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StringRender.js
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/*
* (c) Copyright Ascensio System SIA 2010-2024
*
* This program is a free software product. You can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License (AGPL)
* version 3 as published by the Free Software Foundation. In accordance with
* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
* that Ascensio System SIA expressly excludes the warranty of non-infringement
* of any third-party rights.
*
* This program is distributed WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
*
* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
* street, Riga, Latvia, EU, LV-1050.
*
* The interactive user interfaces in modified source and object code versions
* of the Program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU AGPL version 3.
*
* Pursuant to Section 7(b) of the License you must retain the original Product
* logo when distributing the program. Pursuant to Section 7(e) we decline to
* grant you any rights under trademark law for use of our trademarks.
*
* All the Product's GUI elements, including illustrations and icon sets, as
* well as technical writing content are licensed under the terms of the
* Creative Commons Attribution-ShareAlike 4.0 International. See the License
* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
*
*/
"use strict";
(
/**
* @param {Window} window
* @param {undefined} undefined
*/
function (window, undefined) {
/*
* Import
* -----------------------------------------------------------------------------
*/
var asc = window["Asc"];
var asc_debug = asc.outputDebugStr;
var asc_typeof = asc.typeOf;
var asc_round = asc.round;
function LineInfo(lm) {
this.tw = 0;
this.th = 0;
this.bl = 0;
this.a = 0;
this.d = 0;
this.beg = undefined;
this.end = undefined;
this.startX = undefined;
this.assign(lm);
}
LineInfo.prototype.assign = function (lm) {
if (lm) {
this.th = lm.th;
this.bl = lm.bl;
this.a = lm.a;
this.d = lm.d;
}
};
LineInfo.prototype.initStartX = function (lineWidth ,x, maxWidth, align) {
var x_ = x;
if (align === AscCommon.align_Right) {
x_ = x + maxWidth - lineWidth - 1/*px*/;
} else if (align === AscCommon.align_Center) {
x_ = x + 0.5 * (maxWidth - lineWidth);
}
this.startX = x_;
return x_;
};
/** @constructor */
function lineMetrics() {
this.th = 0;
this.bl = 0;
this.bl2 = 0;
this.a = 0;
this.d = 0;
}
lineMetrics.prototype.clone = function () {
var oRes = new lineMetrics();
oRes.th = this.th;
oRes.bl = this.bl;
oRes.bl2 = this.bl2;
oRes.a = this.a;
oRes.d = this.d;
return oRes;
};
/** @constructor */
function charProperties() {
this.grapheme = AscFonts.NO_GRAPHEME;
this.c = undefined;
this.lm = undefined;
this.fm = undefined;
this.fsz = undefined;
this.font = undefined;
this.va = undefined;
this.nl = undefined;
this.hp = undefined;
this.delta = undefined;
this.skip = undefined;
this.repeat = undefined;
this.total = undefined;
this.wrd = undefined;
}
charProperties.prototype.clone = function () {
var oRes = new charProperties();
oRes.grapheme = this.grapheme;
oRes.c = (undefined !== this.c) ? this.c.clone() : undefined;
oRes.lm = (undefined !== this.lm) ? this.lm.clone() : undefined;
oRes.fm = (undefined !== this.fm) ? this.fm.clone() : undefined;
oRes.font = (undefined !== this.font) ? this.font.clone() : undefined;
oRes.fsz = this.fsz;
oRes.va = this.va;
oRes.nl = this.nl;
oRes.hp = this.hp;
oRes.delta = this.delta;
oRes.skip = this.skip;
oRes.repeat = this.repeat;
oRes.total = this.total;
oRes.wrd = this.wrd;
return oRes;
};
/**
*
* @constructor
*/
function FragmentShaper() {
AscFonts.CTextShaper.call(this);
this.font = null;
this.stringRenderer = null;
this.charIndex = 0;
}
FragmentShaper.prototype = Object.create(AscFonts.CTextShaper.prototype);
FragmentShaper.prototype.constructor = FragmentShaper;
FragmentShaper.prototype.shapeFragment = function(chars, font, stringRenderer, beginIndex) {
this.font = font;
this.stringRenderer = stringRenderer;
