mirror of
https://github.com/RetroShare/RetroShare.git
synced 2024-10-01 02:35:48 -04:00
30c4a6ef93
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6470 b45a01b8-16f6-495d-af2f-9b41ad6348cc
805 lines
24 KiB
C++
805 lines
24 KiB
C++
/****************************************************************
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* This file is distributed under the following license:
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*
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* Copyright (c) 2010, Thomas Kister
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#include <QApplication>
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#include <QTextBrowser>
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#include <QtXml>
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#include <QBuffer>
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#include <QMessageBox>
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#include <qmath.h>
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#include "HandleRichText.h"
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#include "gui/RetroShareLink.h"
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#include "util/ObjectPainter.h"
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#include <iostream>
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/**
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* The type of embedding we'd like to do
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*/
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enum EmbeddedType
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{
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Ahref, ///< into <a></a>
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Img ///< into <img/>
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};
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/**
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* Base class for storing information about a given kind of embedding.
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*
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* Its only constructor is protected so it is impossible to instantiate it, and
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* at the same time derived classes have to provide a type.
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*/
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class EmbedInHtml
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{
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protected:
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EmbedInHtml(EmbeddedType newType) : myType(newType) {}
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public:
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const EmbeddedType myType;
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QRegExp myRE;
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};
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/**
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* This class is used to store information for embedding links into <a></a> tags.
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*/
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class EmbedInHtmlAhref : public EmbedInHtml
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{
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public:
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EmbedInHtmlAhref() : EmbedInHtml(Ahref)
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{
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myRE.setPattern("(\\bretroshare://[^\\s]*)|(\\bhttps?://[^\\s]*)|(\\bfile://[^\\s]*)|(\\bwww\\.[^\\s]*)");
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}
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};
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/**
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* This class is used to store information for embedding smileys into <img/> tags.
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*
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* By default the QRegExp the variables are empty, which means it must be
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* filled at runtime, typically when the smileys set is loaded. It can be
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* either done by hand or by using one of the helper methods available.
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*
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* Note: The QHash uses only *one* smiley per key (unlike soon-to-be-upgraded
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* code out there).
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*/
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class EmbedInHtmlImg : public EmbedInHtml
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{
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public:
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EmbedInHtmlImg() : EmbedInHtml(Img) {}
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QHash<QString,QString> smileys;
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};
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/* global instance for embedding emoticons */
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static EmbedInHtmlImg defEmbedImg;
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RsHtml::RsHtml()
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{
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}
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void RsHtml::initEmoticons(const QHash< QString, QString >& hash)
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{
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QString newRE;
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for(QHash<QString,QString>::const_iterator it = hash.begin(); it != hash.end(); ++it)
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foreach(QString smile, it.key().split("|")) {
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if (smile.isEmpty()) {
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continue;
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}
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defEmbedImg.smileys.insert(smile, it.value());
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newRE += "(" + QRegExp::escape(smile) + ")|";
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}
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newRE.chop(1); // remove last |
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defEmbedImg.myRE.setPattern(newRE);
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}
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bool RsHtml::canReplaceAnchor(QDomDocument &/*doc*/, QDomElement &/*element*/, const RetroShareLink &link)
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{
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switch (link.type()) {
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case RetroShareLink::TYPE_UNKNOWN:
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case RetroShareLink::TYPE_FILE:
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case RetroShareLink::TYPE_PERSON:
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case RetroShareLink::TYPE_FORUM:
