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<h1 class="page-title">Source: svgcanvas/selection.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* Tools for selection.
* @module selection
* @license MIT
* @copyright 2011 Jeff Schiller
*/
import { NS } from './namespaces.js';
import {
isNullish, getBBox as utilsGetBBox, getStrokedBBoxDefaultVisible
} from './utilities.js';
import { transformPoint, transformListToTransform, rectsIntersect } from './math.js';
import * as hstry from './history.js';
import { getClosest } from '../editor/components/jgraduate/Util.js';
const { BatchCommand } = hstry;
let selectionContext_ = null;
let svgCanvas = null;
let selectedElements;
/**
* @function module:selection.init
* @param {module:selection.selectionContext} selectionContext
* @returns {void}
*/
export const init = function (selectionContext) {
selectionContext_ = selectionContext;
svgCanvas = selectionContext_.getCanvas();
selectedElements = selectionContext_.getSelectedElements;
};
/**
* Clears the selection. The 'selected' handler is then optionally called.
* This should really be an intersection applying to all types rather than a union.
* @name module:selection.SvgCanvas#clearSelection
* @type {module:draw.DrawCanvasInit#clearSelection|module:path.EditorContext#clearSelection}
* @fires module:selection.SvgCanvas#event:selected
*/
export const clearSelectionMethod = function (noCall) {
selectedElements().forEach((elem) => {
if (isNullish(elem)) {
return;
}
svgCanvas.selectorManager.releaseSelector(elem);
});
svgCanvas.setEmptySelectedElements();
if (!noCall) { svgCanvas.call('selected', selectedElements()); }
};
/**
* Adds a list of elements to the selection. The 'selected' handler is then called.
* @name module:selection.SvgCanvas#addToSelection
* @type {module:path.EditorContext#addToSelection}
* @fires module:selection.SvgCanvas#event:selected
*/
export const addToSelectionMethod = function (elemsToAdd, showGrips) {
if (!elemsToAdd.length) { return; }
// find the first null in our selectedElements array
let j = 0;
while (j < selectedElements().length) {
if (isNullish(selectedElements()[j])) {
break;
}
++j;
}
// now add each element consecutively
let i = elemsToAdd.length;
while (i--) {
let elem = elemsToAdd[i];
if (!elem) { continue; }
const bbox = utilsGetBBox(elem);
if (!bbox) { continue; }
if (elem.tagName === 'a' && elem.childNodes.length === 1) {
// Make "a" element's child be the selected element
elem = elem.firstChild;
}
// if it's not already there, add it
if (!selectedElements().includes(elem)) {
selectedElements()[j] = elem;
// only the first selectedBBoxes element is ever used in the codebase these days
// if (j === 0) selectedBBoxes[0] = utilsGetBBox(elem);
j++;
const sel = svgCanvas.selectorManager.requestSelector(elem, bbox);
if (selectedElements().length > 1) {
sel.showGrips(false);
}
}
}
if (!selectedElements().length) {
return;
}
svgCanvas.call('selected', selectedElements());
if (selectedElements().length === 1) {
svgCanvas.selectorManager.requestSelector(selectedElements()[0]).showGrips(showGrips);
}
// make sure the elements are in the correct order
// See: https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-compareDocumentPosition
selectedElements().sort(function (a, b) {
if (a && b && a.compareDocumentPosition) {
return 3 - (b.compareDocumentPosition(a) & 6); // eslint-disable-line no-bitwise
}
if (isNullish(a)) {
return 1;
}
return 0;
});
// Make sure first elements are not null
while (isNullish(selectedElements())[0]) {
selectedElements().shift(0);
}
};
/**
* @name module:svgcanvas.SvgCanvas#getMouseTarget
* @type {module:path.EditorContext#getMouseTarget}
*/
