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<h1 class="page-title">Source: svgcanvas/text-actions.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* @module text-actions Tools for Text edit functions
* @license MIT
*
* @copyright 2010 Alexis Deveria, 2010 Jeff Schiller
*/
import { NS } from './namespaces.js';
import {
transformPoint, getMatrix
} from './math.js';
import {
assignAttributes, getElem, getBBox as utilsGetBBox
} from './utilities.js';
import {
supportsGoodTextCharPos
} from '../common/browser.js';
let textActionsContext_ = null;
/**
* @function module:text-actions.init
* @param {module:text-actions.textActionsContext_} textActionsContext
* @returns {void}
*/
export const init = function (textActionsContext) {
textActionsContext_ = textActionsContext;
};
/**
* Group: Text edit functions
* Functions relating to editing text elements.
* @namespace {PlainObject} textActions
* @memberof module:svgcanvas.SvgCanvas#
*/
export const textActionsMethod = (function () {
let curtext;
let textinput;
let cursor;
let selblock;
let blinker;
let chardata = [];
let textbb; // , transbb;
let matrix;
let lastX; let lastY;
let allowDbl;
/**
*
* @param {Integer} index
* @returns {void}
*/
function setCursor (index) {
const empty = (textinput.value === '');
textinput.focus();
if (!arguments.length) {
if (empty) {
index = 0;
} else {
if (textinput.selectionEnd !== textinput.selectionStart) { return; }
index = textinput.selectionEnd;
}
}
const charbb = chardata[index];
if (!empty) {
textinput.setSelectionRange(index, index);
}
cursor = getElem('text_cursor');
if (!cursor) {
cursor = document.createElementNS(NS.SVG, 'line');
assignAttributes(cursor, {
id: 'text_cursor',
stroke: '#333',
'stroke-width': 1
});
getElem('selectorParentGroup').append(cursor);
}
if (!blinker) {
blinker = setInterval(function () {
const show = (cursor.getAttribute('display') === 'none');
cursor.setAttribute('display', show ? 'inline' : 'none');
}, 600);
}
const startPt = ptToScreen(charbb.x, textbb.y);
const endPt = ptToScreen(charbb.x, (textbb.y + textbb.height));
assignAttributes(cursor, {
x1: startPt.x,
y1: startPt.y,
x2: endPt.x,
y2: endPt.y,
visibility: 'visible',
display: 'inline'
});
if (selblock) { selblock.setAttribute('d', ''); }
}
/**
*
* @param {Integer} start
* @param {Integer} end
* @param {boolean} skipInput
* @returns {void}
*/
function setSelection (start, end, skipInput) {
if (start === end) {
setCursor(end);
return;
}
if (!skipInput) {
textinput.setSelectionRange(start, end);
}
selblock = getElem('text_selectblock');
if (!selblock) {
selblock = document.createElementNS(NS.SVG, 'path');
assignAttributes(selblock, {
id: 'text_selectblock',
fill: 'green',
opacity: 0.5,
style: 'pointer-events:none'
});
getElem('selectorParentGroup').append(selblock);
}
const startbb = chardata[start];
const endbb = chardata[end];
cursor.setAttribute('visibility', 'hidden');
const tl = ptToScreen(startbb.x, textbb.y);
const tr = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y);
const bl = ptToScreen(startbb.x, textbb.y + textbb.height);
const br = ptToScreen(startbb.x + (endbb.x - startbb.x), textbb.y + textbb.height);
const dstr = 'M' + tl.x + ',' + tl.y +
' L' + tr.x + ',' + tr.y +
' ' + br.x + ',' + br.y +
' ' + bl.x + ',' + bl.y + 'z';
assignAttributes(selblock, {
d: dstr,
display: 'inline'
});
}
/**
*
* @param {Float} mouseX
* @param {Float} mouseY
* @returns {Integer}
*/
function getIndexFromPoint (mouseX, mouseY) {
// Position cursor here
const pt = textActionsContext_.getSVGRoot().createSVGPoint();
pt.x = mouseX;
pt.y = mouseY;
// No content, so return 0
if (chardata.length === 1) { return 0; }
// Determine if cursor should be on left or right of character
let charpos = curtext.getCharNumAtPosition(pt);
if (charpos < 0) {
// Out of text range, look at mouse coords
charpos = chardata.length - 2;
if (mouseX <= chardata[0].x) {
charpos = 0;
}
} else if (charpos >= chardata.length - 2) {