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case RetroShareLink::TYPE_CHANNEL:
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case RetroShareLink::TYPE_SEARCH:
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case RetroShareLink::TYPE_MESSAGE:
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case RetroShareLink::TYPE_EXTRAFILE:
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case RetroShareLink::TYPE_PRIVATE_CHAT:
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case RetroShareLink::TYPE_PUBLIC_MSG:
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// not yet implemented
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break;
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case RetroShareLink::TYPE_CERTIFICATE:
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return true;
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}
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return false;
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}
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void RsHtml::anchorTextForImg(QDomDocument &/*doc*/, QDomElement &/*element*/, const RetroShareLink &link, QString &text)
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{
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text = link.niceName();
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}
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void RsHtml::anchorStylesheetForImg(QDomDocument &/*doc*/, QDomElement &/*element*/, const RetroShareLink &link, QString &styleSheet)
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{
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switch (link.type()) {
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case RetroShareLink::TYPE_UNKNOWN:
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case RetroShareLink::TYPE_FILE:
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case RetroShareLink::TYPE_PERSON:
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case RetroShareLink::TYPE_FORUM:
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case RetroShareLink::TYPE_CHANNEL:
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case RetroShareLink::TYPE_SEARCH:
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case RetroShareLink::TYPE_MESSAGE:
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case RetroShareLink::TYPE_EXTRAFILE:
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case RetroShareLink::TYPE_PRIVATE_CHAT:
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case RetroShareLink::TYPE_PUBLIC_MSG:
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// not yet implemented
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break;
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case RetroShareLink::TYPE_CERTIFICATE:
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styleSheet = "QPushButton{ border-image: url(:/images/btn_blue.png) ;border-width: 4;padding: 0px 6px;font-size: 12px;color: white;} QPushButton:hover{ border-image: url(:/images/btn_blue_hover.png) ;}";
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break;
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}
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}
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void RsHtml::replaceAnchorWithImg(QDomDocument &doc, QDomElement &element, QTextDocument *textDocument, const RetroShareLink &link)
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{
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if (!textDocument) {
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return;
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}
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if (!link.valid()) {
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return;
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}
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if (element.childNodes().length() != 1) {
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return;
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}
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if (!canReplaceAnchor(doc, element, link)) {
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return;
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}
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QString imgText;
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anchorTextForImg(doc, element, link, imgText);
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QString styleSheet;
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anchorStylesheetForImg(doc, element, link, styleSheet);
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QDomNode childNode = element.firstChild();
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/* build resource name */
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QString resourceName = QString("%1_%2.png").arg(link.type()).arg(imgText);
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if (!textDocument->resource(QTextDocument::ImageResource, QUrl(resourceName)).isValid()) {
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/* draw a button on a pixmap */
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QPixmap pixmap;
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ObjectPainter::drawButton(imgText, styleSheet, pixmap);
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/* add the image to the resource cache of the text document */
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textDocument->addResource(QTextDocument::ImageResource, QUrl(resourceName), QVariant(pixmap));
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}
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element.removeChild(childNode);
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/* replace text of the anchor with <img> */
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QDomElement img = doc.createElement("img");
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img.setAttribute("src", resourceName);
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element.appendChild(img);
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}
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/**
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* Parses a DOM tree and replaces text by HTML tags.
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* The tree is traversed depth-first, but only through children of Element type
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* nodes. Any other kind of node is terminal.
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*
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* If the node is of type Text, its data is checked against the user-provided
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* regular expression. If there is a match, the text is cut in three parts: the
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* preceding part that will be inserted before, the part to be replaced, and the
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* following part which will be itself checked against the regular expression.
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*
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* The part to be replaced is sent to a user-provided functor that will create
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* the necessary embedding and return a new Element node to be inserted.