this.charIndex = beginIndex;
this.StartString();
let char, isNL, isSP;
for (let i = 0; i < chars.length; ++i) {
char = chars[i];
isNL = stringRenderer.codesHypNL[char];
isSP = !isNL ? stringRenderer.codesHypSp[char] : false;
if (isNL || isSP) {
this.FlushWord();
this._handleSpace(char);
} else {
this.AppendToString(char);
}
}
this.FlushWord();
};
FragmentShaper.prototype._handleSpace = function(char) {
let st = this.stringRenderer;
let _width = this.stringRenderer.drawingCtx.measureChar(null, 0, char).width;
st._getCharPropAt(this.charIndex).grapheme = AscFonts.NO_GRAPHEME;
st.charWidths[this.charIndex] = _width;
st.chars[this.charIndex] = char;
++this.charIndex;
};
FragmentShaper.prototype.FlushGrapheme = function(grapheme, width, codePointCount, isLigature) {
if (codePointCount <= 0)
return;
let st = this.stringRenderer;
let _width = asc_round(width * this.font.getSize() / 25.4 * this.stringRenderer.drawingCtx.getPPIY());
// Make all widths integer values
let w = Math.trunc(_width / codePointCount);
let r = Math.max(0, _width - w * codePointCount);
// TODO: RTL
st._getCharPropAt(this.charIndex).grapheme = grapheme;
st.charWidths[this.charIndex] = w;
st.chars[this.charIndex] = this.Buffer[this.BufferIndex];
++this.charIndex;
for (let i = 1; i < codePointCount; ++i)
{
st._getCharPropAt(this.charIndex).grapheme = AscFonts.NO_GRAPHEME;
st.charWidths[this.charIndex] = w + (r ? 1 : 0);
st.chars[this.charIndex] = this.Buffer[this.BufferIndex + i];
++this.charIndex;
if (r)
--r;
}
if (this.IsRtlDirection())
this.BufferIndex -= codePointCount;
else
this.BufferIndex += codePointCount;
};
FragmentShaper.prototype.GetFontSlot = function() {
return AscWord.fontslot_ASCII;
};
FragmentShaper.prototype.GetDirection = function(script) {
return AscFonts.HB_DIRECTION.HB_DIRECTION_LTR;
};
FragmentShaper.prototype.GetFontInfo = function() {
return {
Name : this.font.getName(),
Size : this.font.getSize(),
Style : (this.font.getBold() ? 1 : 0) | (this.font.getItalic() ? 2 : 0)
};
};
/**
* Formatted text render
* -----------------------------------------------------------------------------
* @constructor
* @param {DrawingContext} drawingCtx Context for drawing on
*
* @memberOf Asc
*/
function StringRender(drawingCtx) {
this.drawingCtx = drawingCtx;
this.fragmentShaper = new FragmentShaper();
/** @type Array */
this.fragments = undefined;
/** @type Object */
this.flags = undefined;
/** @type String */
this.chars = [];
this.charWidths = [];
this.charProps = [];
this.lines = [];
this.angle = 0;
this.codesNL = {0xD: 1, 0xA: 1};
this.codesSpace = {
0xA: 1,
0xD: 1,
0x2028: 1,
0x2029: 1,
0x9: 1,
0xB: 1,
0xC: 1,
0x0020: 1,
0x2000: 1,
0x2001: 1,
0x2002: 1,
0x2003: 1,
0x2004: 1,
0x2005: 1,
0x2006: 1,
0x2008: 1,
0x2009: 1,
0x200A: 1,
0x200B: 1,
0x205F: 1,
0x3000: 1
};
this.codesReplaceNL = {};
this.codesHypNL = {
0xA: 1, 0xD: 1, 0x2028: 1, 0x2029: 1
};
this.codesHypSp = {
0x9: 1,
0xB: 1,
0xC: 1,
0x0020: 1,
0x2000: 1,
0x2001: 1,
0x2002: 1,
0x2003: 1,
0x2004: 1,
0x2005: 1,
0x2006: 1,
0x2008: 1,
0x2009: 1,
0x200A: 1,
0x200B: 1,
0x205F: 1,
0x3000: 1
};
this.codesHyphen = {
0x002D: 1, 0x00AD: 1, 0x2010: 1, 0x2012: 1, 0x2013: 1, 0x2014: 1
};
// For replacing invisible chars while rendering
/** @type RegExp */
this.reNL = /[\r\n]/;
/** @type RegExp */
//this.reSpace = /[\n\r\u2028\u2029\t\v\f\u0020\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2008\u2009\u200A\u200B\u205F\u3000]/;
/** @type RegExp */
this.reReplaceNL = /\r?\n|\r/g;
// For hyphenation
/** @type RegExp */
//this.reHypNL = /[\n\r\u2028\u2029]/;
/** @type RegExp */
//this.reHypSp = /[\t\v\f\u0020\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2008\u2009\u200A\u200B\u205F\u3000]/;
/** @type RegExp */
//this.reHyphen = /[\u002D\u00AD\u2010\u2012\u2013\u2014]/;
return this;
}
/**
* Setups one or more strings to process on
* @param {String|Array} fragments A simple string or array of formatted strings AscCommonExcel.Fragment
* @param {AscCommonExcel.CellFlags} flags Optional.