charpos = chardata.length - 2;
}
const charbb = chardata[charpos];
const mid = charbb.x + (charbb.width / 2);
if (mouseX > mid) {
charpos++;
}
return charpos;
}
/**
*
* @param {Float} mouseX
* @param {Float} mouseY
* @returns {void}
*/
function setCursorFromPoint (mouseX, mouseY) {
setCursor(getIndexFromPoint(mouseX, mouseY));
}
/**
*
* @param {Float} x
* @param {Float} y
* @param {boolean} apply
* @returns {void}
*/
function setEndSelectionFromPoint (x, y, apply) {
const i1 = textinput.selectionStart;
const i2 = getIndexFromPoint(x, y);
const start = Math.min(i1, i2);
const end = Math.max(i1, i2);
setSelection(start, end, !apply);
}
/**
*
* @param {Float} xIn
* @param {Float} yIn
* @returns {module:math.XYObject}
*/
function screenToPt (xIn, yIn) {
const out = {
x: xIn,
y: yIn
};
const currentZoom = textActionsContext_.getCurrentZoom();
out.x /= currentZoom;
out.y /= currentZoom;
if (matrix) {
const pt = transformPoint(out.x, out.y, matrix.inverse());
out.x = pt.x;
out.y = pt.y;
}
return out;
}
/**
*
* @param {Float} xIn
* @param {Float} yIn
* @returns {module:math.XYObject}
*/
function ptToScreen (xIn, yIn) {
const out = {
x: xIn,
y: yIn
};
if (matrix) {
const pt = transformPoint(out.x, out.y, matrix);
out.x = pt.x;
out.y = pt.y;
}
const currentZoom = textActionsContext_.getCurrentZoom();
out.x *= currentZoom;
out.y *= currentZoom;
return out;
}
/**
*
* @param {Event} evt
* @returns {void}
*/
function selectAll (evt) {
setSelection(0, curtext.textContent.length);
evt.target.removeEventListener('click', selectAll);
}
/**
*
* @param {Event} evt
* @returns {void}
*/
function selectWord (evt) {
if (!allowDbl || !curtext) { return; }
const currentZoom = textActionsContext_.getCurrentZoom();
const ept = transformPoint(evt.pageX, evt.pageY, textActionsContext_.getrootSctm());
const mouseX = ept.x * currentZoom;
const mouseY = ept.y * currentZoom;
const pt = screenToPt(mouseX, mouseY);
const index = getIndexFromPoint(pt.x, pt.y);
const str = curtext.textContent;
const first = str.substr(0, index).replace(/[a-z\d]+$/i, '').length;
const m = str.substr(index).match(/^[a-z\d]+/i);
const last = (m ? m[0].length : 0) + index;
setSelection(first, last);
// Set tripleclick
evt.target.addEventListener('click', selectAll);
setTimeout(function () {
evt.target.removeEventListener('click', selectAll);
}, 300);
}
return /** @lends module:svgcanvas.SvgCanvas#textActions */ {
/**
* @param {Element} target
* @param {Float} x
* @param {Float} y
* @returns {void}
*/
select (target, x, y) {
curtext = target;
textActionsContext_.getCanvas().textActions.toEditMode(x, y);
},
/**
* @param {Element} elem
* @returns {void}
*/
start (elem) {
curtext = elem;
textActionsContext_.getCanvas().textActions.toEditMode();
},
/**
* @param {external:MouseEvent} evt
* @param {Element} mouseTarget
* @param {Float} startX
* @param {Float} startY
* @returns {void}
*/
mouseDown (evt, mouseTarget, startX, startY) {
const pt = screenToPt(startX, startY);
textinput.focus();
setCursorFromPoint(pt.x, pt.y);
lastX = startX;
lastY = startY;
// TODO: Find way to block native selection
},
/**
* @param {Float} mouseX
* @param {Float} mouseY
* @returns {void}
*/
mouseMove (mouseX, mouseY) {
const pt = screenToPt(mouseX, mouseY);
setEndSelectionFromPoint(pt.x, pt.y);
},
/**
* @param {external:MouseEvent} evt
* @param {Float} mouseX
* @param {Float} mouseY
* @returns {void}
*/
mouseUp (evt, mouseX, mouseY) {
const pt = screenToPt(mouseX, mouseY);
setEndSelectionFromPoint(pt.x, pt.y, true);
// TODO: Find a way to make this work: Use transformed BBox instead of evt.target
// if (lastX === mouseX && lastY === mouseY
// && !rectsIntersect(transbb, {x: pt.x, y: pt.y, width: 0, height: 0})) {
// textActionsContext_.getCanvas().textActions.toSelectMode(true);
// }
if (
evt.target !== curtext &&
mouseX < lastX + 2 &&
mouseX > lastX - 2 &&
mouseY < lastY + 2 &&
mouseY > lastY - 2
) {