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*
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* @param[in] doc The whole DOM tree, necessary to create new nodes
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* @param[in,out] currentElement The current node (which is of type Element)
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* @param[in] embedInfos The regular expression and the type of embedding to use
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*/
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void RsHtml::embedHtml(QTextDocument *textDocument, QDomDocument& doc, QDomElement& currentElement, EmbedInHtml& embedInfos, ulong flag)
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{
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if(embedInfos.myRE.pattern().length() == 0) // we'll get stuck with an empty regexp
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return;
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QDomNodeList children = currentElement.childNodes();
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for(uint index = 0; index < children.length(); index++) {
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QDomNode node = children.item(index);
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if(node.isElement()) {
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// child is an element, we skip it if it's an <a> tag
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QDomElement element = node.toElement();
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if(element.tagName().toLower() == "head") {
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// skip it
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} else if (element.tagName().toLower() == "a") {
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// skip it
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if (embedInfos.myType == Ahref) {
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// but add title if not available
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if (element.attribute("title").isEmpty()) {
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RetroShareLink link(element.attribute("href"));
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if (link.valid()) {
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QString title = link.title();
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if (!title.isEmpty()) {
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element.setAttribute("title", title);
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}
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if (textDocument && (flag & RSHTML_FORMATTEXT_REPLACE_LINKS)) {
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replaceAnchorWithImg(doc, element, textDocument, link);
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}
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}
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} else {
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if (textDocument && (flag & RSHTML_FORMATTEXT_REPLACE_LINKS)) {
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RetroShareLink link(element.attribute("href"));
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if (link.valid()) {
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replaceAnchorWithImg(doc, element, textDocument, link);
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}
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}
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}
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}
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} else {
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embedHtml(textDocument, doc, element, embedInfos, flag);
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}
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}
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else if(node.isText()) {
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// child is a text, we parse it
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QString tempText = node.toText().data();
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if(embedInfos.myRE.indexIn(tempText) == -1)
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continue;
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// there is at least one link inside, we start replacing
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int currentPos = 0;
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int nextPos = 0;
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while((nextPos = embedInfos.myRE.indexIn(tempText, currentPos)) != -1) {
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// if nextPos == 0 it means the text begins by a link
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if(nextPos > 0) {
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QDomText textPart = doc.createTextNode(tempText.mid(currentPos, nextPos - currentPos));
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currentElement.insertBefore(textPart, node);
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index++;
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}
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// inserted tag
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QDomElement insertedTag;
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switch(embedInfos.myType) {
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case Ahref:
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{
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insertedTag = doc.createElement("a");
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insertedTag.setAttribute("href", embedInfos.myRE.cap(0));
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insertedTag.appendChild(doc.createTextNode(embedInfos.myRE.cap(0)));
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RetroShareLink link(embedInfos.myRE.cap(0));
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if (link.valid()) {
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QString title = link.title();
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if (!title.isEmpty()) {
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insertedTag.setAttribute("title", title);
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}
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if (textDocument && (flag & RSHTML_FORMATTEXT_REPLACE_LINKS)) {
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replaceAnchorWithImg(doc, insertedTag, textDocument, link);
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}
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}
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}
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break;
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case Img:
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{
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insertedTag = doc.createElement("img");
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const EmbedInHtmlImg& embedImg = static_cast<const EmbedInHtmlImg&>(embedInfos);
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insertedTag.setAttribute("src", embedImg.smileys[embedInfos.myRE.cap(0)]);
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}
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break;
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}
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currentElement.insertBefore(insertedTag, node);
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index++;
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currentPos = nextPos + embedInfos.myRE.matchedLength();
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}
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// text after the last link, only if there's one, don't touch the index
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// otherwise decrement the index because we're going to remove node
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if(currentPos < tempText.length()) {
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QDomText textPart = doc.createTextNode(tempText.mid(currentPos));
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currentElement.insertBefore(textPart, node);
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}
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else
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index--;
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currentElement.removeChild(node);
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}
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}
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}
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QString RsHtml::formatText(QTextDocument *textDocument, const QString &text, ulong flag, const QColor &backgroundColor, qreal desiredContrast)
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{
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if (flag == 0 || text.isEmpty()) {
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// nothing to do
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return text;
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}
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QDomDocument doc;
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if (doc.setContent(text) == false) {
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// convert text with QTextBrowser
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QTextBrowser textBrowser;
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textBrowser.setText(text);
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doc.setContent(textBrowser.toHtml());
