f3484cc384
Consecutive "\n\n" at the end of the converted HTML into the Plain Text are not usually needed. They could pile up when re-editing the text, which both looks bad and is not desired, nor wanted.
1161 lines
31 KiB
JavaScript
1161 lines
31 KiB
JavaScript
/*
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* Copyright (C) 2019 Red Hat (www.redhat.com)
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*
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* This library is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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'use strict';
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/* semi-convention: private functions start with lower-case letter,
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public functions start with upper-case letter. */
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var EvoConvert = {
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MIN_PARAGRAPH_WIDTH : 5, // in characters
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MIN_OL_WIDTH : 6, // includes ". " at the end
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TAB_WIDTH : 8, // in characters
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ALIGN_LEFT : 0,
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ALIGN_CENTER : 1,
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ALIGN_RIGHT : 2,
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ALIGN_JUSTIFY : 3,
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NOWRAP_CHAR_START : "\x01",
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NOWRAP_CHAR_END : "\x02",
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E_HTML_LINK_TO_TEXT_NONE : 0,
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E_HTML_LINK_TO_TEXT_INLINE : 1,
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E_HTML_LINK_TO_TEXT_REFERENCE : 2,
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E_HTML_LINK_TO_TEXT_REFERENCE_WITHOUT_LABEL : 3,
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};
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/* EvoConvert.linkRequiresReference() function is added in the C code */
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EvoConvert.processAnchor = function(node, context)
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{
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var str;
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if (!node.innerText.includes(" ") && !node.innerText.includes("\n"))
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str = EvoConvert.NOWRAP_CHAR_START + node.innerText + EvoConvert.NOWRAP_CHAR_END;
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else
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str = node.innerText;
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if (context && node.href && EvoConvert.linkRequiresReference(node.href, node.innerText)) {
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if (context.link_to_text == EvoConvert.E_HTML_LINK_TO_TEXT_INLINE) {
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str += " <" + EvoConvert.NOWRAP_CHAR_START + node.href + EvoConvert.NOWRAP_CHAR_END + ">";
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} else if (context.link_to_text == EvoConvert.E_HTML_LINK_TO_TEXT_REFERENCE) {
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var index;
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for (index = 0; index < context.append_refs.length; index++) {
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if (context.append_refs[index].href == node.href)
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break;
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}
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if (index == context.append_refs.length)
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context.append_refs[context.append_refs.length] = { label : node.innerText, href : node.href };
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str += " [" + (index + 1) + "]";
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} else if (context.link_to_text == EvoConvert.E_HTML_LINK_TO_TEXT_REFERENCE_WITHOUT_LABEL) {
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var index;
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for (index = 0; index < context.append_refs.length; index++) {
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if (context.append_refs[index].href == node.href)
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break;
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}
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if (index == context.append_refs.length)
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context.append_refs[context.append_refs.length] = { href : node.href };
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str += " [" + (index + 1) + "]";
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}
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}
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return str;
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}
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EvoConvert.GetOLMaxLetters = function(type, levels)
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{
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if (type && type.toUpperCase() == "I") {
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if (levels < 2)
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return 1;
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if (levels < 3)
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return 2;
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if (levels < 8)
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return 3;
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if (levels < 18)
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return 4;
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if (levels < 28)
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return 5;
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if (levels < 38)
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return 6;
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if (levels < 88)
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return 7
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if (levels < 188)
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return 8;
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if (levels < 288)
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return 9;
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if (levels < 388)
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return 10;
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if (levels < 888)
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return 11;
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return 12;
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} else if (type && type.toUpperCase() == "A") {
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if (levels < 27)
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return 1;
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if (levels < 703)
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return 2;
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if (levels < 18279)
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return 3;
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return 4;
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} else {
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if (levels < 10)
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return 1;
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if (levels < 100)
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return 2;
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if (levels < 1000)
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return 3;
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if (levels < 10000)
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return 4;
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return 5;
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}