* @return {StringRender} Returns 'this' to allow chaining
*/
StringRender.prototype.setString = function (fragments, flags) {
this.fragments = [];
if (asc_typeof(fragments) === "string") {
var newFragment = new AscCommonExcel.Fragment();
newFragment.setFragmentText(fragments);
newFragment.format = new AscCommonExcel.Font();
this.fragments.push(newFragment);
} else {
for (var i = 0; i < fragments.length; ++i) {
this.fragments.push(fragments[i].clone());
}
}
this.flags = flags;
this._reset();
this._setFont(this.drawingCtx, AscCommonExcel.g_oDefaultFormat.Font);
return this;
};
/**
* Применяем только трансформации поворота в области
* @param {drawingCtx} drawingCtx
* @param {type} angle Угол поворота в градусах
* @param {Number} x
* @param {Number} y
* @param {Number} dx
* @param {Number} dy
* */
StringRender.prototype.rotateAtPoint = function (drawingCtx, angle, x, y, dx, dy) {
var m = new asc.Matrix();
m.rotate(angle, 0);
var mbt = new asc.Matrix();
if (null === drawingCtx) {
mbt.translate(x + dx, y + dy);
this.drawingCtx.setTextTransform(m.sx, m.shy, m.shx, m.sy, m.tx, m.ty);
this.drawingCtx.setTransform(mbt.sx, mbt.shy, mbt.shx, mbt.sy, mbt.tx, mbt.ty);
this.drawingCtx.updateTransforms();
} else {
mbt.translate((x + dx) * AscCommonExcel.vector_koef, (y + dy) * AscCommonExcel.vector_koef);
mbt.multiply(m, 0);
drawingCtx.setTransform(mbt.sx, mbt.shy, mbt.shx, mbt.sy, mbt.tx, mbt.ty);
}
return this;
};
StringRender.prototype.resetTransform = function (drawingCtx) {
if (null === drawingCtx) {
this.drawingCtx.resetTransforms();
} else {
var m = new asc.Matrix();
drawingCtx.setTransform(m.sx, m.shy, m.shx, m.sy, m.tx, m.ty);
}
this.angle = 0;
};
/**
* @param {Number} angle
* @param {Number} w
* @param {Number} h
* @param {Number} textW
* @param {String} alignHorizontal
* @param {String} alignVertical
* @param {Number} maxWidth
*/
StringRender.prototype.getTransformBound = function (angle, w, h, textW, alignHorizontal, alignVertical, maxWidth) {
var ctx = this.drawingCtx;
// TODO: добавить padding по сторонам
this.angle = 0; // angle;
var dx = 0, dy = 0, offsetX = 0, // смещение BB
tm = this._doMeasure(maxWidth),
mul = (90 - (Math.abs(angle))) / 90,
angleSin = Math.sin(angle * Math.PI / 180.0),
angleCos = Math.cos(angle * Math.PI / 180.0),
posh = (angle === 90 || angle === -90) ? textW : Math.abs(angleSin * textW),
posv = (angle === 90 || angle === -90) ? 0 : Math.abs(angleCos * textW),
isHorzLeft = (AscCommon.align_Left === alignHorizontal),
isHorzCenter = (AscCommon.align_Center === alignHorizontal),
isHorzRight = (AscCommon.align_Right === alignHorizontal),
isVertBottom = (Asc.c_oAscVAlign.Bottom === alignVertical),
isVertCenter = (Asc.c_oAscVAlign.Center === alignVertical || Asc.c_oAscVAlign.Dist === alignVertical || Asc.c_oAscVAlign.Just === alignVertical),
isVertTop = (Asc.c_oAscVAlign.Top === alignVertical);
var _height = tm.height * ctx.getZoom();
if (isVertBottom) {
if (angle < 0) {
if (isHorzLeft) {
dx = -(angleSin * _height);
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 - angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 2;