export const getMouseTargetMethod = function (evt) {
if (isNullish(evt)) {
return null;
}
let mouseTarget = evt.target;
// if it was a <use>, Opera and WebKit return the SVGElementInstance
if (mouseTarget.correspondingUseElement) { mouseTarget = mouseTarget.correspondingUseElement; }
// for foreign content, go up until we find the foreignObject
// WebKit browsers set the mouse target to the svgcanvas div
if ([ NS.MATH, NS.HTML ].includes(mouseTarget.namespaceURI) &&
mouseTarget.id !== 'svgcanvas'
) {
while (mouseTarget.nodeName !== 'foreignObject') {
mouseTarget = mouseTarget.parentNode;
if (!mouseTarget) { return selectionContext_.getSVGRoot(); }
}
}
// Get the desired mouseTarget with jQuery selector-fu
// If it's root-like, select the root
const currentLayer = svgCanvas.getCurrentDrawing().getCurrentLayer();
const svgRoot = selectionContext_.getSVGRoot();
const container = selectionContext_.getDOMContainer();
const content = selectionContext_.getSVGContent();
if ([ svgRoot, container, content, currentLayer ].includes(mouseTarget)) {
return selectionContext_.getSVGRoot();
}
// If it's a selection grip, return the grip parent
if (getClosest(mouseTarget.parentNode, '#selectorParentGroup')) {
// While we could instead have just returned mouseTarget,
// this makes it easier to indentify as being a selector grip
return svgCanvas.selectorManager.selectorParentGroup;
}
while (!mouseTarget?.parentNode?.isSameNode(selectionContext_.getCurrentGroup() || currentLayer)) {
mouseTarget = mouseTarget.parentNode;
}
return mouseTarget;
};
/**
* @typedef {module:svgcanvas.ExtensionMouseDownStatus|module:svgcanvas.ExtensionMouseUpStatus|module:svgcanvas.ExtensionIDsUpdatedStatus|module:locale.ExtensionLocaleData[]|void} module:svgcanvas.ExtensionStatus
* @tutorial ExtensionDocs
*/
/**
* @callback module:svgcanvas.ExtensionVarBuilder
* @param {string} name The name of the extension
* @returns {module:svgcanvas.SvgCanvas#event:ext_addLangData}
*/
/**
* @callback module:svgcanvas.ExtensionNameFilter
* @param {string} name
* @returns {boolean}
*/
/* eslint-disable max-len */
/**
* @todo Consider: Should this return an array by default, so extension results aren't overwritten?
* @todo Would be easier to document if passing in object with key of action and vars as value; could then define an interface which tied both together
* @function module:svgcanvas.SvgCanvas#runExtensions
* @param {"mouseDown"|"mouseMove"|"mouseUp"|"zoomChanged"|"IDsUpdated"|"canvasUpdated"|"toolButtonStateUpdate"|"selectedChanged"|"elementTransition"|"elementChanged"|"langReady"|"langChanged"|"addLangData"|"onNewDocument"|"workareaResized"} action
* @param {module:svgcanvas.SvgCanvas#event:ext_mouseDown|module:svgcanvas.SvgCanvas#event:ext_mouseMove|module:svgcanvas.SvgCanvas#event:ext_mouseUp|module:svgcanvas.SvgCanvas#event:ext_zoomChanged|module:svgcanvas.SvgCanvas#event:ext_IDsUpdated|module:svgcanvas.SvgCanvas#event:ext_canvasUpdated|module:svgcanvas.SvgCanvas#event:ext_toolButtonStateUpdate|module:svgcanvas.SvgCanvas#event:ext_selectedChanged|module:svgcanvas.SvgCanvas#event:ext_elementTransition|module:svgcanvas.SvgCanvas#event:ext_elementChanged|module:svgcanvas.SvgCanvas#event:ext_langReady|module:svgcanvas.SvgCanvas#event:ext_langChanged|module:svgcanvas.SvgCanvas#event:ext_addLangData|module:svgcanvas.SvgCanvas#event:ext_onNewDocument|module:svgcanvas.SvgCanvas#event:ext_workareaResized|module:svgcanvas.ExtensionVarBuilder} [vars]
* @param {boolean} [returnArray]
* @param {module:svgcanvas.ExtensionNameFilter} nameFilter
* @returns {GenericArray<module:svgcanvas.ExtensionStatus>|module:svgcanvas.ExtensionStatus|false} See {@tutorial ExtensionDocs} on the ExtensionStatus.