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}
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EvoConvert.getOLIndexValue = function(type, value)
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{
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var str = "";
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if (type == "A" || type == "a") { // alpha
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var add = type.charCodeAt(0);
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do {
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str = String.fromCharCode(((value - 1) % 26) + add) + str;
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value = Math.floor((value - 1) / 26);
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} while (value);
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} else if (type == "I" || type == "i") { // roman
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var base = "IVXLCDM";
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var b, r, add = 0;
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if (value > 3999) {
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str = "?";
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} else {
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if (type == "i")
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base = base.toLowerCase();
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for (b = 0; value > 0 && b < 7 - 1; b += 2, value = Math.floor(value / 10)) {
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r = value % 10;
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if (r != 0) {
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if (r < 4) {
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for (; r; r--)
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str = String.fromCharCode(base.charCodeAt(b) + add) + str;
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} else if (r == 4) {
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str = String.fromCharCode(base.charCodeAt(b + 1) + add) + str;
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str = String.fromCharCode(base.charCodeAt(b) + add) + str;
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} else if (r == 5) {
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str = String.fromCharCode(base.charCodeAt(b + 1) + add) + str;
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} else if (r < 9) {
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for (; r > 5; r--)
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str = String.fromCharCode(base.charCodeAt(b) + add) + str;
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str = String.fromCharCode(base.charCodeAt(b + 1) + add) + str;
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} else if (r == 9) {
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str = String.fromCharCode(base.charCodeAt(b + 2) + add) + str;
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str = String.fromCharCode(base.charCodeAt(b) + add) + str;
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}
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}
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}
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}
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} else { // numeric
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str = "" + value;
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}
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return str;
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}
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EvoConvert.getComputedOrNodeStyle = function(node)
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{
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if (!node)
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return null;
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var parent = node;
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while (parent && !(parent === document.body)) {
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parent = parent.parentElement;
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}
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if (parent)
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return window.getComputedStyle(node);
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return node.style;
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}
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EvoConvert.replaceList = function(element, tagName, normalDivWidth, context)
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{
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var ll, lists, type = null;
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if (tagName == "OL")
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type = "";
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lists = element.getElementsByTagName(tagName);
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for (ll = lists.length - 1; ll >= 0; ll--) {
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var list;
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list = lists.item(ll);
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if (!list)
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continue;
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var style = EvoConvert.getComputedOrNodeStyle(list), ltr, ii, prefixSuffix, indent;
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if (!style)
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style = list.style;
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ltr = !style || style.direction != "rtl";
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if (type == null) {
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var level = 0, parent = list;
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for (parent = list.parentElement; parent; parent = parent.parentElement) {
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if (parent.tagName == "UL" || parent.tagName == "OL")
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level++;
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}
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switch (level % 3) {
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default:
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case 0:
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prefixSuffix = " * ";
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break;
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case 1:
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prefixSuffix = " - ";
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break;
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case 2:
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prefixSuffix = " + ";
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break;
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}
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indent = 3;
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} else {
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type = list.getAttribute("type");
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if (!type)
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type = "";
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var nChildren = 0, child;
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for (ii = 0; ii < list.children.length; ii++) {
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child = list.children.item(ii);
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if (child.tagName == "LI")
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nChildren++;
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}
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prefixSuffix = ltr ? ". " : " .";
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indent = EvoConvert.GetOLMaxLetters(type, nChildren) + prefixSuffix.length;
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if (indent < EvoConvert.MIN_OL_WIDTH)