offsetX = -(w - posv) - angleSin * _height - 2;
}
} else {
if (isHorzLeft) {
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 + angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 1 + 1 - _height * angleSin;
offsetX = -w - posv + 1 + 1 - _height * angleSin;
}
}
if (posh < h) {
if (angle < 0) {
dy = h - (posh + angleCos * _height);
} else {
dy = h - angleCos * _height;
}
} else {
if (angle > 0) {
dy = h - angleCos * _height;
}
}
} else if (isVertCenter) {
if (angle < 0) {
if (isHorzLeft) {
dx = -(angleSin * _height);
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 - angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 2;
offsetX = -(w - posv) - angleSin * _height - 2;
}
} else {
if (isHorzLeft) {
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 + angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 1 + 1 - _height * angleSin;
offsetX = -w - posv + 1 + 1 - _height * angleSin;
}
}
//
if (posh < h) {
if (angle < 0) {
dy = (h - posh - angleCos * _height) * 0.5;
} else {
dy = (h + posh - angleCos * _height) * 0.5;
}
} else {
if (angle > 0) {
dy = h - angleCos * _height;
}
}
} else if (isVertTop) {
if (angle < 0) {
if (isHorzLeft) {
dx = -(angleSin * _height);
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 - angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 2;
offsetX = -(w - posv) - angleSin * _height - 2;
}
} else {
if (isHorzLeft) {
} else if (isHorzCenter) {
dx = (w - angleSin * _height - posv) / 2;
offsetX = -(w - posv) / 2 + angleSin * _height / 2;
} else if (isHorzRight) {
dx = w - posv + 1 + 1 - _height * angleSin;
offsetX = -w - posv + 1 + 1 - _height * angleSin;
}
dy = Math.min(h + _height * angleCos, posh);
}
}
var bound = {dx: dx, dy: dy, height: 0, width: 0, offsetX: offsetX};
if (angle === 90 || angle === -90) {
bound.width = _height;
bound.height = textW;
} else {
bound.height = Math.abs(angleSin * textW) + Math.abs(angleCos * _height);
bound.width = Math.abs(angleCos * textW) + Math.abs(angleSin * _height);
}
return bound;
};
/**
* Measures string that was setup by 'setString' method
* @param {Number} maxWidth Optional. Text width restriction
* @return {Asc.TextMetrics} Returns text metrics or null. @see Asc.TextMetrics
*/
StringRender.prototype.measure = function (maxWidth) {
return this._doMeasure(maxWidth);
};
/**
* Draw string that was setup by methods 'setString' or 'measureString'
* @param {drawingCtx} drawingCtx
* @param {Number} x Left of the text rect
* @param {Number} y Top of the text rect
* @param {Number} maxWidth Text width restriction
* @param {String} textColor Default text color for formatless string
* @return {StringRender} Returns 'this' to allow chaining
*/
StringRender.prototype.render = function (drawingCtx, x, y, maxWidth, textColor) {
this._doRender(drawingCtx, x, y, maxWidth, textColor);
return this;
};
/**
* Measures string
* @param {String|Array} fragments A simple string or array of formatted strings AscCommonExcel.Fragment
* @param {AscCommonExcel.CellFlags} [flags] Optional.