*/
/* eslint-enable max-len */
export const runExtensionsMethod = function (action, vars, returnArray, nameFilter) {
let result = returnArray ? [] : false;
for (const [ name, ext ] of Object.entries(selectionContext_.getExtensions())) {
if (nameFilter && !nameFilter(name)) {
return;
}
if (ext && action in ext) {
if (typeof vars === 'function') {
vars = vars(name); // ext, action
}
if (returnArray) {
result.push(ext[action](vars));
} else {
result = ext[action](vars);
}
}
}
return result;
};
/**
* Get all elements that have a BBox (excludes `<defs>`, `<title>`, etc).
* Note that 0-opacity, off-screen etc elements are still considered "visible"
* for this function.
* @function module:svgcanvas.SvgCanvas#getVisibleElementsAndBBoxes
* @param {Element} parent - The parent DOM element to search within
* @returns {ElementAndBBox[]} An array with objects that include:
*/
export const getVisibleElementsAndBBoxes = function (parent) {
if (!parent) {
const svgcontent = selectionContext_.getSVGContent();
parent = svgcontent.children; // Prevent layers from being included
}
const contentElems = [];
const elements = parent.children;
Array.prototype.forEach.call(elements, function (elem) {
if (elem.getBBox) {
contentElems.push({ elem, bbox: getStrokedBBoxDefaultVisible([ elem ]) });
}
});
return contentElems.reverse();
};
/**
* This method sends back an array or a NodeList full of elements that
* intersect the multi-select rubber-band-box on the currentLayer only.
*
* We brute-force `getIntersectionList` for browsers that do not support it (Firefox).
*
* Reference:
* Firefox does not implement `getIntersectionList()`, see {@link https://bugzilla.mozilla.org/show_bug.cgi?id=501421}.
* @function module:svgcanvas.SvgCanvas#getIntersectionList
* @param {SVGRect} rect
* @returns {Element[]|NodeList} Bbox elements
*/
export const getIntersectionListMethod = function (rect) {
const currentZoom = selectionContext_.getCurrentZoom();
if (isNullish(selectionContext_.getRubberBox())) { return null; }
const parent = selectionContext_.getCurrentGroup() || svgCanvas.getCurrentDrawing().getCurrentLayer();
let rubberBBox;
if (!rect) {
rubberBBox = selectionContext_.getRubberBox().getBBox();
const bb = selectionContext_.getSVGContent().createSVGRect();
[ 'x', 'y', 'width', 'height', 'top', 'right', 'bottom', 'left' ].forEach((o) => {
bb[o] = rubberBBox[o] / currentZoom;
});
rubberBBox = bb;
} else {
rubberBBox = selectionContext_.getSVGContent().createSVGRect();
rubberBBox.x = rect.x;
rubberBBox.y = rect.y;
rubberBBox.width = rect.width;
rubberBBox.height = rect.height;
}
let resultList = null;
if (isNullish(resultList) || typeof resultList.item !== 'function') {
resultList = [];
if (!selectionContext_.getCurBBoxes().length) {
// Cache all bboxes
selectionContext_.setCurBBoxes(getVisibleElementsAndBBoxes(parent));
}
let i = selectionContext_.getCurBBoxes().length;
while (i--) {
const curBBoxes = selectionContext_.getCurBBoxes();
if (!rubberBBox.width) { continue; }
if (rectsIntersect(rubberBBox, curBBoxes[i].bbox)) {
resultList.push(curBBoxes[i].elem);
}
}
}
// addToSelection expects an array, but it's ok to pass a NodeList
// because using square-bracket notation is allowed:
// https://www.w3.org/TR/DOM-Level-2-Core/ecma-script-binding.html
return resultList;
};
/**
* @typedef {PlainObject} ElementAndBBox
* @property {Element} elem - The element
* @property {module:utilities.BBoxObject} bbox - The element's BBox as retrieved from `getStrokedBBoxDefaultVisible`
*/
/**
* Wrap an SVG element into a group element, mark the group as 'gsvg'.
