You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
381 lines
14 KiB
381 lines
14 KiB
/*
|
|
This file is part of the KDE libraries
|
|
|
|
Copyright (c) 2002-2003 Oswald Buddenhagen <ossi@kde.org>
|
|
Copyright (c) 2003 Waldo Bastian <bastian@kde.org>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
This library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA.
|
|
*/
|
|
#ifndef _KMACROEXPANDER_H
|
|
#define _KMACROEXPANDER_H
|
|
|
|
#include <qstringlist.h>
|
|
#include <qstring.h>
|
|
#include <qmap.h>
|
|
#include "kdelibs_export.h"
|
|
|
|
/**
|
|
* Abstract base class for the worker classes behind the KMacroExpander namespace
|
|
* and the KCharMacroExpander and KWordMacroExpander classes.
|
|
*
|
|
* @since 3.1.3
|
|
* @author Oswald Buddenhagen <ossi@kde.org>
|
|
*/
|
|
class KDECORE_EXPORT KMacroExpanderBase {
|
|
|
|
public:
|
|
/**
|
|
* Constructor.
|
|
* @param c escape char indicating start of macros, or QChar::null for none
|
|
*/
|
|
KMacroExpanderBase( QChar c = '%' );
|
|
|
|
/**
|
|
* Destructor.
|
|
*/
|
|
virtual ~KMacroExpanderBase();
|
|
|
|
/**
|
|
* Perform safe macro expansion (substitution) on a string.
|
|
*
|
|
* @param str the string in which macros are expanded in-place
|
|
*/
|
|
void expandMacros( QString &str );
|
|
|
|
/*
|
|
* Perform safe macro expansion (substitution) on a string for use
|
|
* in shell commands.
|
|
*
|
|
* Explicitly supported shell constructs:
|
|
* \ '' "" $'' $"" {} () $(()) ${} $() ``
|
|
*
|
|
* Implicitly supported shell constructs:
|
|
* (())
|
|
*
|
|
* Unsupported shell constructs that will cause problems:
|
|
* @li Shortened "case $v in pat)" syntax. Use "case $v in (pat)" instead.
|
|
*
|
|
* The rest of the shell (incl. bash) syntax is simply ignored,
|
|
* as it is not expected to cause problems.
|
|
*
|
|
* Note that bash contains a bug which makes macro expansion within
|
|
* double quoted substitutions ("${VAR:-%macro}") inherently insecure.
|
|
*
|
|
* @param str the string in which macros are expanded in-place
|
|
* @param pos the position inside the string at which parsing/substitution
|
|
* should start, and upon exit where processing stopped
|
|
* @return false if the string could not be parsed and therefore no safe
|
|
* substitution was possible. Note that macros will have been processed
|
|
* up to the point where the error occurred. An unmatched closing paren
|
|
* or brace outside any shell construct is @em not an error (unlike in
|
|
* the function below), but still prematurely terminates processing.
|
|
*/
|
|
bool expandMacrosShellQuote( QString &str, uint &pos );
|
|
|
|
/**
|
|
* Same as above, but always starts at position 0, and unmatched closing
|
|
* parens and braces are treated as errors.
|
|
*/
|
|
bool expandMacrosShellQuote( QString &str );
|
|
|
|
/**
|
|
* Set the macro escape character.
|
|
* @param c escape char indicating start of macros, or QChar::null if none
|
|
*/
|
|
void setEscapeChar( QChar c );
|
|
|
|
/**
|
|
* Obtain the macro escape character.
|
|
* @return escape char indicating start of macros, or QChar::null if none
|
|
*/
|
|
QChar escapeChar() const;
|
|
|
|
protected:
|
|
/**
|
|
* This function is called for every single char within the string if
|
|
* the escape char is QChar::null. It should determine whether the
|
|
* string starting at @p pos within @p str is a valid macro and return
|
|
* the substitution value for it if so.
