Add minimum font size in chat.

retroshare-gui/src/gui/chat/ChatWidget.cpp

@@ -870,6 +870,7 @@ void ChatWidget::addChatMsg(bool incoming, const QString &name, const QDateTime
 	if (!Settings->valueFromGroup("Chat", "EnableCustomFontSize", true).toBool()) {
 		formatTextFlag |= RSHTML_FORMATTEXT_REMOVE_FONT_SIZE;
 	}
+	int desiredMinimumFontSize = Settings->valueFromGroup("Chat", "MinimumFontSize", 10).toInt();
 	if (!Settings->valueFromGroup("Chat", "EnableBold", true).toBool()) {
 		formatTextFlag |= RSHTML_FORMATTEXT_REMOVE_FONT_WEIGHT;
 	}
@@ -893,7 +894,7 @@ void ChatWidget::addChatMsg(bool incoming, const QString &name, const QDateTime
 		formatFlag |= CHAT_FORMATMSG_SYSTEM;
 	}
 
-	QString formattedMessage = RsHtml().formatText(ui->textBrowser->document(), message, formatTextFlag, backgroundColor, desiredContrast);
+	QString formattedMessage = RsHtml().formatText(ui->textBrowser->document(), message, formatTextFlag, backgroundColor, desiredContrast, desiredMinimumFontSize);
 	QDateTime dtTimestamp=incoming ? sendTime : recvTime;
 	QString formatMsg = chatStyle.formatMessage(type, name, dtTimestamp, formattedMessage, formatFlag);
 	QString timeStamp = dtTimestamp.toString(Qt::ISODate);

retroshare-gui/src/gui/settings/ChatPage.cpp

@@ -115,6 +115,7 @@ ChatPage::save(QString &/*errmsg*/)
     Settings->setValue("Emoteicons_GroupChat", ui.checkBox_emotegroupchat->isChecked());
     Settings->setValue("EnableCustomFonts", ui.checkBox_enableCustomFonts->isChecked());
     Settings->setValue("EnableCustomFontSize", ui.checkBox_enableCustomFontSize->isChecked());
+		Settings->setValue("MinimumFontSize", ui.minimumFontSize->value());
     Settings->setValue("EnableBold", ui.checkBox_enableBold->isChecked());
     Settings->setValue("EnableItalics", ui.checkBox_enableItalics->isChecked());
     Settings->setValue("MinimumContrast", ui.minimumContrast->value());
@@ -219,6 +220,7 @@ ChatPage::load()
     ui.checkBox_emotegroupchat->setChecked(Settings->value("Emoteicons_GroupChat", true).toBool());
     ui.checkBox_enableCustomFonts->setChecked(Settings->value("EnableCustomFonts", true).toBool());
     ui.checkBox_enableCustomFontSize->setChecked(Settings->value("EnableCustomFontSize", true).toBool());
+		ui.minimumFontSize->setValue(Settings->value("MinimumFontSize", 10).toInt());
     ui.checkBox_enableBold->setChecked(Settings->value("EnableBold", true).toBool());
     ui.checkBox_enableItalics->setChecked(Settings->value("EnableItalics", true).toBool());
     ui.minimumContrast->setValue(Settings->value("MinimumContrast", 4.5).toDouble());

retroshare-gui/src/gui/settings/ChatPage.ui

@@ -75,6 +75,43 @@
               </property>
              </widget>
             </item>
+            <item>
+             <layout class="QHBoxLayout" name="hl_minimumFontSize">
+              <property name="topMargin">
+               <number>0</number>
+              </property>
+              <item>
+               <widget class="QLabel" name="minimumFontSizeLabel">
+                <property name="text">
+                 <string>Minimum font size</string>
+                </property>
+               </widget>
+              </item>
+              <item>
+               <spacer name="hs_minimumFontSize">
+                <property name="orientation">
+                 <enum>Qt::Horizontal</enum>
+                </property>
+                <property name="sizeHint" stdset="0">
+                 <size>
+                  <width>40</width>
+                  <height>20</height>
+                 </size>
+                </property>
+               </spacer>
+              </item>
+              <item>
+               <widget class="QSpinBox" name="minimumFontSize">
+                <property name="minimum">
+                 <number>1</number>
+                </property>
+                <property name="maximum">
+                 <number>64</number>
+                </property>
+               </widget>
+              </item>
+             </layout>
+            </item>
             <item>
              <widget class="QCheckBox" name="checkBox_enableBold">
               <property name="text">

retroshare-gui/src/util/HandleRichText.cpp

@@ -376,7 +376,7 @@ static QString saveSpace(const QString text)
 	return savedSpaceText;
 }
 
