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tdepim/libkdepim/linklocator.cpp

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/**
* linklocator.cpp
*
* Copyright (c) 2002 Dave Corrie <kde@davecorrie.com>
*
* This file is part of KMail.
*
* KMail is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "linklocator.h"
#include "pimemoticons.h"
#include <kglobal.h>
#include <kstandarddirs.h>
#include <kstaticdeleter.h>
#include <kmdcodec.h>
#include <kdebug.h>
#include <qstylesheet.h>
#include <qfile.h>
#include <qregexp.h>
#include <limits.h>
QMap<QString, QString> *LinkLocator::s_smileyEmoticonNameMap = 0;
QMap<QString, QString> *LinkLocator::s_smileyEmoticonHTMLCache = 0;
static KStaticDeleter< QMap<QString, QString> > smileyMapDeleter;
static KStaticDeleter< QMap<QString, QString> > smileyCacheDeleter;
LinkLocator::LinkLocator(const QString& text, int pos)
: mText(text), mPos(pos), mMaxUrlLen(4096), mMaxAddressLen(255)
{
// If you change either of the above values for maxUrlLen or
// maxAddressLen, then please also update the documentation for
// setMaxUrlLen()/setMaxAddressLen() in the header file AND the
// default values used for the maxUrlLen/maxAddressLen parameters
// of convertToHtml().
if ( !s_smileyEmoticonNameMap ) {
smileyMapDeleter.setObject( s_smileyEmoticonNameMap,
new QMap<QString, QString>() );
for ( int i = 0; i < EmotIcons::EnumSindex::COUNT; ++i ) {
QString imageName( EmotIcons::EnumSindex::enumToString[i] );
imageName.truncate( imageName.length() - 2 ); //remove the _0 bit
s_smileyEmoticonNameMap->insert( EmotIcons::smiley(i), imageName );
}
}
if ( !s_smileyEmoticonHTMLCache )
smileyCacheDeleter.setObject( s_smileyEmoticonHTMLCache,
new QMap<QString, QString>() );
}
void LinkLocator::setMaxUrlLen(int length)
{
mMaxUrlLen = length;
}
int LinkLocator::maxUrlLen() const
{
return mMaxUrlLen;
}
void LinkLocator::setMaxAddressLen(int length)
{
mMaxAddressLen = length;
}
int LinkLocator::maxAddressLen() const
{
return mMaxAddressLen;
}
QString LinkLocator::getUrl()
{
QString url;
if(atUrl())
{
// handle cases like this: <link>http://foobar.org/</link>
int start = mPos;
while(mPos < (int)mText.length() && mText[mPos] > ' ' && mText[mPos] != '"' &&
QString("<>()[]").find(mText[mPos]) == -1)
{
++mPos;
}
/* some URLs really end with: # / & - _ */
const QString allowedSpecialChars = QString("#/&-_");
while(mPos > start && mText[mPos-1].isPunct() &&
allowedSpecialChars.find(mText[mPos-1]) == -1 )
{
--mPos;
}
url = mText.mid(start, mPos - start);
if(isEmptyUrl(url) || mPos - start > maxUrlLen())
{
mPos = start;
url = "";
}
else
{
--mPos;
}
}
return url;
}
// keep this in sync with KMMainWin::slotUrlClicked()
bool LinkLocator::atUrl() const
{
// the following characters are allowed in a dot-atom (RFC 2822):
// a-z A-Z 0-9 . ! # $ % & ' * + - / = ? ^ _ ` { | } ~
const QString allowedSpecialChars = QString(".!#$%&'*+-/=?^_`{|}~");
// the character directly before the URL must not be a letter, a number or
// any other character allowed in a dot-atom (RFC 2822).