* @function module:svgcanvas.SvgCanvas#groupSvgElem
* @param {Element} elem - SVG element to wrap
* @returns {void}
*/
export const groupSvgElem = function (elem) {
const dataStorage = selectionContext_.getDataStorage();
const g = document.createElementNS(NS.SVG, 'g');
elem.replaceWith(g);
g.appendChild(elem);
dataStorage.put(g, 'gsvg', elem);
g.id = svgCanvas.getNextId();
};
/**
* Runs the SVG Document through the sanitizer and then updates its paths.
* @function module:svgcanvas.SvgCanvas#prepareSvg
* @param {XMLDocument} newDoc - The SVG DOM document
* @returns {void}
*/
export const prepareSvg = function (newDoc) {
svgCanvas.sanitizeSvg(newDoc.documentElement);
// convert paths into absolute commands
const paths = [ ...newDoc.getElementsByTagNameNS(NS.SVG, 'path') ];
paths.forEach((path) => {
const convertedPath = svgCanvas.pathActions.convertPath(path);
path.setAttribute('d', convertedPath);
svgCanvas.pathActions.fixEnd(path);
});
};
/**
* Removes any old rotations if present, prepends a new rotation at the
* transformed center.
* @function module:svgcanvas.SvgCanvas#setRotationAngle
* @param {string|Float} val - The new rotation angle in degrees
* @param {boolean} preventUndo - Indicates whether the action should be undoable or not
* @fires module:svgcanvas.SvgCanvas#event:changed
* @returns {void}
*/
export const setRotationAngle = function (val, preventUndo) {
// ensure val is the proper type
val = Number.parseFloat(val);
const elem = selectedElements()[0];
const oldTransform = elem.getAttribute('transform');
const bbox = utilsGetBBox(elem);
const cx = bbox.x + bbox.width / 2; const cy = bbox.y + bbox.height / 2;
const tlist = elem.transform.baseVal;
// only remove the real rotational transform if present (i.e. at index=0)
if (tlist.numberOfItems > 0) {
const xform = tlist.getItem(0);
if (xform.type === 4) {
tlist.removeItem(0);
}
}
// find Rnc and insert it
if (val !== 0) {
const center = transformPoint(cx, cy, transformListToTransform(tlist).matrix);
const Rnc = selectionContext_.getSVGRoot().createSVGTransform();
Rnc.setRotate(val, center.x, center.y);
if (tlist.numberOfItems) {
tlist.insertItemBefore(Rnc, 0);
} else {
tlist.appendItem(Rnc);
}
} else if (tlist.numberOfItems === 0) {
elem.removeAttribute('transform');
}
if (!preventUndo) {
// we need to undo it, then redo it so it can be undo-able! :)
// TODO: figure out how to make changes to transform list undo-able cross-browser?
const newTransform = elem.getAttribute('transform');
if (oldTransform) {
elem.setAttribute('transform', oldTransform);
} else {
elem.removeAttribute('transform');
}
svgCanvas.changeSelectedAttribute('transform', newTransform, selectedElements());
svgCanvas.call('changed', selectedElements());
}
// const pointGripContainer = getElem('pathpointgrip_container');
// if (elem.nodeName === 'path' && pointGripContainer) {
// pathActions.setPointContainerTransform(elem.getAttribute('transform'));
// }
const selector = svgCanvas.selectorManager.requestSelector(selectedElements()[0]);
selector.resize();
selectionContext_.getSelector().updateGripCursors(val);
};
/**
* Runs `recalculateDimensions` on the selected elements,
* adding the changes to a single batch command.