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indent = EvoConvert.MIN_OL_WIDTH;
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}
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if (list.hasAttribute("x-evo-extra-indent")) {
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var tmp = list.getAttribute("x-evo-extra-indent");
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if (tmp) {
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tmp = parseInt(tmp);
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if (!Number.isInteger(tmp))
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tmp = 0;
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} else {
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tmp = 0;
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}
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indent += tmp;
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}
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var liCount = 0;
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for (ii = 0; ii < list.children.length; ii++) {
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var child = list.children.item(ii), node;
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if (!child)
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continue;
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// nested lists
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if (child.tagName == "DIV" && child.hasAttribute("x-evo-extra-indent") && child.hasAttribute("x-evo-li-text")) {
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node = child.cloneNode(true);
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var tmp = child.getAttribute("x-evo-extra-indent");
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if (tmp) {
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tmp = parseInt(tmp);
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if (!Number.isInteger(tmp))
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tmp = 0;
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} else {
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tmp = 0;
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}
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node.setAttribute("x-evo-extra-indent", indent + tmp);
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tmp = node.getAttribute("x-evo-li-text");
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if (ltr)
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tmp = " ".repeat(indent) + tmp;
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else
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tmp = tmp + " ".repeat(indent);
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node.setAttribute("x-evo-li-text", tmp);
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} else if (child.tagName == "LI") {
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liCount++;
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var anchors = child.getElementsByTagName("A"), jj;
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for (jj = anchors.length - 1; jj >= 0; jj--) {
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var anchor = anchors[jj], str;
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str = EvoConvert.processAnchor(anchor, context);
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anchor.parentNode.insertBefore(document.createTextNode(str), anchor);
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anchor.remove();
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}
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node = document.createElement("DIV");
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if (list.style.width.endsWith("ch")) {
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var width = parseInt(list.style.width.slice(0, -2));
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if (Number.isInteger(width))
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node.style.width = "" + width + "ch";
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} else if (normalDivWidth > 0) {
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var width, needs;
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if (tagName == "UL") {
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needs = 3;
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} else {
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needs = EvoConvert.GetOLMaxLetters(list.getAttribute("type"), list.children.length) + 2; // length of ". " suffix
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if (needs < EvoConvert.MIN_OL_WIDTH)
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needs = EvoConvert.MIN_OL_WIDTH;
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}
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width = normalDivWidth - needs;
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if (width < EvoConvert.MIN_PARAGRAPH_WIDTH)
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width = EvoConvert.MIN_PARAGRAPH_WIDTH;
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node.style.width = "" + width + "ch";
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}
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node.style.textAlign = list.style.testAlign;
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node.style.direction = list.style.direction;
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node.style.marginLeft = list.style.marginLeft;
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node.style.marginRight = list.style.marginRight;
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node.setAttribute("x-evo-extra-indent", indent);
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node.innerText = child.innerText;
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if (type == null) {
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node.setAttribute("x-evo-li-text", prefixSuffix);
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} else {
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var prefix;
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prefix = EvoConvert.getOLIndexValue(type, liCount);
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while (prefix.length + 2 /* prefixSuffix.length */ < indent) {
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prefix = ltr ? " " + prefix : prefix + " ";
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}
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node.setAttribute("x-evo-li-text", ltr ? prefix + prefixSuffix : prefixSuffix + prefix);
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}
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} else {
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node = child.cloneNode(true);
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if (node.tagName == "UL" || node.tagName == "OL") {
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var tmp = child.getAttribute("x-evo-extra-indent");
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if (tmp) {
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tmp = parseInt(tmp);
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if (!Number.isInteger(tmp))
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tmp = 0;
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} else {
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tmp = 0;
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}
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node.setAttribute("x-evo-extra-indent", indent + tmp);
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}
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}
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list.parentNode.insertBefore(node, list);
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}
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list.parentNode.removeChild(list);
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}
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}
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EvoConvert.calcLineLetters = function(line)
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{
