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+/* This file is part of the KDE libraries
+   Copyright (C) 2003 Jesse Yurkovich <yurkjes@iit.edu>
+   Copyright (C) 2004 >Anders Lund <anders@alweb.dk> (KateVarIndent class)
+   Copyright (C) 2005 Dominik Haumann <dhdev@gmx.de> (basic support for config page)
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License version 2 as published by the Free Software Foundation.
+
+   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 __KATE_AUTO_INDENT_H__
+#define __KATE_AUTO_INDENT_H__
+
+#include <qobject.h>
+
+#include "katecursor.h"
+#include "kateconfig.h"
+#include "katejscript.h"
+class KateDocument;
+
+/**
+ * This widget will be embedded into a modal dialog when clicking
+ * the "Configure..." button in the indentation config page.
+ * To add a config page for an indenter there are several todos:
+ * - Derive a class from this class. This widget will be embedded into
+ *   the config dialog.
+ * - Override the slot @p apply(), which is called when the configuration
+ *   needs to be saved.
+ * - Override @p KateAutoIndent::configPage() to return an instance of
+ *   this dialog.
+ * - Return @p true in @p KateAutoIndent::hasConfigPage() for the
+ *   corresponding indenter id.
+ */
+class IndenterConfigPage : public QWidget
+{
+  Q_OBJECT
+
+  public:
+    /**
+     * Standard constructor
+     * @param parent parent widget
+     * @param name name
+     */
+    IndenterConfigPage ( QWidget *parent=0, const char *name=0 ) : QWidget(parent, name) {}
+    virtual ~IndenterConfigPage () {}
+
+  public slots:
+    /**
+     * Apply the changes. Save options here, use @p kapp->config() and
+     * group [Kate Indenter MyIndenter].
+     */
+    virtual void apply () = 0;
+};
+
+/**
+ * Provides Auto-Indent functionality for katepart.
+ * This baseclass is a real dummy, does nothing beside remembering the document it belongs too,
+ * only to have the object around
+ */
+class KateAutoIndent : public QObject
+{
+  Q_OBJECT
+
+  /**
+   * Static methods to create and list indention modes
+   */
+  public:
+    /**
+     * Create an indenter
+     * @param doc document for the indenter
+     * @param mode indention mode wanted
+     * @return created autoindention object
+     */
+    static KateAutoIndent *createIndenter (KateDocument *doc, uint mode);
+
+    /**
+     * List all possible modes by name
+     * @return list of modes
+     */
+    static QStringList listModes ();
+
+    /**
+     * Return the mode name given the mode
+     * @param mode mode index
+     * @return name for this mode index
+     */
+    static QString modeName (uint mode);
+
+    /**
+     * Return the mode description
+     * @param mode mode index
+     * @return mode index
+     */
+    static QString modeDescription (uint mode);
+
+    /**
+     * Maps name -> index
+     * @param name mode name
+     * @return mode index
+     */
+    static uint modeNumber (const QString &name);
+
+    /**
+     * Config page support
+     * @param mode mode index
+     * @return true, if the indenter @p mode has a configuration page
+     */
+    static bool hasConfigPage (uint mode);
+
+    /**
+     * Support for a config page.
+     * @return config page or 0 if not available.
+     */
+    static IndenterConfigPage* configPage(QWidget *parent, uint mode);
+
+  public:
+    /**
+     * Constructor
+     * @param doc parent document
+     */
+    KateAutoIndent (KateDocument *doc);
+
+    /**
+     * Virtual Destructor for the baseclass
+     */
+    virtual ~KateAutoIndent ();
+
+  public slots:
+    /**
+     * Update indenter's configuration (indention width, attributes etc.)
+     */
+    virtual void updateConfig () {};
+
+  public:
+    /**
+     * does this indenter support processNewLine
+     * @return can you do it?
+     */
+    virtual bool canProcessNewLine () const { return false; }
+
+    /**
+     * Called every time a newline character is inserted in the document.
+     *
+     * @param cur The position to start processing. Contains the new cursor position after the indention.
+     * @param needContinue Used to determine whether to calculate a continue indent or not.
+     */
+    virtual void processNewline (KateDocCursor &cur, bool needContinue) { Q_UNUSED(cur); Q_UNUSED(needContinue); }
+
+    /**
+     * Called every time a character is inserted into the document.
+     * @param c character inserted
+     */
+    virtual void processChar (QChar c) { Q_UNUSED(c); }
+
+    /**
+     * Aligns/indents the given line to the proper indent position.