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}
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QDomElement body = doc.documentElement();
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if (flag & RSHTML_FORMATTEXT_EMBED_SMILEYS) {
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embedHtml(textDocument, doc, body, defEmbedImg, flag);
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}
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if (flag & RSHTML_FORMATTEXT_EMBED_LINKS) {
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EmbedInHtmlAhref defEmbedAhref;
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embedHtml(textDocument, doc, body, defEmbedAhref, flag);
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}
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QString formattedText = doc.toString(-1); // -1 removes any annoying carriage return misinterpreted by QTextEdit
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if (flag & RSHTML_OPTIMIZEHTML_MASK) {
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optimizeHtml(formattedText, flag & RSHTML_OPTIMIZEHTML_MASK, backgroundColor, desiredContrast);
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}
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return formattedText;
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}
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static void findElements(QDomDocument& doc, QDomElement& currentElement, const QString& nodeName, const QString& nodeAttribute, QStringList &elements)
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{
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if(nodeName.isEmpty()) {
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return;
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}
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QDomNodeList children = currentElement.childNodes();
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for (uint index = 0; index < children.length(); index++) {
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QDomNode node = children.item(index);
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if (node.isElement()) {
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QDomElement element = node.toElement();
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if (QString::compare(element.tagName(), nodeName, Qt::CaseInsensitive) == 0) {
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if (nodeAttribute.isEmpty()) {
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// use text
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elements.append(element.text());
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} else {
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QString attribute = element.attribute(nodeAttribute);
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if (attribute.isEmpty() == false) {
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elements.append(attribute);
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}
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}
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continue;
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}
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findElements(doc, element, nodeName, nodeAttribute, elements);
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}
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}
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}
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bool RsHtml::findAnchors(const QString &text, QStringList& urls)
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{
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QDomDocument doc;
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if (doc.setContent(text) == false) {
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// convert text with QTextBrowser
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QTextBrowser textBrowser;
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textBrowser.setText(text);
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doc.setContent(textBrowser.toHtml());
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}
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QDomElement body = doc.documentElement();
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findElements(doc, body, "a", "href", urls);
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return true;
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}
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static void removeElement(QDomElement& parentElement, QDomElement& element)
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{
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QDomNodeList children = element.childNodes();
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while (children.length() > 0) {
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QDomNode childElement = element.removeChild(children.item(children.length() - 1));
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parentElement.insertAfter(childElement, element);
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}
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parentElement.removeChild(element);
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}
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static qreal linearizeColorComponent(qreal v)
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{
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if (v <= 0.03928) return v/12.92;
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else return pow((v+0.055)/1.055, 2.4);
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}
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static qreal getRelativeLuminance(const QColor &c)
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{
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qreal r = linearizeColorComponent(c.redF()) * 0.2126;
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qreal g = linearizeColorComponent(c.greenF()) * 0.7152;
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qreal b = linearizeColorComponent(c.blueF()) * 0.0722;
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return r+g+b;
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}
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/**
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* @brief Compute the contrast between two relative luminances.
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* See: http://www.w3.org/TR/2012/NOTE-WCAG20-TECHS-20120103/G18
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* @param lum1, lum2 Relative luminances returned by getRelativeLuminance().
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* @return Contrast between 1 and 21.
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*/
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static qreal getContrastRatio(qreal lum1, qreal lum2)
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{
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if (lum2 > lum1) {
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qreal t = lum1;
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lum1 = lum2;
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lum2 = t;
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}
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return (lum1+0.05)/(lum2+0.05);
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}
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/**
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* @brief Find a color with the same hue that provides the desired contrast with bglum.
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* @param[in,out] val Name of the original color. Will be modified.
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* @param bglum Background's relative luminance as returned by getRelativeLuminance().
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*/
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static void findBestColor(QString &val, qreal bglum, qreal desiredContrast)
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{
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#if QT_VERSION < 0x040600
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// missing methods on class QColor
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Q_UNUSED(val);
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Q_UNUSED(bglum);
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Q_UNUSED(desiredContrast);
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#else
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// Change text color to get a good contrast with the background
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QColor c(val);
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qreal lum = ::getRelativeLuminance(c);
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// Keep text color darker/brighter than the bg if possible
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qreal lowContrast = ::getContrastRatio(bglum, 0.0);
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qreal highContrast = ::getContrastRatio(bglum, 1.0);
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bool searchDown = (lum <= bglum && lowContrast >= desiredContrast)
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|| (lum > bglum && highContrast < desiredContrast && lowContrast >= highContrast);
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// There's no such thing as too much contrast on a bright background,
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// but on a dark background it creates haloing which makes text hard to read.