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var len;
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if (line.search("\t") >= 0) {
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var jj;
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len = 0;
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for (jj = 0; jj < line.length; jj++) {
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if (line.charAt(jj) == "\t") {
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len = len - (len % EvoConvert.TAB_SIZE) + EvoConvert.TAB_SIZE;
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} else {
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len++;
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}
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}
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} else {
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len = line.length;
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}
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return len;
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}
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EvoConvert.getQuotePrefix = function(quoteLevel, ltr)
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{
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var prefix = "";
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if (quoteLevel > 0) {
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prefix = ltr ? "> " : " <";
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prefix = prefix.repeat(quoteLevel);
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}
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return prefix;
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}
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EvoConvert.formatParagraph = function(str, ltr, align, indent, whiteSpace, wrapWidth, extraIndent, liText, quoteLevel)
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{
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if (!str || str == "")
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return liText ? liText : str;
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var lines = [], ii;
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// wrap the string first
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if (wrapWidth > 0) {
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var worker = {
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collapseWhiteSpace : whiteSpace != "pre" && whiteSpace != "pre-wrap",
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collapseEndingWhiteSpace : whiteSpace != "pre",
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canWrap : whiteSpace != "nowrap",
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charWrap : whiteSpace == "pre",
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inAnchor : 0,
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ignoreLineLetters : 0, // used for EvoConvert.NOWRAP_CHAR_START and EvoConvert.NOWRAP_CHAR_END, which should be skipped in width calculation
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useWrapWidth : wrapWidth,
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spacesFrom : -1, // in 'str'
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lastWrapableChar : -1, // in this->line
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lineLetters : 0,
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line : "",
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maybeRecalcIgnoreLineLetters : function() {
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if (this.ignoreLineLetters) {
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var ii, len = this.line.length, chr;
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this.ignoreLineLetters = 0;
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for (ii = 0; ii < len; ii++) {
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chr = this.line[ii];
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if (chr == EvoConvert.NOWRAP_CHAR_START || chr == EvoConvert.NOWRAP_CHAR_END)
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this.ignoreLineLetters++;
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}
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}
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},
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mayConsumeWhitespaceAfterWrap : function(str, ii) {
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return ii > 0 && this.line == "" && str[ii - 1] == EvoConvert.NOWRAP_CHAR_END;
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},
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isInUnwrapPart : function() {
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if (this.inAnchor)
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return true;
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if (this.line[0] == EvoConvert.NOWRAP_CHAR_START)
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return this.line.indexOf(EvoConvert.NOWRAP_CHAR_END) < 0;
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return false;
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},
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shouldWrap : function(nextChar) {
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return this.canWrap && (!this.collapseWhiteSpace || nextChar != '\n') &&
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(!this.isInUnwrapPart() || this.lastWrapableChar != -1) && (this.lineLetters - this.ignoreLineLetters > this.useWrapWidth || (
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((!this.charWrap && (nextChar == " " || nextChar == "\t") && this.lineLetters - this.ignoreLineLetters > this.useWrapWidth) ||
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((this.charWrap || (nextChar != " " && nextChar != "\t")) && this.lineLetters - this.ignoreLineLetters == this.useWrapWidth)) && (
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this.lastWrapableChar == -1/* || this.lastWrapableChar == this.line.length*/)));
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},
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commitSpaces : function(ii) {
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if (this.spacesFrom != -1 && (!this.canWrap || this.line.length - this.ignoreLineLetters <= this.useWrapWidth)) {
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var spaces;
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spaces = ii - this.spacesFrom;
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if (this.canWrap && this.line.length - this.ignoreLineLetters + spaces > this.useWrapWidth)
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spaces = this.useWrapWidth - this.line.length + this.ignoreLineLetters;
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if (!this.canWrap || (this.line.length - this.ignoreLineLetters + spaces <= this.useWrapWidth) && spaces >= 0) {
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if (this.collapseWhiteSpace && (!extraIndent || lines.length))
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this.line += " ";
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else
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this.line += " ".repeat(spaces);
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}
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this.spacesFrom = -1;
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this.lastWrapableChar = this.line.length;
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} else if (this.spacesFrom != -1) {
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this.lastWrapableChar = this.line.length;
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}
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},
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commit : function(ii, force) {
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this.commitSpaces(ii);
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var didWrap = false;
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if (this.canWrap && this.lastWrapableChar != -1 && this.lineLetters - this.ignoreLineLetters > this.useWrapWidth) {