|
|
* @param str the input string
|
|
* @param pos the offset within @p str
|
|
* @param ret return value: the string to substitute for the macro
|
|
* @return if greater than zero, the number of chars at @p pos in @p str
|
|
* to substitute with @p ret (i.e., a valid macro was found). if less
|
|
* than zero, subtract this value from @p pos (to skip a macro, i.e.,
|
|
* substitute it with itself). zero requests no special action.
|
|
*/
|
|
virtual int expandPlainMacro( const QString &str, uint pos, QStringList &ret );
|
|
|
|
/**
|
|
* This function is called every time the escape char is found if it is
|
|
* not QChar::null. It should determine whether the
|
|
* string starting at @p pos witin @p str is a valid macro and return
|
|
* the substitution value for it if so.
|
|
* @param str the input string
|
|
* @param pos the offset within @p str. Note that this is the position of
|
|
* the occurrence of the escape char
|
|
* @param ret return value: the string to substitute for the macro
|
|
* @return if greater than zero, the number of chars at @p pos in @p str
|
|
* to substitute with @p ret (i.e., a valid macro was found). if less
|
|
* than zero, subtract this value from @p pos (to skip a macro, i.e.,
|
|
* substitute it with itself). zero requests no special action.
|
|
*/
|
|
virtual int expandEscapedMacro( const QString &str, uint pos, QStringList &ret );
|
|
|
|
private:
|
|
QChar escapechar;
|
|
};
|
|
|
|
/**
|
|
* Abstract base class for simple word macro substitutors. Use this instead of
|
|
* the functions in the KMacroExpander namespace if speculatively pre-filling
|
|
* the substitution map would be too expensive.
|
|
*
|
|
* A typical application:
|
|
*
|
|
* \code
|
|
* class MyClass {
|
|
* ...
|
|
* private:
|
|
* QString m_str;
|
|
* ...
|
|
* friend class MyExpander;
|
|
* };
|
|
*
|
|
* class MyExpander : public KWordMacroExpander {
|
|
* public:
|
|
* MyExpander( MyClass *_that ) : KWordMacroExpander(), that( _that ) {}
|
|
* protected:
|
|
* virtual bool expandMacro( const QString &str, QStringList &ret );
|
|
* private:
|
|
* MyClass *that;
|
|
* };
|
|
*
|
|
* bool MyExpander::expandMacro( const QString &str, QStringList &ret )
|
|
* {
|
|
* if (str == "macro") {
|
|
* ret += complexOperation( that->m_str );
|
|
* return true;
|
|
* }
|
|
* return false;
|
|
* }
|
|
*
|
|
* ... MyClass::...(...)
|
|
* {
|
|
* QString str;
|
|
* ...
|
|
* MyExpander mx( this );
|
|
* mx.expandMacrosShellQuote( str );
|
|
* ...
|
|
* }
|
|
* \endcode
|
|
*
|
|
* Alternatively MyClass could inherit from KWordMacroExpander directly.
|
|
*
|
|
* @since 3.3
|
|
* @author Oswald Buddenhagen <ossi@kde.org>
|
|
*/
|
|
class KDECORE_EXPORT KWordMacroExpander : public KMacroExpanderBase {
|
|
|
|
public:
|
|
/**
|
|
* Constructor.
|
|
* @param c escape char indicating start of macros, or QChar::null for none
|
|
*/
|
|
KWordMacroExpander( QChar c = '%' ) : KMacroExpanderBase( c ) {}
|
|
|
|
protected:
|
|
virtual int expandPlainMacro( const QString &str, uint pos, QStringList &ret );
|
|
virtual int expandEscapedMacro( const QString &str, uint pos, QStringList &ret );
|
|
|
|
/**
|
|
* Return substitution list @p ret for string macro @p str.
|
|
* @param str the macro to expand
|
|
* @param ret return variable reference. It is guaranteed to be empty
|
|
* when expandMacro is entered.