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// So we enforce desired contrast when the bg is dark.
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if (!searchDown || ::getContrastRatio(lum, bglum) < desiredContrast) {
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// Bisection search of the correct "lightness" to get the desired contrast
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qreal minl = searchDown ? 0.0 : bglum;
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qreal maxl = searchDown ? bglum : 1.0;
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do {
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QColor d = c;
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qreal midl = (minl+maxl)/2.0;
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d.setHslF(c.hslHueF(), c.hslSaturationF(), midl);
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qreal lum = ::getRelativeLuminance(d);
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if ((::getContrastRatio(lum, bglum) < desiredContrast) ^ searchDown ) {
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minl = midl;
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}
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else {
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maxl = midl;
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}
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} while (maxl - minl > 0.01);
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c.setHslF(c.hslHueF(), c.hslSaturationF(), minl);
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val = c.name();
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}
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#endif // QT_VERSION < 0x040600
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}
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static void optimizeHtml(QDomDocument& doc, QDomElement& currentElement, unsigned int flag, qreal bglum, qreal desiredContrast)
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{
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if (currentElement.tagName().toLower() == "html") {
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// change <html> to <span>
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currentElement.setTagName("span");
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}
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QDomNode styleNode;
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bool addBR = false;
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QDomNodeList children = currentElement.childNodes();
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for (uint index = 0; index < children.length(); ) {
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QDomNode node = children.item(index);
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// compress style attribute
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styleNode = node.attributes().namedItem("style");
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if (styleNode.isAttr()) {
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QDomAttr styleAttr = styleNode.toAttr();
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QString style = styleAttr.value().simplified();
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style.replace("margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px;", "margin:0px 0px 0px 0px;");
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style.replace("; ", ";");
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if (flag) {
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QStringList styles = style.split(';');
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style.clear();
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foreach (QString pair, styles) {
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if (!pair.trimmed().isEmpty()) {
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QStringList keyvalue = pair.split(':');
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if (keyvalue.length() == 2) {
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QString key = keyvalue.at(0).trimmed();
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QString val = keyvalue.at(1).trimmed();
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if ((flag & RSHTML_FORMATTEXT_REMOVE_FONT_FAMILY && key == "font-family") ||
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(flag & RSHTML_FORMATTEXT_REMOVE_FONT_SIZE && key == "font-size") ||
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(flag & RSHTML_FORMATTEXT_REMOVE_FONT_WEIGHT && key == "font-weight") ||
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(flag & RSHTML_FORMATTEXT_REMOVE_FONT_STYLE && key == "font-style")) {
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continue;
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}
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if (flag & RSHTML_FORMATTEXT_REMOVE_COLOR) {
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if (key == "color") {
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continue;
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}
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}
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else if (flag & RSHTML_FORMATTEXT_FIX_COLORS) {
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if (key == "color") {
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findBestColor(val, bglum, desiredContrast);
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}
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}
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if (flag & (RSHTML_FORMATTEXT_REMOVE_COLOR | RSHTML_FORMATTEXT_FIX_COLORS)) {
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if (key == "background" || key == "background-color") {
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// Remove background color because if we change the text color,
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// it can become unreadable on the original background.
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// Also, FIX_COLORS is intended to display text on the default
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// background color of the operating system.