+     */
+    virtual void processLine (KateDocCursor &/*line*/) { }
+
+    /**
+     * Processes a section of text, indenting each line in between.
+     */
+    virtual void processSection (const KateDocCursor &/*begin*/, const KateDocCursor &/*end*/) { }
+
+    /**
+     * Set to true if an actual implementation of 'processLine' is present.
+     * This is used to prevent a needless Undo action from being created.
+     */
+    virtual bool canProcessLine() const { return false; }
+
+    /**
+     * Mode index of this mode
+     * @return modeNumber
+     */
+    virtual uint modeNumber () const { return KateDocumentConfig::imNone; };
+
+  protected:
+    KateDocument *doc;
+};
+
+/**
+ * This action provides a list of available indenters and gets plugged
+ * into the KateView's KActionCollection.
+ */
+class KateViewIndentationAction : public KActionMenu
+{
+  Q_OBJECT
+
+  public:
+    KateViewIndentationAction(KateDocument *_doc, const QString& text, QObject* parent = 0, const char* name = 0);
+
+    ~KateViewIndentationAction(){;};
+
+  private:
+    KateDocument* doc;
+
+  public  slots:
+    void slotAboutToShow();
+
+  private slots:
+    void setMode (int mode);
+};
+
+/**
+ * Provides Auto-Indent functionality for katepart.
+ */
+class KateNormalIndent : public KateAutoIndent
+{
+  Q_OBJECT
+
+public:
+    /**
+     * Constructor
+     * @param doc parent document
+     */
+  KateNormalIndent (KateDocument *doc);
+
+    /**
+     * Virtual Destructor for the baseclass
+     */
+  virtual ~KateNormalIndent ();
+
+public slots:
+    /**
+     * Update indenter's configuration (indention width, attributes etc.)
+     */
+  virtual void updateConfig ();
+
+public:
+    /**
+     * does this indenter support processNewLine
+     * @return can you do it?
+     */
+  virtual bool canProcessNewLine () const { return true; }
+
+    /**
+     * Called every time a newline character is inserted in the document.
+     *
+     * @param cur The position to start processing. Contains the new cursor position after the indention.
+     * @param needContinue Used to determine whether to calculate a continue indent or not.
+     */
+  virtual void processNewline (KateDocCursor &cur, bool needContinue);
+
+    /**
+     * Called every time a character is inserted into the document.
+     * @param c character inserted
+     */
+  virtual void processChar (QChar c) { Q_UNUSED(c); }
+
+    /**
+     * Aligns/indents the given line to the proper indent position.
+     */
+  virtual void processLine (KateDocCursor &/*line*/) { }
+
+    /**
+     * Processes a section of text, indenting each line in between.
+     */
+  virtual void processSection (const KateDocCursor &/*begin*/, const KateDocCursor &/*end*/) { }
+
+    /**
+     * Set to true if an actual implementation of 'processLine' is present.
+     * This is used to prevent a needless Undo action from being created.
+     */
+  virtual bool canProcessLine() const { return false; }
+
+    /**
+     * Mode index of this mode
+     * @return modeNumber
+     */
+  virtual uint modeNumber () const { return KateDocumentConfig::imNormal; };
+
+protected:
+
+    /**
+     * Determines if the characters open and close are balanced between @p begin and @p end
+     * Fills in @p pos with the column position of first opened character if found.
+     *
+     * @param begin Beginning cursor position.
+     * @param end Ending cursor position where the processing will stop.
+     * @param open The open character.
+     * @param close The closing character which should be matched against @p open.
+     * @param pos Contains the position of the first @p open character in the line.
+     * @return True if @p open and @p close have an equal number of occurances between @p begin and @p end. False otherwise.
+     */
+  bool isBalanced (KateDocCursor &begin, const KateDocCursor &end, QChar open, QChar close, uint &pos) const;
+
+    /**
+     * Skip all whitespace starting at @p cur and ending at @p max. Spans lines if @p newline is set.
+     * @p cur is set to the current position afterwards.
+     *
+     * @param cur The current cursor position to start from.
+     * @param max The furthest cursor position that will be used for processing
+     * @param newline Whether we are allowed to span multiple lines when skipping blanks
+     * @return True if @p cur < @p max after processing.  False otherwise.
+     */
+  bool skipBlanks (KateDocCursor &cur, KateDocCursor &max, bool newline) const;
+
+    /**
+     * Measures the indention of the current textline marked by cur
+     * @param cur The cursor position to measure the indent to.
+     * @return The length of the indention in characters.