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lines[lines.length] = this.line.substr(0, this.lastWrapableChar);
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this.line = this.line.substr(this.lastWrapableChar);
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this.maybeRecalcIgnoreLineLetters();
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didWrap = true;
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} else if (!this.isInUnwrapPart() && this.useWrapWidth != -1 && this.lineLetters - this.ignoreLineLetters > this.useWrapWidth) {
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var jj;
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if (this.charWrap) {
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var subLineLetters = 0, ignoreSubLineLetters = 0, chr;
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for(jj = 0; jj < this.line.length; jj++) {
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chr = this.line.charAt(jj);
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if (chr == "\t") {
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|
subLineLetters = subLineLetters - ((subLineLetters - ignoreSubLineLetters) % EvoConvert.TAB_SIZE) + EvoConvert.TAB_SIZE;
|
|
} else {
|
|
subLineLetters++;
|
|
}
|
|
|
|
if (chr == EvoConvert.NOWRAP_CHAR_START || chr == EvoConvert.NOWRAP_CHAR_END)
|
|
ignoreSubLineLetters++;
|
|
|
|
if (subLineLetters - ignoreSubLineLetters >= this.useWrapWidth)
|
|
break;
|
|
}
|
|
} else {
|
|
jj = this.line.length;
|
|
}
|
|
|
|
lines[lines.length] = this.line.substr(0, jj);
|
|
this.line = this.line.substr(jj);
|
|
this.maybeRecalcIgnoreLineLetters();
|
|
didWrap = true;
|
|
} else {
|
|
lines[lines.length] = this.line;
|
|
this.line = "";
|
|
this.ignoreLineLetters = 0;
|
|
}
|
|
|
|
if (this.canWrap && this.collapseEndingWhiteSpace && didWrap && lines[lines.length - 1].endsWith(" ")) {
|
|
if (lines[lines.length - 1].length == 1)
|
|
lines.length = lines.length - 1;
|
|
else
|
|
lines[lines.length - 1] = lines[lines.length - 1].substr(0, lines[lines.length - 1].length - 1);
|
|
}
|
|
|
|
if (force && this.line) {
|
|
lines[lines.length] = this.line;
|
|
this.line = "";
|
|
this.ignoreLineLetters = 0;
|
|
}
|
|
|
|
this.lineLetters = this.canWrap ? EvoConvert.calcLineLetters(this.line) : this.line.length;
|
|
this.spacesFrom = -1;
|
|
this.lastWrapableChar = -1;
|
|
}
|
|
};
|
|
|
|
if (worker.useWrapWidth < EvoConvert.MIN_PARAGRAPH_WIDTH)
|
|
worker.useWrapWidth = EvoConvert.MIN_PARAGRAPH_WIDTH;
|
|
|
|
var chr, isHighSurrogate = false;
|
|
|
|
for (ii = 0; ii < str.length; ii += 1 + (isHighSurrogate ? 1 : 0)) {
|
|
// surrogate are two characters "high+low"; high: 0xD800 - 0xDBFF; low: 0xDC00 - 0xDFFF
|
|
// and cannot split after the high surrogate, because that would break the character encoding
|
|
isHighSurrogate = str.charCodeAt(ii) >= 0xd800 && str.charCodeAt(ii) <= 0xdbff;
|
|
if (isHighSurrogate)
|
|
chr = str.substr(ii, 2);
|
|
else
|
|
chr = str.charAt(ii);
|
|
|
|
if (chr == EvoConvert.NOWRAP_CHAR_START)
|
|
worker.inAnchor++;
|
|
|
|
if (chr == "\n") {
|
|
if (!worker.mayConsumeWhitespaceAfterWrap(str, ii))
|
|
worker.commit(ii, true);
|
|
} else if (!worker.charWrap && !worker.collapseWhiteSpace && chr == "\t") {
|
|
if (worker.shouldWrap(str[ii + 1]))
|
|
worker.commit(ii, false);
|
|
else
|
|
worker.commitSpaces(ii);
|
|
|
|
var add = chr; // this expands the tab, instead of leaving it '\t'... " ".repeat(EvoConvert.TAB_WIDTH - ((worker.lineLetters - worker.ignoreLineLetters) % EvoConvert.TAB_WIDTH));
|
|
|
|
worker.lineLetters = worker.lineLetters - ((worker.lineLetters - worker.ignoreLineLetters) % EvoConvert.TAB_WIDTH) + EvoConvert.TAB_WIDTH;
|
|
|
|
if (worker.shouldWrap(str[ii + 1]))
|
|
worker.commit(ii, false);
|
|
|
|
worker.line += add;
|
|
worker.lineLetters += add.length;
|
|
} else if (!worker.charWrap && (chr == " " || chr == "\t")) {
|
|
var setSpacesFrom = false;
|
|
|
|
if (chr == "\t") {
|
|
worker.lineLetters = worker.lineLetters - ((worker.lineLetters - worker.ignoreLineLetters) % EvoConvert.TAB_WIDTH) + EvoConvert.TAB_WIDTH;
|
|
setSpacesFrom = true;
|
|
} else if ((worker.spacesFrom == -1 && worker.line != "") || (!worker.collapseWhiteSpace && !worker.mayConsumeWhitespaceAfterWrap(str, ii))) {
|
|
worker.lineLetters++;
|
|
setSpacesFrom = true;
|
|
}
|
|
|
|
// all spaces at the end of paragraph line are ignored
|
|
if (setSpacesFrom && worker.spacesFrom == -1)
|
|
worker.spacesFrom = ii;
|
|
} else {
|
|
worker.commitSpaces(ii);
|
|
worker.line += chr;
|
|
|
|
if (chr == "\t")
|
|
worker.lineLetters = worker.lineLetters - ((worker.lineLetters - worker.ignoreLineLetters) % EvoConvert.TAB_WIDTH) + EvoConvert.TAB_WIDTH;
|
|
else
|
|
worker.lineLetters += chr.length;
|
|
|
|
if (chr == EvoConvert.NOWRAP_CHAR_START || chr == EvoConvert.NOWRAP_CHAR_END)
|
|
worker.ignoreLineLetters++;
|
|
|
|
if (chr == EvoConvert.NOWRAP_CHAR_END && worker.inAnchor)
|
|
worker.inAnchor--;
|
|
|
|
if (worker.shouldWrap(str[ii + 1]))
|
|
worker.commit(ii, false);
|
|
|
|
if (chr == "-" && worker.line.length && !worker.inAnchor)
|
|
worker.lastWrapableChar = worker.line.length;
|
|
else if (chr == EvoConvert.NOWRAP_CHAR_START && quoteLevel > 0 && worker.lastWrapableChar < 0 && worker.inAnchor <= 1 && worker.line.length > 1) {
|
|
worker.lastWrapableChar = worker.line.length;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (worker.line.length || worker.spacesFrom != -1 || !lines.length) {
|
|
worker.commit(ii, false);
|
|
}
|
|
} else {
|
|
if (str.endsWith("\n"))
|
|
str = str.substr(0, str.length - 1);
|
|
|
|
lines = str.split("\n");
|
|
}
|
|
|
|
var extraIndentStr = extraIndent > 0 ? " ".repeat(extraIndent) : null;
|
|
|
|
if (wrapWidth <= 0) {
|
|
for (ii = 0; ii < lines.length; ii++) {
|
|
var len = EvoConvert.calcLineLetters(lines[ii]);
|
|
|
|
if (wrapWidth < len)
|
|
wrapWidth = len;
|
|
}
|
|
}
|
|
|
|
str = "";
|
|
|
|
for (ii = 0; ii < lines.length; ii++) {
|
|
var line = lines[ii];
|
|
|
|
if ((!ltr && align == EvoConvert.ALIGN_LEFT) ||
|
|
(ltr && align == EvoConvert.ALIGN_RIGHT)) {
|
|
var len = EvoConvert.calcLineLetters(line);
|
|
|
|
if (len < wrapWidth) {
|
|
var add = " ".repeat(wrapWidth - len);
|
|
|
|
if (ltr)
|
|
line = add + line;
|
|
else
|
|
line = line + add;
|
|
}
|
|
} else if (align == EvoConvert.ALIGN_CENTER) {
|
|
var len = EvoConvert.calcLineLetters(line);
|
|
|
|
if (len < wrapWidth) {
|
|
var add = " ".repeat((wrapWidth - len) / 2);
|
|
|
|
if (ltr)
|
|
line = add + line;
|
|
else
|
|
line = line + add;
|
|
}
|
|
} else if (align == EvoConvert.ALIGN_JUSTIFY && ii + 1 < lines.length) {
|
|
var len = EvoConvert.calcLineLetters(line);
|
|
|
|
if (len < wrapWidth) {
|
|
var words = line.split(" ");
|
|
|
|
if (words.length > 1) {
|
|
var nAdd = (wrapWidth - len);
|
|
var add = " ".repeat(nAdd / (words.length - 1) >= 1 ? nAdd / (words.length - 1) : nAdd), jj;
|
|
|
|
for (jj = 0; jj < words.length - 1 && nAdd > 0; jj++) {
|
|
words[jj] = words[jj] + add;
|
|
nAdd -= add.length;
|
|
|
|
if (nAdd > 0 && jj + 2 >= words.length) {
|
|
words[jj] = " ".repeat(nAdd) + words[jj];
|
|
}
|
|
}
|
|
|
|
line = words[0];
|
|
|
|
for (jj = 1; jj < words.length; jj++) {
|
|
line = line + " " + words[jj];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ii && liText) {
|
|
if (ltr)
|
|
line = liText + line;
|
|
else
|
|
line = line + liText;
|
|
} else if (extraIndentStr && ii > 0) {
|
|
if (ltr)
|
|
line = extraIndentStr + line;
|
|
else
|
|
line = line + extraIndentStr;
|
|
|
|
}
|
|
|
|
if (indent != "") {
|
|
if (ltr && align != EvoConvert.ALIGN_RIGHT)
|
|
line = indent + line;
|
|
else
|
|
line = line + indent;
|
|
}
|
|
|
|
str += line + "\n";
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
EvoConvert.ImgToText = function(img)
|
|
{
|
|
if (!img)
|
|
return "";
|
|
|
|
var txt;
|
|
|
|
txt = img.alt;
|
|
|
|
return txt ? txt : "";
|
|
}
|
|
|
|
EvoConvert.appendNodeText = function(node, str, text)
|
|
{
|
|
/* This breaks "-- <br>", thus disable it for now. Cannot distinguish from test 70 of /EWebView/ConvertToPlain.