|
|
* @return @c true iff @p chr was a recognized macro name
|
|
*/
|
|
virtual bool expandMacro( const QString &str, QStringList &ret ) = 0;
|
|
};
|
|
|
|
/**
|
|
* Abstract base class for single char macro substitutors. Use this instead of
|
|
* the functions in the KMacroExpander namespace if speculatively pre-filling
|
|
* the substitution map would be too expensive.
|
|
*
|
|
* See KWordMacroExpander for a sample application.
|
|
*
|
|
* @since 3.3
|
|
* @author Oswald Buddenhagen <ossi@kde.org>
|
|
*/
|
|
class KDECORE_EXPORT KCharMacroExpander : public KMacroExpanderBase {
|
|
|
|
public:
|
|
/**
|
|
* Constructor.
|
|
* @param c escape char indicating start of macros, or QChar::null for none
|
|
*/
|
|
KCharMacroExpander( QChar c = '%' ) : KMacroExpanderBase( c ) {}
|
|
|
|
protected:
|
|
virtual int expandPlainMacro( const QString &str, uint pos, QStringList &ret );
|
|
virtual int expandEscapedMacro( const QString &str, uint pos, QStringList &ret );
|
|
|
|
/**
|
|
* Return substitution list @p ret for single-character macro @p chr.
|
|
* @param chr the macro to expand
|
|
* @param ret return variable reference. It is guaranteed to be empty
|
|
* when expandMacro is entered.
|
|
* @return @c true iff @p chr was a recognized macro name
|
|
*/
|
|
virtual bool expandMacro( QChar chr, QStringList &ret ) = 0;
|
|
};
|
|
|
|
/**
|
|
* A group of functions providing macro expansion (substitution) in strings,
|
|
* optionally with quoting appropriate for shell execution.
|
|
* @since 3.1.3
|
|
*/
|
|
namespace KMacroExpander {
|
|
/**
|
|
* Perform safe macro expansion (substitution) on a string.
|
|
* The escape char must be quoted with itself to obtain its literal
|
|
* representation in the resulting string.
|
|
*
|
|
* @param str The string to expand
|
|
* @param map map with substitutions
|
|
* @param c escape char indicating start of macro, or QChar::null if none
|
|
* @return the string with all valid macros expanded
|
|
*
|
|
* \code
|
|
* // Code example
|
|
* QMap<QChar,QString> map;
|
|
* map.insert('u', "/tmp/myfile.txt");
|
|
* map.insert('n', "My File");
|
|
* QString s = "%% Title: %u:%n";
|
|
* s = KMacroExpander::expandMacros(s, map);
|
|
* // s is now "% Title: /tmp/myfile.txt:My File";
|
|
* \endcode
|
|
*/
|
|
KDECORE_EXPORT QString expandMacros( const QString &str, const QMap<QChar,QString> &map, QChar c = '%' );
|
|
|
|
/**
|
|
* Perform safe macro expansion (substitution) on a string for use
|
|
* in shell commands.
|
|
* The escape char must be quoted with itself to obtain its literal
|
|
* representation in the resulting string.
|
|
*
|
|
* @param str The string to expand
|
|
* @param map map with substitutions
|
|
* @param c escape char indicating start of macro, or QChar::null if none
|
|
* @return the string with all valid macros expanded, or a null string
|
|
* if a shell syntax error was detected in the command
|
|
*
|
|
* \code
|
|
* // Code example
|
|
* QMap<QChar,QString> map;
|
|
* map.insert('u', "/tmp/myfile.txt");
|
|
* map.insert('n', "My File");
|
|
* QString s = "kedit --caption %n %u";
|
|
* s = KMacroExpander::expandMacrosShellQuote(s, map);
|
|
* // s is now "kedit --caption 'My File' '/tmp/myfile.txt'";
|
|
* system(QFile::encodeName(s));
|
|
* \endcode
|
|
*/
|
|
KDECORE_EXPORT QString expandMacrosShellQuote( const QString &str, const QMap<QChar,QString> &map, QChar c = '%' );
|
|
|
|
/**
|
|
* Perform safe macro expansion (substitution) on a string.