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continue;
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}
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}
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style += key + ":" + val + ";";
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} else {
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style += pair + ";";
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}
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}
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}
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}
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if (style.isEmpty()) {
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node.attributes().removeNamedItem("style");
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styleNode.clear();
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} else {
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styleAttr.setValue(style);
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}
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}
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if (node.isElement()) {
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QDomElement element = node.toElement();
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// not <p>
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if (addBR && element.tagName().toLower() != "p") {
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// add <br> after a removed <p> but not before a <p>
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QDomElement elementBr = doc.createElement("br");
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currentElement.insertBefore(elementBr, element);
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addBR = false;
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++index;
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}
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// <body>
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if (element.tagName().toLower() == "body") {
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if (element.attributes().length() == 0) {
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// remove <body> without attributes
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removeElement(currentElement, element);
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// no ++index;
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continue;
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}
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// change <body> to <span>
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element.setTagName("span");
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}
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// <head>
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if (element.tagName().toLower() == "head") {
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// remove <head>
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currentElement.removeChild(node);
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// no ++index;
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continue;
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}
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// iterate children
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optimizeHtml(doc, element, flag, bglum, desiredContrast);
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// <p>
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if (element.tagName().toLower() == "p") {
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// <p style="...">
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if (element.attributes().size() == 1 && styleNode.isAttr()) {
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QString style = styleNode.toAttr().value().simplified();
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if (style == "margin:0px 0px 0px 0px;-qt-block-indent:0;text-indent:0px;" ||
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style.startsWith("-qt-paragraph-type:empty;margin:0px 0px 0px 0px;-qt-block-indent:0;text-indent:0px;")) {
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if (addBR) {
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// add <br> after a removed <p> before a removed <p>
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QDomElement elementBr = doc.createElement("br");
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currentElement.insertBefore(elementBr, element);
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++index;
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}
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// remove Qt standard <p> or empty <p>
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index += element.childNodes().length();
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removeElement(currentElement, element);
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addBR = true;
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continue;
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}
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// check for blockquote (not ready)
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// style="margin-top:12px;margin-bottom:12px;margin-left:40px;margin-right:40px;-qt-block-indent:0;text-indent:0px;"
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// int count = 0; // should be 6
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// QStringList styles = style.split(';');
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// foreach (QString pair, styles) {
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// if (!pair.trimmed().isEmpty()) {
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// QStringList keyvalue = pair.split(':');
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// if (keyvalue.length() == 2) {
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// QString key = keyvalue.at(0).trimmed();
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// QString value = keyvalue.at(1).trimmed();
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// if ((key == "margin-top" || key == "margin-bottom") && value == "12px") {
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// ++count;
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// continue;
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// }
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// if (key == "margin-left" || key == "margin-right") {
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// ++count;
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// continue;
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// }
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// if (key == "-qt-block-indent" && value == "0") {
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// ++count;
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// continue;
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// }
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// if (key == "text-indent" && value == "0px") {
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// ++count;
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// continue;
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// }
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// count = 0;
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// break;
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// } else {
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// count = 0;
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// break;
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// }
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// }
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// }
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// if (count == 6) {
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// // change to "blockquote"
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// element.setTagName("blockquote");
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// element.attributes().removeNamedItem("style");
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// element.setAttribute("type", "cite");
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// }
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}
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addBR = false;
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}
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}
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++index;
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}
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}
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void RsHtml::optimizeHtml(QTextEdit *textEdit, QString &text, unsigned int flag)
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{
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if (textEdit->toHtml() == QTextDocument(textEdit->toPlainText()).toHtml()) {
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text = textEdit->toPlainText();
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// std::cerr << "Optimized text to " << text.length() << " bytes , instead of " << textEdit->toHtml().length() << std::endl;
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return;
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}
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text = textEdit->toHtml();
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optimizeHtml(text, flag);
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}
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/**
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* @brief Make an HTML document smaller by removing useless stuff.
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* Can also change the text color to make it more readable.
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* @param[in,out] text HTML document.
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* @param flag Bitfield of RSHTML_FORMATTEXT_* constants (they must be part of
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* RSHTML_OPTIMIZEHTML_MASK).
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* @param backgroundColor Background color of the widget where the text will be
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* displayed. Needed only if RSHTML_FORMATTEXT_FIX_COLORS
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* is passed inside flag.