|
|
|
|
if (node && node.parentElement && text.startsWith('\n') && str.endsWith(" ")) {
|
|
var whiteSpace = "normal";
|
|
|
|
if (node.parentElement)
|
|
whiteSpace = window.getComputedStyle(node.parentElement).whiteSpace;
|
|
|
|
if (!whiteSpace || whiteSpace == "normal") {
|
|
return str.substr(0, str.length - 1) + text;
|
|
}
|
|
} */
|
|
|
|
return str + text;
|
|
}
|
|
|
|
EvoConvert.extractElemText = function(elem, normalDivWidth, quoteLevel, context)
|
|
{
|
|
if (!elem)
|
|
return "";
|
|
|
|
if (!elem.childNodes.length)
|
|
return elem.innerText;
|
|
|
|
var str = "", ii;
|
|
|
|
for (ii = 0; ii < elem.childNodes.length; ii++) {
|
|
var node = elem.childNodes.item(ii);
|
|
|
|
if (!node)
|
|
continue;
|
|
|
|
str = EvoConvert.appendNodeText(node, str, EvoConvert.processNode(node, normalDivWidth, quoteLevel, context));
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
EvoConvert.mergeConsecutiveSpaces = function(str)
|
|
{
|
|
if (str.indexOf(" ") >= 0) {
|
|
var words = str.split(" "), ii, word;
|
|
|
|
str = "";
|
|
|
|
for (ii = 0; ii < words.length; ii++) {
|
|
word = words[ii];
|
|
|
|
if (word) {
|
|
if (ii)
|
|
str += " ";
|
|
|
|
str += word;
|
|
}
|
|
}
|
|
|
|
if (!words[words.length - 1])
|
|
str += " ";
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
EvoConvert.RemoveInsignificantNewLines = function(node, stripSingleSpace)
|
|
{
|
|
var str = "";
|
|
|
|
if (node && node.nodeType == node.TEXT_NODE) {
|
|
var has_rnt;
|
|
str = node.nodeValue;
|
|
|
|
has_rnt = str.indexOf("\r") >= 0 ||
|
|
str.indexOf("\n") >= 0 ||
|
|
str.indexOf("\t") >= 0;
|
|
if (has_rnt || str.indexOf(" ") >= 0) {
|
|
var whiteSpace = "normal";
|
|
|
|
if (node.parentElement)
|
|
whiteSpace = window.getComputedStyle(node.parentElement).whiteSpace;
|
|
|
|
if (whiteSpace == "pre-line") {
|
|
str = EvoConvert.mergeConsecutiveSpaces(str.replace(/\t/g, " "));
|
|
} else if (!whiteSpace || whiteSpace == "normal" || whiteSpace == "nowrap") {
|
|
if (str == "\n" || str == "\r" || str == "\r\n") {
|
|
var previousSibling = node.previousElementSibling;
|
|
if (stripSingleSpace || (previousSibling && (previousSibling.tagName == "BR" ||
|
|
previousSibling.tagName == "DIV" || previousSibling.tagName == "P" ||
|
|
previousSibling.tagName == "BODY")))
|
|
str = "";
|
|
} else if (has_rnt) {
|
|
if ((!node.previousSibling || node.previousSibling.tagName) && (str[0] == '\r' || str[0] == '\n')) {
|
|
var ii;
|
|
|
|
for (ii = 0; str[ii] == '\n' || str[ii] == '\r'; ii++) {
|
|
// do nothing, just skip all leading insignificant new lines
|
|
}
|
|
|
|
str = str.substr(ii);
|
|
}
|
|
|
|
if (str.length > 0 && (!node.nextSibling || node.nextSibling.tagName) && (str[str.length - 1] == '\r' || str[str.length - 1] == '\n')) {
|
|
var ii;
|
|
|
|
for (ii = str.length - 1; ii >= 0 && (str[ii] == '\n' || str[ii] == '\r'); ii--) {
|
|
// do nothing, just skip all trailing insignificant new lines
|
|
}
|
|
|
|
str = str.substr(0, ii + 1);
|
|
}
|
|
|
|
if (str.length == 0 && stripSingleSpace === false)
|
|
str = " ";
|
|
|
|
str = EvoConvert.mergeConsecutiveSpaces(str.replace(/\t/g, " ").replace(/\r/g, " ").replace(/\n/g, " "));
|
|
|
|
if ((!whiteSpace || whiteSpace == "normal") && str == " ") {
|
|
if (stripSingleSpace || (!node.previousElementSibling && !node.nextElementSibling &&
|
|
node.parentElement && (node.parentElement.tagName == "DIV" ||
|
|
node.parentElement.tagName == "DIV" || node.parentElement.tagName == "P" ||
|
|
node.parentElement.tagName == "PRE" || node.parentElement.tagName == "BODY"))) {
|
|
str = "";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
EvoConvert.processNode = function(node, normalDivWidth, quoteLevel, context)
|
|
{
|
|
var str = "";
|
|
|
|
if (node.nodeType == node.TEXT_NODE) {
|
|
str = EvoConvert.RemoveInsignificantNewLines(node, false);
|
|
} else if (node.nodeType == node.ELEMENT_NODE) {
|
|
if (node.hidden ||
|
|
node.tagName == "STYLE" ||
|
|
node.tagName == "META" ||
|
|