|
|
* The escape char must be quoted with itself to obtain its literal
|
|
* representation in the resulting string.
|
|
* Macro names can consist of chars in the range [A-Za-z0-9_];
|
|
* use braces to delimit macros from following words starting
|
|
* with these chars, or to use other chars for macro names.
|
|
*
|
|
* @param str The string to expand
|
|
* @param map map with substitutions
|
|
* @param c escape char indicating start of macro, or QChar::null if none
|
|
* @return the string with all valid macros expanded
|
|
*
|
|
* \code
|
|
* // Code example
|
|
* QMap<QString,QString> map;
|
|
* map.insert("url", "/tmp/myfile.txt");
|
|
* map.insert("name", "My File");
|
|
* QString s = "Title: %{url}-%name";
|
|
* s = KMacroExpander::expandMacros(s, map);
|
|
* // s is now "Title: /tmp/myfile.txt-My File";
|
|
* \endcode
|
|
*/
|
|
KDECORE_EXPORT QString expandMacros( const QString &str, const QMap<QString,QString> &map, QChar c = '%' );
|
|
|
|
/**
|
|
* Perform safe macro expansion (substitution) on a string for use
|
|
* in shell commands.
|
|
* The escape char must be quoted with itself to obtain its literal
|
|
* representation in the resulting string.
|
|
* Macro names can consist of chars in the range [A-Za-z0-9_];
|
|
* use braces to delimit macros from following words starting
|
|
* with these chars, or to use other chars for macro names.
|
|
*
|
|
* @param str The string to expand
|
|
* @param map map with substitutions
|
|
* @param c escape char indicating start of macro, or QChar::null if none
|
|
* @return the string with all valid macros expanded, or a null string
|
|
* if a shell syntax error was detected in the command
|
|
*
|
|
* \code
|
|
* // Code example
|
|
* QMap<QString,QString> map;
|
|
* map.insert("url", "/tmp/myfile.txt");
|
|
* map.insert("name", "My File");
|
|
* QString s = "kedit --caption %name %{url}";
|
|
* s = KMacroExpander::expandMacrosShellQuote(s, map);
|
|
* // s is now "kedit --caption 'My File' '/tmp/myfile.txt'";
|
|
* system(QFile::encodeName(s));
|
|
* \endcode
|
|
*/
|
|
KDECORE_EXPORT QString expandMacrosShellQuote( const QString &str, const QMap<QString,QString> &map, QChar c = '%' );
|
|
|
|
/**
|
|
* Same as above, except that the macros expand to string lists that
|
|
* are simply join(" ")ed together.
|
|
*/
|
|
KDECORE_EXPORT QString expandMacros( const QString &str, const QMap<QChar,QStringList> &map, QChar c = '%' );
|
|
/**
|
|
* Same as above, except that the macros expand to string lists that
|
|
* are simply join(" ")ed together.
|
|
*/
|
|
KDECORE_EXPORT QString expandMacros( const QString &str, const QMap<QString,QStringList> &map, QChar c = '%' );
|
|
|
|
/**
|
|
* Same as above, except that the macros expand to string lists.
|
|
* If the macro appears inside a quoted string, the list is simply
|
|
* join(" ")ed together; otherwise every element expands to a separate
|
|
* quoted string.
|
|
*/
|
|
KDECORE_EXPORT QString expandMacrosShellQuote( const QString &str, const QMap<QChar,QStringList> &map, QChar c = '%' );
|
|
/**
|
|
* Same as above, except that the macros expand to string lists.
|
|
* If the macro appears inside a quoted string, the list is simply
|
|
* join(" ")ed together; otherwise every element expands to a separate
|
|
* quoted string.
|
|
*/
|
|
KDECORE_EXPORT QString expandMacrosShellQuote( const QString &str, const QMap<QString,QStringList> &map, QChar c = '%' );
|
|
}
|
|
|
|
#endif /* _KMACROEXPANDER_H */
|