* @param {Number} [maxWidth] Optional. Text width restriction
* @return {Asc.TextMetrics} Returns text metrics or null. @see Asc.TextMetrics
*/
StringRender.prototype.measureString = function (fragments, flags, maxWidth) {
if (fragments) {
this.setString(fragments, flags);
}
return this._doMeasure(maxWidth);
};
/**
* Returns the width of the widest char in the string has been measured
*/
StringRender.prototype.getWidestCharWidth = function () {
return this.charWidths.reduce(function (p, c) {
return p < c ? c : p;
}, 0);
};
StringRender.prototype._reset = function () {
this.chars = [];
this.charWidths = [];
this.charProps = [];
this.lines = [];
};
/**
* @param {String} fragment
* @param {Boolean} wrap
* @return {String} Returns filtered fragment
*/
StringRender.prototype._filterText = function (fragment, wrap) {
var s = fragment;
if (s.search(this.reNL) >= 0) {
s = s.replace(this.reReplaceNL, wrap ? "\n" : "");
}
return s;
};
StringRender.prototype._filterChars = function (chars, wrap) {
var res = [];
if (chars) {
for (var i = 0; i < chars.length; i++) {
if (0xD === chars[i] && 0xA === chars[i + 1]) {
//\r\n
if (wrap) {
res.push(0xA);
}
i++;
} else if (0xA === chars[i]) {
//\r
if (wrap) {
res.push(0xA);
}
} else {
res.push(chars[i]);
}
}
}
return res;
};
/**
* @param {Number} startCh
* @param {Number} endCh
* @return {Number}
*/
StringRender.prototype._calcCharsWidth = function (startCh, endCh) {
for (var w = 0, i = startCh; i <= endCh; ++i) {
w += this.charWidths[i];
}
return w;
};
/**
* @param {Number} startPos
* @param {Number} endPos
* @return {Number}
*/
StringRender.prototype._calcLineWidth = function (startPos, endPos) {
var wrap = this.flags && (this.flags.wrapText || this.flags.wrapOnlyNL || this.flags.wrapOnlyCE);
var isAtEnd, j, chProp, tw;
if (endPos === undefined || endPos < 0) {
// search for end of line
for (j = startPos + 1; j < this.chars.length; ++j) {
chProp = this.charProps[j];
if (chProp && (chProp.nl || chProp.hp)) {
break;
}
}
endPos = j - 1;
}
for (j = endPos, tw = 0, isAtEnd = true; j >= startPos; --j) {
if (isAtEnd) {
// skip space char at end of line
if ((wrap) && this.codesSpace[this.chars[j]]) {
continue;
}
isAtEnd = false;
}
tw += this.charWidths[j];
}
return tw;
};
StringRender.prototype._calcLineMetrics = function (f, va, fm) {
var l = new lineMetrics();
if (!va) {
var _a = Math.max(0, asc.ceil(fm.nat_y1 * f / fm.nat_scale));
var _d = Math.max(0, asc.ceil(-fm.nat_y2 * f / fm.nat_scale)) + 1; // 1 px for border
l.th = _a + _d;
l.bl = _a;
l.a = _a;
l.d = _d;
} else {
var ppi = 96;
var hpt = f * 1.275;
var fpx = f * ppi / 72;
var topt = 72 / ppi;
var h;
var a = asc_round(fpx) * topt;
var d;
var a_2 = asc_round(fpx / 2) * topt;
var h_2_3;
var a_2_3 = asc_round(fpx * 2 / 3) * topt;
var d_2_3;
var x = a_2 + a_2_3;
if (va === AscCommon.vertalign_SuperScript) {
h = hpt;
d = h - a;
l.th = x + d;
l.bl = x;
l.bl2 = a_2_3;
l.a = fm.ascender + a_2; // >0
l.d = fm.descender - a_2; // <0
} else if (va === AscCommon.vertalign_SubScript) {
h_2_3 = hpt * 2 / 3;
d_2_3 = h_2_3 - a_2_3;
l.th = x + d_2_3;
l.bl = a;
l.bl2 = x;
l.a = fm.ascender + a - x; // >0
l.d = fm.descender + x - a; // >0
}
}
return l;
};
StringRender.prototype._calcLineMetrics2 = function (f, va, fm) {
var l = new lineMetrics();
var a = Math.max(0, asc.ceil(fm.nat_y1 * f / fm.nat_scale));