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* @param desiredContrast Minimum contrast between text and background color,
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* between 1 and 21.
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*/
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void RsHtml::optimizeHtml(QString &text, unsigned int flag, const QColor &backgroundColor, qreal desiredContrast)
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{
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// int originalLength = text.length();
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// remove doctype
|
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text.remove(QRegExp("<!DOCTYPE[^>]*>"));
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QDomDocument doc;
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if (doc.setContent(text) == false) {
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return;
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}
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QDomElement body = doc.documentElement();
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::optimizeHtml(doc, body, flag, ::getRelativeLuminance(backgroundColor), desiredContrast);
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text = doc.toString(-1);
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// std::cerr << "Optimized text to " << text.length() << " bytes , instead of " << originalLength << std::endl;
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}
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QString RsHtml::toHtml(QString text, bool realHtml)
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{
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// replace "\n" from the optimized html with "<br>"
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text.replace("\n", "<br>");
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if (!realHtml) {
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return text;
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}
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QTextDocument doc;
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doc.setHtml(text);
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return doc.toHtml();
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}
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/** Loads image and converts image to embedded image HTML fragment **/
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bool RsHtml::makeEmbeddedImage(const QString &fileName, QString &embeddedImage, const int maxPixels)
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{
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QImage image;
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if (image.load (fileName) == false) {
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fprintf (stderr, "RsHtml::makeEmbeddedImage() - image \"%s\" can't be load", fileName.toAscii().constData());
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return false;
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}
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return RsHtml::makeEmbeddedImage(image, embeddedImage, maxPixels);
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}
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|
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/** Converts image to embedded image HTML fragment **/
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bool RsHtml::makeEmbeddedImage(const QImage &originalImage, QString &embeddedImage, const int maxPixels)
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{
|
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QByteArray bytearray;
|
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QBuffer buffer(&bytearray);
|
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QImage resizedImage;
|
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const QImage *image = &originalImage;
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|
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if (maxPixels > 0) {
|
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QSize imgSize = originalImage.size();
|
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if ((imgSize.height() * imgSize.width()) > maxPixels) {
|
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// image is too large - resize keeping aspect ratio
|
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QSize newSize;
|
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newSize.setWidth(int(qSqrt((maxPixels * imgSize.width()) / imgSize.height())));
|
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newSize.setHeight(int((imgSize.height() * newSize.width()) / imgSize.width()));
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|
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// ask user
|
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QMessageBox msgBox;
|
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msgBox.setText(QString(QApplication::translate("RsHtml", "Image is oversized for transmission.\nReducing image to %1x%2 pixels?", 0, QApplication::UnicodeUTF8)).arg(newSize.width()).arg(newSize.height()));
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msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
|
|
msgBox.setDefaultButton(QMessageBox::Ok);
|
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if (msgBox.exec() != QMessageBox::Ok) {
|
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return false;
|
|
}
|
|
resizedImage = originalImage.scaled(newSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
|
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image = &resizedImage;
|
|
}
|
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}
|
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|
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if (buffer.open(QIODevice::WriteOnly)) {
|
|
if (image->save(&buffer, "PNG")) {
|
|
QByteArray encodedByteArray = bytearray.toBase64();
|
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|
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embeddedImage = "<img src=\"data:image/png;base64,";
|
|
embeddedImage.append(encodedByteArray);
|
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embeddedImage.append("\">");
|
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} else {
|
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fprintf (stderr, "RsHtml::makeEmbeddedImage() - image can't be saved to buffer");
|
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return false;
|
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}
|
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} else {
|
|
fprintf (stderr, "RsHtml::makeEmbeddedImage() - buffer can't be opened");
|
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return false;
|
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}
|
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return true;
|
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}
|
|
|
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QString RsHtml::plainText(const QString &text)
|
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{
|
|
return Qt::escape(text);
|
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}
|
|
|
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QString RsHtml::plainText(const std::string &text)
|
|
{
|
|
return Qt::escape(QString::fromUtf8(text.c_str()));
|
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}
|