if( ( mPos > 0 ) && ( mText[mPos-1].isLetterOrNumber() ||
( allowedSpecialChars.find( mText[mPos-1] ) != -1 ) ) )
return false;
QChar ch = mText[mPos];
return (ch=='h' && ( mText.mid(mPos, 7) == "http://" ||
mText.mid(mPos, 8) == "https://") ) ||
(ch=='v' && mText.mid(mPos, 6) == "vnc://") ||
(ch=='f' && ( mText.mid(mPos, 7) == "fish://" ||
mText.mid(mPos, 6) == "ftp://" ||
mText.mid(mPos, 7) == "ftps://") ) ||
(ch=='s' && ( mText.mid(mPos, 7) == "sftp://" ||
mText.mid(mPos, 6) == "smb://") ) ||
(ch=='m' && mText.mid(mPos, 7) == "mailto:") ||
(ch=='w' && mText.mid(mPos, 4) == "www.") ||
(ch=='f' && mText.mid(mPos, 4) == "ftp.") ||
(ch=='n' && mText.mid(mPos, 5) == "news:");
// note: no "file:" for security reasons
}
bool LinkLocator::isEmptyUrl(const QString& url)
{
return url.isEmpty() ||
url == "http://" ||
url == "https://" ||
url == "fish://" ||
url == "ftp://" ||
url == "ftps://" ||
url == "sftp://" ||
url == "smb://" ||
url == "vnc://" ||
url == "mailto" ||
url == "www" ||
url == "ftp" ||
url == "news" ||
url == "news://";
}
QString LinkLocator::getEmailAddress()
{
QString address;
if ( mText[mPos] == '@' ) {
// the following characters are allowed in a dot-atom (RFC 2822):
// a-z A-Z 0-9 . ! # $ % & ' * + - / = ? ^ _ ` { | } ~
const QString allowedSpecialChars = QString(".!#$%&'*+-/=?^_`{|}~");
// determine the local part of the email address
int start = mPos - 1;
while ( start >= 0 && mText[start].unicode() < 128 &&
( mText[start].isLetterOrNumber() ||
mText[start] == '@' || // allow @ to find invalid email addresses
allowedSpecialChars.find( mText[start] ) != -1 ) ) {
if ( mText[start] == '@' )
return QString(); // local part contains '@' -> no email address
--start;
}
++start;
// we assume that an email address starts with a letter or a digit
while ( ( start < mPos ) && !mText[start].isLetterOrNumber() )
++start;
if ( start == mPos )
return QString(); // local part is empty -> no email address
// determine the domain part of the email address
int dotPos = INT_MAX;
int end = mPos + 1;
while ( end < (int)mText.length() &&
( mText[end].isLetterOrNumber() ||
mText[end] == '@' || // allow @ to find invalid email addresses
mText[end] == '.' ||
mText[end] == '-' ) ) {
if ( mText[end] == '@' )
return QString(); // domain part contains '@' -> no email address
if ( mText[end] == '.' )
dotPos = QMIN( dotPos, end ); // remember index of first dot in domain
++end;
}
// we assume that an email address ends with a letter or a digit
while ( ( end > mPos ) && !mText[end - 1].isLetterOrNumber() )
--end;
if ( end == mPos )
return QString(); // domain part is empty -> no email address
if ( dotPos >= end )
return QString(); // domain part doesn't contain a dot
if ( end - start > maxAddressLen() )
return QString(); // too long -> most likely no email address
address = mText.mid( start, end - start );
mPos = end - 1;
}
return address;
}
QString LinkLocator::convertToHtml(const QString& plainText, int flags,
int maxUrlLen, int maxAddressLen)
{
LinkLocator locator(plainText);
locator.setMaxUrlLen(maxUrlLen);
locator.setMaxAddressLen(maxAddressLen);
QString str;
QString result((QChar*)0, (int)locator.mText.length() * 2);
QChar ch;
int x;
bool startOfLine = true;
QString emoticon;
for (locator.mPos = 0, x = 0; locator.mPos < (int)locator.mText.length(); locator.mPos++, x++)
{
ch = locator.mText[locator.mPos];
if ( flags & PreserveSpaces )
{
if (ch==' ')
{
if (startOfLine) {
result += "&nbsp;";
locator.mPos++, x++;
startOfLine = false;
}
while (locator.mText[locator.mPos] == ' ')
{
result += " ";
locator.mPos++, x++;
if (locator.mText[locator.mPos] == ' ') {
result += "&nbsp;";
locator.mPos++, x++;
}
}
locator.mPos--, x--;
continue;
}
else if (ch=='\t')
{
do
{
result += "&nbsp;";
x++;
}
while((x&7) != 0);
x--;
startOfLine = false;
continue;
}
}
if (ch=='\n')
{
result += "<br />";
startOfLine = true;
x = -1;
continue;
}
startOfLine = false;
if (ch=='&')
result += "&amp;";
else if (ch=='"')
result += "&quot;";
else if (ch=='<')
result += "&lt;";
else if (ch=='>')
result += "&gt;";
else
{
const int start = locator.mPos;
if ( !(flags & IgnoreUrls) ) {
str = locator.getUrl();
if (!str.isEmpty())
{
QString hyperlink;
if(str.left(4) == "www.")
hyperlink = "http://" + str;
else if(str.left(4) == "ftp.")