var d = Math.max(0, asc.ceil(-fm.nat_y2 * f / fm.nat_scale)) + 1; // 1 px for border
/*
// ToDo
if (va) {
var k = (AscCommon.vertalign_SuperScript === va) ? AscCommon.vaKSuper : AscCommon.vaKSub;
d += asc.ceil((a + d) * k);
f = asc.ceil(f * 2 / 3 / 0.5) * 0.5; // Round 0.5
a = Math.max(0, asc.ceil(fm.nat_y1 * f / fm.nat_scale));
}
*/
l.th = a + d;
l.bl = a;
l.a = a;
l.d = d;
return l;
};
StringRender.prototype.calcDelta = function (vnew, vold) {
return vnew > vold ? vnew - vold : 0;
};
/**
* @param {Boolean} [dontCalcRepeatChars]
* @return {Asc.TextMetrics}
*/
StringRender.prototype._calcTextMetrics = function (dontCalcRepeatChars) {
var self = this, i = 0, p, p_, lm, beg = 0;
var l = new LineInfo(), TW = 0, TH = 0, BL = 0;
function addLine(b, e) {
if (-1 !== b)
l.tw += self._calcLineWidth(b, e);
l.beg = b;
l.end = e < b ? b : e;
self.lines.push(l);
if (TW < l.tw) {
TW = l.tw;
}
BL = TH + l.bl;
TH += l.th;
}
if (0 >= this.chars.length) {
p = this.charProps[0];
if (p && p.font) {
lm = this._calcLineMetrics(p.fsz !== undefined ? p.fsz : p.font.getSize(), p.va, p.fm);
l.assign(lm);
addLine(-1, -1);
l.beg = l.end = 0;
}
} else {
for (; i < this.chars.length; ++i) {
p = this.charProps[i];
// if font has been changed than calc and update line height and etc.
if (p && p.font) {
lm = this._calcLineMetrics(p.fsz !== undefined ? p.fsz : p.font.getSize(), p.va, p.fm);
if (i === 0) {
l.assign(lm);
} else {
l.th += this.calcDelta(lm.bl, l.bl) + this.calcDelta(lm.th - lm.bl, l.th - l.bl);
l.bl += this.calcDelta(lm.bl, l.bl);
l.a += this.calcDelta(lm.a, l.a);
l.d += this.calcDelta(lm.d, l.d);
}
p.lm = lm;
p_ = p;
}
// process 'repeat char' marker
if (dontCalcRepeatChars && p && p.repeat) {
l.tw -= this._calcCharsWidth(i, i + p.total);
}
// process 'new line' marker
if (p && (p.nl || p.hp)) {
addLine(beg, i);
beg = i + (p.nl ? 1 : 0);
lm = this._calcLineMetrics(p_.fsz !== undefined ? p_.fsz : p_.font.getSize(), p_.va, p_.fm);
l = new LineInfo(lm);
}
}
if (beg <= i) {
// add last line of text
addLine(beg, i - 1);
}
}
return new asc.TextMetrics(TW, TH, 0, BL, 0, 0);
};
StringRender.prototype._getRepeatCharPos = function () {
var charProp;
for (var i = 0; i < this.chars.length; ++i) {
charProp = this.charProps[i];
if (charProp && charProp.repeat)
return i;
}
return -1;
};
/**
* @param {Number} maxWidth
*/
StringRender.prototype._insertRepeatChars = function (maxWidth) {
var self = this, width, w, pos, charProp;
function insertRepeatChars() {
if (0 === charProp.total)
return; // Символ уже изначально лежит в строке и в списке
var repeatEnd = pos + charProp.total;
self.chars = [].concat(
self.chars.slice(0, repeatEnd),
self.chars.slice(pos, pos + 1),
self.chars.slice(repeatEnd));
self.charWidths = [].concat(
self.charWidths.slice(0, repeatEnd),
self.charWidths.slice(pos, pos + 1),
self.charWidths.slice(repeatEnd));
self.charProps = [].concat(
self.charProps.slice(0, repeatEnd),
self.charProps.slice(pos, pos + 1),
self.charProps.slice(repeatEnd));
}
function removeRepeatChar() {
self.chars = [].concat(
self.chars.slice(0, pos),
self.chars.slice(pos + 1));
self.charWidths = [].concat(
self.charWidths.slice(0, pos),
self.charWidths.slice(pos + 1));
self.charProps = [].concat(
self.charProps.slice(0, pos),
self.charProps.slice(pos + 1));
}