(node.tagName == "SPAN" && node.classList.contains("-x-evo-quoted")))
|
|
return str;
|
|
|
|
var style = EvoConvert.getComputedOrNodeStyle(node), ltr, align, indent, whiteSpace;
|
|
|
|
if (!style)
|
|
style = node.style;
|
|
|
|
ltr = !style || style.direction != "rtl";
|
|
|
|
align = style ? style.textAlign : "";
|
|
if (!align || align == "")
|
|
align = node.style.textAlign;
|
|
if (align)
|
|
align = align.toLowerCase();
|
|
if (!align)
|
|
align = "";
|
|
if (align == "" || align == "start")
|
|
align = ltr ? "left" : "right";
|
|
|
|
if (align == "center")
|
|
align = EvoConvert.ALIGN_CENTER;
|
|
else if (align == "right")
|
|
align = EvoConvert.ALIGN_RIGHT;
|
|
else if (align == "justify")
|
|
align = EvoConvert.ALIGN_JUSTIFY;
|
|
else
|
|
align = EvoConvert.ALIGN_LEFT;
|
|
|
|
// mixed indent and opposite text align does nothing
|
|
if ((ltr && align == EvoConvert.ALIGN_RIGHT) ||
|
|
(!ltr && align == EvoConvert.ALIGN_LEFT)) {
|
|
indent = "";
|
|
} else {
|
|
// computed style's 'indent' uses pixels, not characters
|
|
indent = ltr ? node.style.marginLeft : node.style.marginRight;
|
|
}
|
|
|
|
if (indent && indent.endsWith("ch")) {
|
|
indent = parseInt(indent.slice(0, -2));
|
|
if (!Number.isInteger(indent) || indent < 0)
|
|
indent = 0;
|
|
} else {
|
|
indent = 0;
|
|
}
|
|
|
|
if (indent > 0)
|
|
indent = " ".repeat(indent);
|
|
else
|
|
indent = "";
|
|
|
|
whiteSpace = style ? style.whiteSpace.toLowerCase() : "";
|
|
|
|
if (node.tagName == "DIV" || node.tagName == "P") {
|
|
var liText, extraIndent, width, useDefaultWidth = false;
|
|
|
|
liText = node.getAttribute("x-evo-li-text");
|
|
if (!liText)
|
|
liText = "";
|
|
|
|
extraIndent = node.getAttribute("x-evo-extra-indent");
|
|
extraIndent = extraIndent ? parseInt(extraIndent, 10) : 0;
|
|
if (!Number.isInteger(extraIndent)) {
|
|
extraIndent = 0;
|
|
}
|
|
|
|
width = node.style.width;
|
|
if (width && width.endsWith("ch")) {
|
|
width = parseInt(width.slice(0, -2));
|
|
|
|
if (!Number.isInteger(width) || width < 0)
|
|
useDefaultWidth = true;
|
|
} else {
|
|
useDefaultWidth = true;
|
|
}
|
|
|
|
var childrenWillWrap = true;
|
|
if (!node.classList.contains("gmail_quote")) {
|
|
childrenWillWrap = node.childNodes.length > 0 && liText == "";
|
|
var ii;
|
|
for (ii = 0; childrenWillWrap && ii < node.childNodes.length; ii++) {
|
|
var child = node.childNodes.item(ii);
|
|
childrenWillWrap = (child.nodeType == child.ELEMENT_NODE &&
|
|
((child.tagName == "DIV" && !child.getAttribute("x-evo-li-text")) ||
|
|
child.tagName == "P" ||
|
|
child.tagName == "PRE" ||
|
|
child.tagName == "BLOCKQUOTE" ||
|
|
child.tagName == "BR")) ||
|
|
(child.nodeType == child.TEXT_NODE &&
|
|
EvoConvert.RemoveInsignificantNewLines(child, true).trim().length == 0);
|
|
}
|
|
}
|
|
|
|
if (childrenWillWrap) {
|
|
width = -1;
|
|
} else if (useDefaultWidth && normalDivWidth > 0) {
|
|
width = normalDivWidth - (quoteLevel * 2);
|
|
|
|
if (width < EvoConvert.MIN_PARAGRAPH_WIDTH)
|
|
width = EvoConvert.MIN_PARAGRAPH_WIDTH;
|
|
}
|
|
|
|
str = EvoConvert.formatParagraph(EvoConvert.extractElemText(node, normalDivWidth, quoteLevel, context), ltr, align, indent, whiteSpace, width, extraIndent, liText, quoteLevel);
|
|
|
|
if (!liText && node.parentElement && (node.parentElement.tagName == "DIV" || node.parentElement.tagName == "P") &&
|
|
style.display == "block" && str != "" && node.previousSibling &&
|
|
((node.previousSibling.nodeType == node.ELEMENT_NODE && node.previousSibling.tagName != "DIV" && node.previousSibling.tagName != "P" && node.previousSibling.tagName != "BR") ||
|
|
(node.previousSibling.nodeType == node.TEXT_NODE && EvoConvert.RemoveInsignificantNewLines(node.previousSibling, true) != ""))) {
|
|
str = "\n" + str;
|
|
}
|
|
} else if (node.tagName == "PRE") {
|
|
str = EvoConvert.formatParagraph(EvoConvert.extractElemText(node, normalDivWidth, quoteLevel, context), ltr, align, indent, "pre", -1, 0, "", quoteLevel);
|
|
} else if (node.tagName == "BR") {
|
|