* @function module:svgcanvas.SvgCanvas#recalculateAllSelectedDimensions
* @fires module:svgcanvas.SvgCanvas#event:changed
* @returns {void}
*/
export const recalculateAllSelectedDimensions = function () {
const text = (selectionContext_.getCurrentResizeMode() === 'none' ? 'position' : 'size');
const batchCmd = new BatchCommand(text);
let i = selectedElements().length;
while (i--) {
const elem = selectedElements()[i];
const cmd = svgCanvas.recalculateDimensions(elem);
if (cmd) {
batchCmd.addSubCommand(cmd);
}
}
if (!batchCmd.isEmpty()) {
selectionContext_.addCommandToHistory(batchCmd);
svgCanvas.call('changed', selectedElements());
}
};
</code></pre>
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href="module-svgcanvas.SvgCanvas.html#event:event:ext_addLangData">ext_addLangData</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_callback">ext_callback</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_canvasUpdated">ext_canvasUpdated</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_elementChanged">ext_elementChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_elementTransition">ext_elementTransition</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_IDsUpdated">ext_IDsUpdated</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_langChanged">ext_langChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_langReady">ext_langReady</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseDown">ext_mouseDown</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseMove">ext_mouseMove</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_mouseUp">ext_mouseUp</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_onNewDocument">ext_onNewDocument</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_selectedChanged">ext_selectedChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_toolButtonStateUpdate">ext_toolButtonStateUpdate</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_workareaResized">ext_workareaResized</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:ext_zoomChanged">ext_zoomChanged</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:extension_added">extension_added</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:extensions_added">extensions_added</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:GenericCanvasEvent">GenericCanvasEvent</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:message">message</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:pointsAdded">pointsAdded</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:saved">saved</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:selected">selected</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:setnonce">setnonce</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:transition">transition</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:unsetnonce">unsetnonce</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:updateCanvas">updateCanvas</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:zoomDone">zoomDone</a></li><li><a href="module-svgcanvas.SvgCanvas.html#event:event:zoomed">zoomed</a></li><li><a href="module-SVGEditor.html#event:event:svgEditorReadyEvent">svgEditorReadyEvent</a></li></ul><h3>Tutorials</h3><ul><li><a href="tutorial-CanvasAPI.html">CanvasAPI</a></li><li><a href="tutorial-Editor.html">Editor</a></li><li><a href="tutorial-EditorAPI.html">EditorAPI</a></li><li><a href="tutorial-Events.html">Events</a></li><li><a href="tutorial-FrequentlyAskedQuestions.html">Frequently Asked Questions (FAQ)</a></li></ul><h3>Global</h3><ul><li><a href="global.html#attributeChangedCallback">attributeChangedCallback</a></li><li><a href="global.html#connectedCallback">connectedCallback</a></li><li><a href="global.html#constructor">constructor</a></li><li><a href="global.html#expireCookie">expireCookie</a></li><li><a href="global.html#findPos">findPos</a></li><li><a href="global.html#formatValueFormatthenumericvalueasastring.Thisisusedafterincrementing/decrementingthevaluetoreformatthevalueasastring.">formatValue
Format the numeric value as a string.
This is used after incrementing/decrementing the value to reformat the
value as a string.</a></li><li><a href="global.html#get">get</a></li><li><a href="global.html#getClosest">getClosest</a></li><li><a href="global.html#getParents">getParents</a></li><li><a href="global.html#init">init</a></li><li><a href="global.html#inputsize">inputsize</a></li><li><a href="global.html#isNullish">isNullish</a></li><li><a href="global.html#loadloadConfig">load load Config</a></li><li><a href="global.html#loadFromURLLoadconfig/datafromURLifgiven">loadFromURL Load config/data from URL if given</a></li><li><a href="global.html#name">name</a></li><li><a href="global.html#observedAttributes">observedAttributes</a></li><li><a href="global.html#parseValue">parseValue</a></li><li><a href="global.html#pref">pref</a></li><li><a href="global.html#processResults">processResults</a></li><li><a href="global.html#readySignal">readySignal</a></li><li><a href="global.html#regexEscape">regexEscape</a></li><li><a href="global.html#removeStoragePrefCookie">removeStoragePrefCookie</a></li><li><a href="global.html#replaceStoragePrompt">replaceStoragePrompt</a></li><li><a href="global.html#set">set</a></li><li><a href="global.html#setupCurConfig">setupCurConfig</a></li><li><a href="global.html#setupCurPrefs">setupCurPrefs</a></li><li><a href="global.html#src">src</a></li><li><a href="global.html#stateEffects">stateEffects</a></li><li><a href="global.html#stepDown">stepDown</a></li><li><a href="global.html#stepUp">stepUp</a></li><li><a href="global.html#touchHandler">touchHandler</a></li><li><a href="global.html#updateLib">updateLib</a></li><li><a href="global.html#value">value</a></li></ul>
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