textActionsContext_.getCanvas().textActions.toSelectMode(true);
}
},
/**
* @function
* @param {Integer} index
* @returns {void}
*/
setCursor,
/**
* @param {Float} x
* @param {Float} y
* @returns {void}
*/
toEditMode (x, y) {
allowDbl = false;
textActionsContext_.setCurrentMode('textedit');
textActionsContext_.getCanvas().selectorManager.requestSelector(curtext).showGrips(false);
// Make selector group accept clicks
/* const selector = */ textActionsContext_.getCanvas().selectorManager.requestSelector(curtext); // Do we need this? Has side effect of setting lock, so keeping for now, but next line wasn't being used
// const sel = selector.selectorRect;
textActionsContext_.getCanvas().textActions.init();
curtext.style.cursor = 'text';
// if (supportsEditableText()) {
// curtext.setAttribute('editable', 'simple');
// return;
// }
if (!arguments.length) {
setCursor();
} else {
const pt = screenToPt(x, y);
setCursorFromPoint(pt.x, pt.y);
}
setTimeout(function () {
allowDbl = true;
}, 300);
},
/**
* @param {boolean|Element} selectElem
* @fires module:svgcanvas.SvgCanvas#event:selected
* @returns {void}
*/
toSelectMode (selectElem) {
textActionsContext_.setCurrentMode('select');
clearInterval(blinker);
blinker = null;
if (selblock) { selblock.setAttribute('display', 'none'); }
if (cursor) { cursor.setAttribute('visibility', 'hidden'); }
curtext.style.cursor = 'move';
if (selectElem) {
textActionsContext_.getCanvas().clearSelection();
curtext.style.cursor = 'move';
textActionsContext_.call('selected', [ curtext ]);
textActionsContext_.getCanvas().addToSelection([ curtext ], true);
}
if (curtext && !curtext.textContent.length) {
// No content, so delete
textActionsContext_.getCanvas().deleteSelectedElements();
}
textinput.blur();
curtext = false;
// if (supportsEditableText()) {
// curtext.removeAttribute('editable');
// }
},
/**
* @param {Element} elem
* @returns {void}
*/
setInputElem (elem) {
textinput = elem;
},
/**
* @returns {void}
*/
clear () {
if (textActionsContext_.getCurrentMode() === 'textedit') {
textActionsContext_.getCanvas().textActions.toSelectMode();
}
},
/**
* @param {Element} _inputElem Not in use
* @returns {void}
*/
init (_inputElem) {
if (!curtext) { return; }
let i; let end;
// if (supportsEditableText()) {
// curtext.select();
// return;
// }
if (!curtext.parentNode) {
// Result of the ffClone, need to get correct element
const selectedElements = textActionsContext_.getSelectedElements();
curtext = selectedElements[0];
textActionsContext_.getCanvas().selectorManager.requestSelector(curtext).showGrips(false);
}
const str = curtext.textContent;
const len = str.length;
const xform = curtext.getAttribute('transform');
textbb = utilsGetBBox(curtext);
matrix = xform ? getMatrix(curtext) : null;
chardata = [];
chardata.length = len;
textinput.focus();
curtext.removeEventListener("dblclick", selectWord);
curtext.addEventListener("dblclick", selectWord);
if (!len) {
end = { x: textbb.x + (textbb.width / 2), width: 0 };
}
for (i = 0; i < len; i++) {
const start = curtext.getStartPositionOfChar(i);
end = curtext.getEndPositionOfChar(i);
if (!supportsGoodTextCharPos()) {
const currentZoom = textActionsContext_.getCurrentZoom();
const offset = textActionsContext_.getCanvas().contentW * currentZoom;
start.x -= offset;
end.x -= offset;
start.x /= currentZoom;
end.x /= currentZoom;
}
// Get a "bbox" equivalent for each character. Uses the
// bbox data of the actual text for y, height purposes
// TODO: Decide if y, width and height are actually necessary
chardata[i] = {
x: start.x,
y: textbb.y, // start.y?
width: end.x - start.x,
height: textbb.height
};
}
// Add a last bbox for cursor at end of text
chardata.push({
x: end.x,
width: 0
});
setSelection(textinput.selectionStart, textinput.selectionEnd, true);
}
};
}());
</code></pre>
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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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