width = this._calcTextMetrics(true).width;
pos = this._getRepeatCharPos();
if (-1 === pos)
return;
w = this._calcCharsWidth(pos, pos);
charProp = this.charProps[pos];
while (charProp.total * w + width + w <= maxWidth) {
insertRepeatChars();
charProp.total += 1;
if (w === 0) {
break;
}
}
if (0 === charProp.total)
removeRepeatChar();
this.lines = [];
};
StringRender.prototype._getCharPropAt = function (index) {
var prop = this.charProps[index];
if (!prop) {
prop = this.charProps[index] = new charProperties();
}
return prop;
};
StringRender.prototype._getGraphemeDelta = function(grapheme, fontSize) {
let ppiy = this.drawingCtx.getPPIY();
let width = AscFonts.GetGraphemeWidth(grapheme) * ppiy / 25.4 * fontSize;
let bbox = AscFonts.GetGraphemeBBox(grapheme, fontSize, ppiy);
return bbox.maxX - bbox.minX + 1 - width;
};
/**
* @param {Number} maxWidth
* @return {Asc.TextMetrics}
*/
StringRender.prototype._measureChars = function (maxWidth) {
var self = this;
var ctx = this.drawingCtx;
var font = ctx.font;
var wrap = this.flags && (this.flags.wrapText || this.flags.wrapOnlyCE) && !this.flags.isNumberFormat;
var wrapNL = this.flags && this.flags.wrapOnlyNL;
var verticalText = this.flags && this.flags.verticalText;
var hasRepeats = false;
var i, j, fr, fmt, chars, p, p_ = {}, pIndex, startCh;
var tw = 0, nlPos = 0, isEastAsian, hpPos = undefined, isSP_ = true, delta = 0;
let frShaper = this.fragmentShaper;
function measureFragment(_chars, format) {
let chPos = self.chars.length;
let fontSize = format.getSize();
frShaper.shapeFragment(_chars, format, self, chPos);
var chc, chw, isNL, isSP, isHP;
for (; chPos < self.chars.length; ++chPos) {
chc = self.chars[chPos];
chw = self.charWidths[chPos];
isNL = self.codesHypNL[chc];
isSP = !isNL ? self.codesHypSp[chc] : false;
// if 'wrap flag' is set
if (wrap || wrapNL || verticalText) {
isHP = !isSP && !isNL ? self.codesHyphen[chc] : false;
isEastAsian = AscCommon.isEastAsianScript(chc);
if (verticalText) {
// ToDo verticalText and new line or space
} else if (isNL) {
// add new line marker
nlPos = chPos;
self._getCharPropAt(nlPos).nl = true;
self._getCharPropAt(nlPos).delta = delta;
chc = 0xA0;
chw = 0;
tw = 0;
hpPos = undefined;
self.charWidths[chPos] = 0;
} else if (isSP || isHP) {
// move hyphenation position
hpPos = chPos + 1;
} else if (isEastAsian) {
if (0 !== chPos && !(AscCommon.g_aPunctuation[self.chars[chPos - 1]] &
AscCommon.PUNCTUATION_FLAG_CANT_BE_AT_END_E) &&
!(AscCommon.g_aPunctuation[chc] & AscCommon.PUNCTUATION_FLAG_CANT_BE_AT_BEGIN_E)) {
// move hyphenation position
hpPos = chPos;
}
}
if (chPos !== nlPos && ((wrap && !isSP && tw + chw > maxWidth) || (verticalText && !self._isCombinedChar(chPos)))) {
// add hyphenation marker
nlPos = hpPos !== undefined ? hpPos : chPos;
self._getCharPropAt(nlPos).hp = true;
self._getCharPropAt(nlPos).delta = delta;
tw = self._calcCharsWidth(nlPos, chPos - 1);
hpPos = undefined;
}
if (isEastAsian) {
// move hyphenation position
if (chPos < self.chars.length - 1 && !(AscCommon.g_aPunctuation[self.chars[chPos + 1]] &
AscCommon.PUNCTUATION_FLAG_CANT_BE_AT_BEGIN_E) &&
!(AscCommon.g_aPunctuation[chc] & AscCommon.PUNCTUATION_FLAG_CANT_BE_AT_END_E)) {
hpPos = chPos + 1;
}
}
}
if (isSP_ && !isSP && !isNL) {
// add word beginning marker
self._getCharPropAt(chPos).wrd = true;
}
tw += chw;