+     */
+  uint measureIndent (KateDocCursor &cur) const;
+
+    /**
+     * Produces a string with the proper indentation characters for its length.
+     *
+     * @param length The length of the indention in characters.
+     * @return A QString representing @p length characters (factoring in tabs and spaces)
+     */
+  QString tabString(uint length) const;
+
+  uint  tabWidth;     //!< The number of characters simulated for a tab
+  uint  indentWidth;  //!< The number of characters used when tabs are replaced by spaces
+
+public:
+    // Attributes that we should skip over or otherwise know about
+  uchar commentAttrib;
+  uchar doxyCommentAttrib;
+  uchar regionAttrib;
+  uchar symbolAttrib;
+  uchar alertAttrib;
+  uchar tagAttrib;
+  uchar wordAttrib;
+  uchar keywordAttrib;
+  uchar normalAttrib;
+  uchar extensionAttrib;
+  uchar preprocessorAttrib;
+  uchar stringAttrib;
+  uchar charAttrib;
+
+protected:
+  bool  useSpaces;    //!< Should we use spaces or tabs to indent
+  bool  mixedIndent;  //!< Optimize indent by mixing spaces and tabs, ala emacs
+  bool  keepProfile;  //!< Always try to honor the leading whitespace of lines already in the file
+};
+
+class KateCSmartIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    KateCSmartIndent (KateDocument *doc);
+    ~KateCSmartIndent ();
+
+    virtual void processNewline (KateDocCursor &cur, bool needContinue);
+    virtual void processChar (QChar c);
+
+    virtual void processLine (KateDocCursor &line);
+    virtual void processSection (const KateDocCursor &begin, const KateDocCursor &end);
+
+    virtual bool canProcessLine() const { return true; }
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imCStyle; };
+
+  private:
+    uint calcIndent (KateDocCursor &begin, bool needContinue);
+    uint calcContinue (KateDocCursor &begin, KateDocCursor &end);
+    uint findOpeningBrace (KateDocCursor &start);
+    uint findOpeningParen (KateDocCursor &start);
+    uint findOpeningComment (KateDocCursor &start);
+    bool firstOpeningBrace (KateDocCursor &start);
+    bool handleDoxygen (KateDocCursor &begin);
+
+    bool allowSemi;
+    bool processingBlock;
+};
+
+class KatePythonIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    KatePythonIndent (KateDocument *doc);
+    ~KatePythonIndent ();
+
+    virtual void processNewline (KateDocCursor &cur, bool needContinue);
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imPythonStyle; };
+
+  private:
+    int calcExtra (int &prevBlock, int &pos, KateDocCursor &end);
+    void traverseString( const QChar &stringChar, KateDocCursor &cur, KateDocCursor &end );
+
+    static QRegExp endWithColon;
+    static QRegExp stopStmt;
+    static QRegExp blockBegin;
+};
+
+class KateXmlIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    KateXmlIndent (KateDocument *doc);
+    ~KateXmlIndent ();
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imXmlStyle; }
+    virtual void processNewline (KateDocCursor &cur, bool needContinue);
+    virtual void processChar (QChar c);
+    virtual void processLine (KateDocCursor &line);
+    virtual bool canProcessLine() const { return true; }
+    virtual void processSection (const KateDocCursor &begin, const KateDocCursor &end);
+
+  private:
+    // sets the indentation of a single line based on previous line
+    //  (returns indentation width)
+    uint processLine (uint line);
+
+    // gets information about a line
+    void getLineInfo (uint line, uint &prevIndent, int &numTags,
+      uint &attrCol, bool &unclosedTag);
+
+    // useful regular expressions
+    static const QRegExp startsWithCloseTag;
+    static const QRegExp unclosedDoctype;
+};
+
+class KateCSAndSIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    KateCSAndSIndent (KateDocument *doc);
+    ~KateCSAndSIndent ();
+
+    virtual void processNewline (KateDocCursor &begin, bool needContinue);
+    virtual void processChar (QChar c);
+
+    virtual void processLine (KateDocCursor &line);
+    virtual void processSection (const KateDocCursor &begin, const KateDocCursor &end);
+
+    virtual bool canProcessLine() const { return true; }
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imCSAndS; };
+
+  private:
+    void updateIndentString();
+
+    bool inForStatement( int line );
+    int lastNonCommentChar( const KateDocCursor &line );
+    bool startsWithLabel( int line );
+    bool inStatement( const KateDocCursor &begin );
+    QString continuationIndent( const KateDocCursor &begin );
+
+    QString calcIndent (const KateDocCursor &begin);
+    QString calcIndentAfterKeyword(const KateDocCursor &indentCursor, const KateDocCursor &keywordCursor, int keywordPos, bool blockKeyword);
+    QString calcIndentInBracket(const KateDocCursor &indentCursor, const KateDocCursor &bracketCursor, int bracketPos);
+    QString calcIndentInBrace(const KateDocCursor &indentCursor, const KateDocCursor &braceCursor, int bracePos);
+
+    bool handleDoxygen (KateDocCursor &begin);
+    QString findOpeningCommentIndentation (const KateDocCursor &start);
+
+    QString indentString;
+};
+
+/**
+ * This indenter uses document variables to determine when to add/remove indents.