hyperlink = "ftp://" + str;
else
hyperlink = str;
str = str.replace('&', "&amp;");
result += "<a href=\"" + hyperlink + "\">" + str + "</a>";
x += locator.mPos - start;
continue;
}
str = locator.getEmailAddress();
if(!str.isEmpty())
{
// len is the length of the local part
int len = str.find('@');
QString localPart = str.left(len);
// remove the local part from the result (as '&'s have been expanded to
// &amp; we have to take care of the 4 additional characters per '&')
result.truncate(result.length() - len - (localPart.contains('&')*4));
x -= len;
result += "<a href=\"mailto:" + str + "\">" + str + "</a>";
x += str.length() - 1;
continue;
}
}
if ( flags & ReplaceSmileys ) {
str = locator.getEmoticon();
if ( ! str.isEmpty() ) {
result += str;
x += locator.mPos - start;
continue;
}
}
if ( flags & HighlightText ) {
str = locator.highlightedText();
if ( !str.isEmpty() ) {
result += str;
x += locator.mPos - start;
continue;
}
}
result += ch;
}
}
return result;
}
QString LinkLocator::pngToDataUrl( const QString & iconPath )
{
if ( iconPath.isEmpty() )
return QString::null;
QFile pngFile( iconPath );
if ( !pngFile.open( IO_ReadOnly | IO_Raw ) )
return QString::null;
QByteArray ba = pngFile.readAll();
pngFile.close();
return QString::fromLatin1("data:image/png;base64,%1")
.arg( KCodecs::base64Encode( ba ) );
}
QString LinkLocator::getEmoticon()
{
// smileys have to be prepended by whitespace
if ( ( mPos > 0 ) && !mText[mPos-1].isSpace() )
return QString::null;
// since smileys start with ':', ';', '(' or '8' short circuit method
const QChar ch = mText[mPos];
if ( ch !=':' && ch != ';' && ch != '(' && ch != '8' )
return QString::null;
// find the end of the smiley (a smiley is at most 4 chars long and ends at
// lineend or whitespace)
const int MinSmileyLen = 2;
const int MaxSmileyLen = 4;
int smileyLen = 1;
while ( ( smileyLen <= MaxSmileyLen ) &&
( mPos+smileyLen < (int)mText.length() ) &&
!mText[mPos+smileyLen].isSpace() )
smileyLen++;
if ( smileyLen < MinSmileyLen || smileyLen > MaxSmileyLen )
return QString::null;
const QString smiley = mText.mid( mPos, smileyLen );
if ( !s_smileyEmoticonNameMap->contains( smiley ) )
return QString::null; // that's not a (known) smiley
QString htmlRep;
if ( s_smileyEmoticonHTMLCache->contains( smiley ) ) {
htmlRep = (*s_smileyEmoticonHTMLCache)[smiley];
}
else {
const QString imageName = (*s_smileyEmoticonNameMap)[smiley];
#if KDE_IS_VERSION( 3, 3, 91 )
const QString iconPath = locate( "emoticons",
EmotIcons::theme() +
QString::fromLatin1( "/" ) +
imageName + QString::fromLatin1(".png") );
#else
const QString iconPath = locate( "data",
QString::fromLatin1( "kopete/pics/emoticons/" )+
EmotIcons::theme() +
QString::fromLatin1( "/" ) +
imageName + QString::fromLatin1(".png") );
#endif
const QString dataUrl = pngToDataUrl( iconPath );
if ( dataUrl.isEmpty() ) {
htmlRep = QString::null;
}
else {
// create an image tag (the text in attribute alt is used
// for copy & paste) representing the smiley
htmlRep = QString("<img class=\"pimsmileyimg\" src=\"%1\" "
"alt=\"%2\" title=\"%3\" width=\"16\" height=\"16\"/>")
.arg( dataUrl,
QStyleSheet::escape( smiley ),
QStyleSheet::escape( smiley ) );
}
s_smileyEmoticonHTMLCache->insert( smiley, htmlRep );
}
if ( !htmlRep.isEmpty() )
mPos += smileyLen - 1;
return htmlRep;
}
QString LinkLocator::highlightedText()
{
// formating symbols must be prepended with a whitespace
if ( ( mPos > 0 ) && !mText[mPos-1].isSpace() )
return QString::null;
const QChar ch = mText[mPos];
if ( ch != '/' && ch != '*' && ch != '_' )
return QString::null;
QRegExp re = QRegExp( QString("\\%1([0-9A-Za-z]+)\\%2").arg( ch ).arg( ch ) );
if ( re.search( mText, mPos ) == mPos ) {
uint length = re.matchedLength();
// there must be a whitespace after the closing formating symbol
if ( mPos + length < mText.length() && !mText[mPos + length].isSpace() )
return QString::null;
mPos += length - 1;
switch ( ch.latin1() ) {
case '*':
return "<b>" + re.cap( 1 ) + "</b>";
case '_':
return "<u>" + re.cap( 1 ) + "</u>";
case '/':
return "<i>" + re.cap( 1 ) + "</i>";
}
}
return QString::null;
}