// ignore new-lines added by wrapping, treat them as spaces
|
|
if (node.classList.contains("-x-evo-wrap-br")) {
|
|
if (node.hasAttribute("x-evo-is-space"))
|
|
str += " ";
|
|
} else {
|
|
str = "\n";
|
|
}
|
|
} else if (node.tagName == "IMG") {
|
|
str = EvoConvert.ImgToText(node);
|
|
} else if (node.tagName == "A") {
|
|
str = EvoConvert.processAnchor(node, context);
|
|
} else {
|
|
var isBlockquote = node.tagName == "BLOCKQUOTE";
|
|
|
|
str = EvoConvert.extractElemText(node, normalDivWidth, quoteLevel + (isBlockquote ? 1 : 0), context);
|
|
|
|
if (isBlockquote) {
|
|
var ii, lines = str.split("\n"), prefix, suffix;
|
|
|
|
prefix = ltr ? EvoConvert.getQuotePrefix(1, ltr) : "";
|
|
suffix = ltr ? "" : EvoConvert.getQuotePrefix(1, ltr);
|
|
|
|
str = "";
|
|
|
|
for (ii = 0; ii < lines.length; ii++) {
|
|
if (ii + 1 == lines.length && !lines[ii])
|
|
break;
|
|
|
|
str += prefix + lines[ii] + suffix + "\n";
|
|
}
|
|
}
|
|
|
|
if ((!isBlockquote || !str.endsWith("\n")) &&
|
|
str != "\n" && ((style && style.display == "block") || node.tagName == "ADDRESS" || node.tagName == "TR")) {
|
|
str += "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Converts element and its children to plain text. Any <div>,<ul>,<ol>, as an immediate child
|
|
* of the element, is wrapped to upto normalDivWidth characters, if it's defined and greater
|
|
* than EvoConvert.MIN_PARAGRAPH_WIDTH.
|
|
*
|
|
* The link_to_text should be one of EvoConvert.E_HTML_LINK_TO_TEXT_... constants, if not
|
|
* defined the 'EvoConvert.E_HTML_LINK_TO_TEXT_NONE' is assumed.
|
|
*/
|
|
EvoConvert.ToPlainText = function(element, normalDivWidth, link_to_text)
|
|
{
|
|
if (!element)
|
|
return null;
|
|
|
|
if (element.tagName == "HTML") {
|
|
var bodys;
|
|
|
|
bodys = element.getElementsByTagName("BODY");
|
|
|
|
if (bodys.length == 1)
|
|
element = bodys.item(0);
|
|
}
|
|
|
|
if (!element)
|
|
return null;
|
|
|
|
if (!normalDivWidth)
|
|
normalDivWidth = -1;
|
|
|
|
var disconnectFromHead = false;
|
|
|
|
if (!element.isConnected) {
|
|
// this is needed to be able to use window.getComputedStyle()
|
|
document.head.appendChild(element);
|
|
disconnectFromHead = true;
|
|
}
|
|
|
|
var context = {
|
|
link_to_text : link_to_text,
|
|
append_refs : []
|
|
};
|
|
|
|
try {
|
|
var uls, ols, str = "", ii;
|
|
|
|
uls = element.getElementsByTagName("UL");
|
|
ols = element.getElementsByTagName("OL");
|
|
|
|
if (uls.length > 0 || ols.length > 0) {
|
|
element = element.cloneNode(true);
|
|
|
|
if (uls.length)
|
|
EvoConvert.replaceList(element, "UL", normalDivWidth, context);
|
|
|
|
if (ols.length)
|
|
EvoConvert.replaceList(element, "OL", normalDivWidth, context);
|
|
}
|
|
|
|
for (ii = 0; ii < element.childNodes.length; ii++) {
|
|
var node = element.childNodes.item(ii);
|
|
|
|
if (!node)
|
|
continue;
|
|
|
|
str = EvoConvert.appendNodeText(node, str, EvoConvert.processNode(node, normalDivWidth, 0, context));
|
|
}
|
|
|
|
if (context.append_refs.length > 0) {
|
|
if (!str.endsWith("\n"))
|
|
str += "\n";
|
|
str += "\n";
|
|
|
|
for (ii = 0; ii < context.append_refs.length; ii++) {
|
|
var prefix = "[" + (ii + 1) + "] ";
|
|
if (context.append_refs[ii].label) {
|
|
var indent = prefix.length;
|
|
prefix += context.append_refs[ii].label.replace(/\r/g, "").replace(/\n/g, " ");
|
|
if (normalDivWidth && normalDivWidth > 0 &&
|
|
normalDivWidth < (prefix.length + 1 + context.append_refs[ii].href.length)) {
|
|
prefix += "\n" + " ".repeat(indent);
|
|
} else {
|
|
prefix += " ";
|
|
}
|
|
}
|
|
str += prefix + context.append_refs[ii].href + "\n";
|
|
}
|
|
}
|
|
} finally {
|
|
if (disconnectFromHead)
|
|
document.head.removeChild(element);
|
|
}
|
|
|
|
// to not add empty lines at the end of the text on re-editing
|
|
if (str.endsWith("\n\n"))
|
|
str = str.substr(0, str.length - 1);
|
|
|
|
// remove EvoConvert.NOWRAP_CHAR_START and EvoConvert.NOWRAP_CHAR_END from the result
|
|
return str.replace(/\x01/g, "").replace(/\x02/g, "");
|
|
}
|