position.y + 4); popoverContainer.element.setAttribute('visibility', 'visible'); // Change Text position popoverText.element.setAttribute('x', position.x + 14); popoverText.element.setAttribute('y', position.y + 18); popoverText.element.setAttribute('visibility', 'visible'); // Change multiline text position var tspan = popoverText.element.querySelectorAll('tspan'); for (var i = 0; i < tspan.length; i++) { tspan[i].setAttribute('x', position.x + 14); } // Font properties if (settings.hypertext_fontFamily != null) popoverText.element.setAttribute('font-family', settings.hypertext_fontFamily); if (settings.hypertext_fontStyle != null) popoverText.element.setAttribute('font-style', settings.hypertext_fontStyle); if (settings.hypertext_fontWeight != null) popoverText.element.setAttribute('font-weight', settings.hypertext_fontWeight); if (settings.hypertext_fontSize > 0) popoverText.element.setAttribute('font-size', settings.hypertext_fontSize); }; // Show popover image in given position var showPopoverImage = function (position) { var domRect = svgElement.getBoundingClientRect(); domRect = convertDOMToSVG({'x': domRect.right, 'y': domRect.bottom }); // bounce off frame bottom if (position.y + popoverImage.height + 16 > domRect.y) { position.y = domRect.y - popoverImage.height - 16; } // bounce off right edge if (position.x + popoverImage.width + 14 > domRect.x) { position.x = domRect.x - popoverImage.width - 14; } popoverImage.element.setAttribute('x', position.x); popoverImage.element.setAttribute('y', position.y); popoverImage.element.setAttribute('visibility', 'visible'); }; // Hide all popovers var hidePopover = function () { popoverContainer.element.setAttribute('visibility', 'hidden'); popoverText.element.setAttribute('visibility', 'hidden'); popoverImage.element.setAttribute('visibility', 'hidden'); }; // Zoom svg inside viewbox var zoom = function (direction) { var zoomRate = 1.1; var viewBoxValues = getViewBox(); var widthBefore = viewBoxValues[2]; var heightBefore = viewBoxValues[3]; if (direction == 'in') { viewBoxValues[2] /= zoomRate; viewBoxValues[3] /= zoomRate; // Pan to center viewBoxValues[0] -= (viewBoxValues[2] - widthBefore) / 2; viewBoxValues[1] -= (viewBoxValues[3] - heightBefore) / 2; } else if (direction == 'out') { viewBoxValues[2] *= zoomRate; viewBoxValues[3] *= zoomRate; // Pan to center viewBoxValues[0] += (widthBefore - viewBoxValues[2]) / 2; viewBoxValues[1] += (heightBefore - viewBoxValues[3]) / 2; } return viewBoxValues; }; // Pan svg inside viewbox var pan = function (direction) { var panRate = 10; var viewBoxValues = getViewBox(); switch (direction) { case 'left': viewBoxValues[0] += panRate; break; case 'right': viewBoxValues[0] -= panRate; break; case 'up': viewBoxValues[1] += panRate; break; case 'down': viewBoxValues[1] -= panRate; break; } return viewBoxValues; }; // Toggle key and chart on/off or set manually to wanted var key = function (id, set, evt) { var visibility = null; // Chart element var chartElement = svgElement.getElementById(id.replace('_keyentry', '')); if (chartElement) { // Set on/off if (set === true || set === false) { visibility = set ? 'visible' : 'hidden'; } // Toggle else { visibility = chartElement.getAttribute('visibility') == 'hidden' ? 'visible' : 'hidden'; } chartElement.setAttribute('visibility', visibility); } // Key element var keyElement = svgElement.getElementById(id); if (keyElement && visibility) { keyElement.setAttribute('style', visibility == 'hidden' ? 'filter:url(#greybox)' : 'none'); } if (evt !== undefined) { evt.stopPropagation(); evt.preventDefault(); } }; // Toggle coordinates on/off or set manually to wanted var coordinate = function (set) { if (coordinateText.element) { // Set on/off if (set === true || set === false) { coordinateText.enabled = set; } // Toggle else { coordinateText.enabled = coordinateText.element.getAttribute('visibility') == 'hidden' ? true : false; } coordinateText.element.setAttribute('visibility', coordinateText.enabled ? 'visible' : 'hidden'); } }; // Toggle grid on/off or set manually to wanted var grid = function (set) { var grid = svgElement.getElementsByClassName('gridline'); // Set on/off if (set === true || set === false) { gridEnabled = set; } // Toggle, get state from first element else if (grid.length) { gridEnabled = grid[0].getAttribute('visibility') == 'hidden' ? true : false; } for (i = 0; i < grid.length; i++) { grid[i].setAttribute('visibility', gridEnabled ? 'visible' : 'hidden'); } }; // Show popover text or image var popover = function (content, set, evt) { // Hide popover if (set === false) { hidePopover(); if (evt !== undefined) { evt.stopPropagation(); evt.preventDefault(); } return; } var position = null; // Change content only if changed if (popoverContainer.content != content) { // Set current text popoverContainer.content = content; popoverImage.content = ''; popoverText.content = content; // If text starts with image: process it as an xlinked bitmap if (content.substring(0, 5) == 'image') { var lines = content.split(/\n|\\n/g); var nameindex = lines[0].indexOf(':'); if (nameindex > 0) { popoverImage.content = lines.shift(); popoverText.content = ''; // Additional text lines if (lines !== undefined && lines.length > 0) { popoverText.content = lines.join('\n'); } } } // Set image content if(popoverImage.content){ setPopoverImage(popoverImage.content); } // Set text content if(popoverText.content){ setPopoverText(popoverText.content); } } if(popoverImage.content || popoverText.content){ position = convertDOMToSVG({'x': evt.clientX, 'y': evt.clientY }); } // Show popover image on mouse position if(popoverImage.content){ showPopoverImage(position); } // Show popover on mouse position if(popoverText.content){ showPopoverText(position); } if (evt !== undefined) { evt.stopPropagation(); evt.preventDefault(); } }; // Parse plot settings parseSettings(); // viewBox initial position and size viewBoxResetValue = getViewBox(); // Set focusable for event focusing, not work on old svg version svgElement.setAttribute('focusable', true); // Disable native draggable svgElement.setAttribute('draggable', false); // Add events addEvents(); // Return functions to outside use return { zoom: function (direction) { setViewBox(zoom(direction)); return this; }, pan: function (direction) { setViewBox(pan(direction)); return this; }, reset: function () { setViewBox(viewBoxResetValue); return this; }, key: function (id, set) { key(id, set); return this; }, coordinate: function (set) { coordinate(set); return this; }, grid: function (set) { grid(set); return this; } }; }; // Old init function, remove when svg inline events removed gnuplot_svg.Init = function() { };
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