-QString RsHtml::formatText(QTextDocument *textDocument, const QString &text, ulong flag, const QColor &backgroundColor, qreal desiredContrast)
+QString RsHtml::formatText(QTextDocument *textDocument, const QString &text, ulong flag, const QColor &backgroundColor, qreal desiredContrast, int desiredMinimumFontSize)
 {
 	if (flag == 0 || text.isEmpty()) {
 		// nothing to do
@@ -416,7 +416,7 @@ QString RsHtml::formatText(QTextDocument *textDocument, const QString &text, ulo
 	formattedText = doc.toString(-1);  // -1 removes any annoying carriage return misinterpreted by QTextEdit
 
 	if (flag & RSHTML_OPTIMIZEHTML_MASK) {
-		optimizeHtml(formattedText, flag, backgroundColor, desiredContrast);
+		optimizeHtml(formattedText, flag, backgroundColor, desiredContrast, desiredMinimumFontSize);
 	}
 
 	return formattedText;
@@ -734,12 +734,14 @@ static void optimizeHtml(QDomDocument& doc
  *                        is passed inside flag.
  * @param desiredContrast: Minimum contrast between text and background color,
  *                        between 1 and 21.
+ * @param desiredMinimumFontSize: Minimum font size.
  */
 static void styleCreate(QDomDocument& doc
                         , QHash<QString, QStringList*> stylesList
                         , unsigned int flag
                         , qreal bglum
-                        , qreal desiredContrast)
+                        , qreal desiredContrast
+                        , int desiredMinimumFontSize)
 {
 	QDomElement styleElem;
 	do{
@@ -792,6 +794,15 @@ static void styleCreate(QDomDocument& doc
 			QString key = keyvalue.at(0).trimmed();
 			QString val = keyvalue.at(1).trimmed();
 
+			if (key == "font-size") {
+				QRegExp re("(\\d+)(\\D*)");
+				if (re.indexIn(val) != -1) {
+					bool ok; int iVal = re.cap(1).toInt(&ok);
+					if (ok && (iVal < desiredMinimumFontSize)) {
+						val = QString::number(desiredMinimumFontSize) + re.cap(2);
+					}
+				}
+			}
 			if ((flag & RSHTML_FORMATTEXT_REMOVE_FONT_FAMILY && key == "font-family") ||
 				(flag & RSHTML_FORMATTEXT_REMOVE_FONT_SIZE && key == "font-size") ||
 				(flag & RSHTML_FORMATTEXT_REMOVE_FONT_WEIGHT && key == "font-weight") ||
@@ -864,9 +875,12 @@ void RsHtml::optimizeHtml(QTextEdit *textEdit, QString &text, unsigned int flag
  *                        is passed inside flag.
  * @param desiredContrast Minimum contrast between text and background color,
  *                        between 1 and 21.
+ * @param desiredMinimumFontSize Minimum font size.
  */
 void RsHtml::optimizeHtml(QString &text, unsigned int flag /*= 0*/
-                          , const QColor &backgroundColor /*= Qt::white*/, qreal desiredContrast /*= 1.0*/
+                          , const QColor &backgroundColor /*= Qt::white*/
+                          , qreal desiredContrast /*= 1.0*/
+                          , int desiredMinimumFontSize /*=10*/
                           )
 {
 
@@ -888,7 +902,7 @@ void RsHtml::optimizeHtml(QString &text, unsigned int flag /*= 0*/
 	QHash<QString, QString> knownStyle;
 
 	::optimizeHtml(doc, body, stylesList, knownStyle);
-	::styleCreate(doc, stylesList, flag, ::getRelativeLuminance(backgroundColor), desiredContrast);
+	::styleCreate(doc, stylesList, flag, ::getRelativeLuminance(backgroundColor), desiredContrast, desiredMinimumFontSize);
 	text = doc.toString(-1);
 
 //	std::cerr << "Optimized text to " << text.length() << " bytes , instead of " << originalLength << std::endl;

retroshare-gui/src/util/HandleRichText.h

@@ -59,11 +59,11 @@ public:
 
 	static void    initEmoticons(const QHash< QString, QString >& hash);
 
-	QString formatText(QTextDocument *textDocument, const QString &text, ulong flag, const QColor &backgroundColor = Qt::white, qreal desiredContrast = 1.0);
+	QString formatText(QTextDocument *textDocument, const QString &text, ulong flag, const QColor &backgroundColor = Qt::white, qreal desiredContrast = 1.0, int desiredMinimumFontSize = 10);
 	static bool    findAnchors(const QString &text, QStringList& urls);
 
 	static void    optimizeHtml(QTextEdit *textEdit, QString &text, unsigned int flag = 0);
-	static void    optimizeHtml(QString &text, unsigned int flag = 0, const QColor &backgroundColor = Qt::white, qreal desiredContrast = 1.0);
+	static void    optimizeHtml(QString &text, unsigned int flag = 0, const QColor &backgroundColor = Qt::white, qreal desiredContrast = 1.0, int desiredMinimumFontSize = 10);
 	static QString toHtml(QString text, bool realHtml = true);
 
 	static bool    makeEmbeddedImage(const QString &fileName, QString &embeddedImage, const int maxPixels);