+ *
+ * It attempts to get the following variables from the document:
+ * - var-indent-indent-after: A rerular expression which will cause a line to
+ *   be indented by one unit, if the first non-whitespace-only line above matches.
+ * - var-indent-indent: A regular expression, which will cause a matching line
+ *   to be indented by one unit.
+ * - var-indent-unindent: A regular expression which will cause the line to be
+ *   unindented by one unit if matching.
+ * - var-indent-triggerchars: a list of characters that should cause the
+ *   indentiou to be recalculated immediately when typed.
+ * - var-indent-handle-couples: a list of paren sets to handle. Any combination
+ *   of 'parens' 'braces' and 'brackets'. Each set type is handled
+ *   the following way: If there are unmatched opening instances on the above line,
+ *   one indent unit is added, if there are unmatched closing instances on the
+ *   current line, one indent unit is removed.
+ * - var-indent-couple-attribute: When looking for unmatched couple openings/closings,
+ *   only characters with this attribute is considered. The value must be the
+ *   attribute name from the syntax xml file, for example "Symbol". If it's not
+ *   specified, attribute 0 is used (usually 'Normal Text').
+ *
+ * The idea is to provide a somewhat intelligent indentation for perl, php,
+ * bash, scheme and in general formats with humble indentation needs.
+ */
+class KateVarIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    /**
+     * Purely for readability, couples we know and love
+     */
+    enum pairs {
+      Parens=1,
+      Braces=2,
+      Brackets=4,
+      AngleBrackets=8
+    };
+
+    KateVarIndent( KateDocument *doc );
+    virtual ~KateVarIndent();
+
+    virtual void processNewline (KateDocCursor &cur, bool needContinue);
+    virtual void processChar (QChar c);
+
+    virtual void processLine (KateDocCursor &line);
+    virtual void processSection (const KateDocCursor &begin, const KateDocCursor &end);
+
+    virtual bool canProcessLine() const { return true; }
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imVarIndent; };
+
+  private slots:
+    void slotVariableChanged(const QString&, const QString&);
+
+  private:
+    /**
+     * Check if coupled characters are in balance within one line.
+     * @param line the line to check
+     * @param open the opening character
+     * @param close the closing character
+     * @param attrib the attribute the characters must have, defaults to
+     *               KateAutoIndent::symbolAttrib
+     */
+    int coupleBalance( int line, const QChar &open, const QChar &close ) const;
+
+    /**
+     * @return true if there is a matching opening with the correct attribute
+     * @param end a cursor pointing to the closing character
+     */
+    bool hasRelevantOpening( const KateDocCursor &end ) const;
+
+    class KateVarIndentPrivate *d;
+};
+
+class KateScriptIndent : public KateNormalIndent
+{
+  Q_OBJECT
+
+  public:
+    KateScriptIndent( KateDocument *doc );
+    ~KateScriptIndent();
+
+    virtual void processNewline( KateDocCursor &cur, bool needContinue );
+    virtual void processChar( QChar c );
+
+    virtual void processLine (KateDocCursor &line);
+//     virtual void processSection (const KateDocCursor &begin, const KateDocCursor &end);
+
+    virtual bool canProcessLine() const { return true; }
+
+    virtual uint modeNumber () const { return KateDocumentConfig::imScriptIndent; };
+  private:
+    KateIndentScript m_script;
+};
+
+class ScriptIndentConfigPage : public IndenterConfigPage
+{
+    Q_OBJECT
+
+  public:
+    ScriptIndentConfigPage ( QWidget *parent=0, const char *name=0 );
+    virtual ~ScriptIndentConfigPage ();
+
+  public slots:
+    /**
+     * Apply changes.
+     */
+    virtual void apply ();
+};
+
+#endif
+
+// kate: space-indent on; indent-width 2; replace-tabs on;