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/***************************************************************************
*
* Copyright (C) 2005 Elad Lahav ([email protected])
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***************************************************************************/
#ifndef SYMBOLCOMPLETION_H
#define SYMBOLCOMPLETION_H
#include <qobject.h>
#include <qregexp.h>
#include <ktexteditor/codecompletioninterface.h>
#include <ktexteditor/view.h>
#include "cscopefrontend.h"
/**
* This class executes symbol definition queries based on symbol prefixes.
* The results can then be displayed as symbol completion lists.
* @author Albert Yosher
*/
class SymbolCompletion : public QObject
{
Q_OBJECT
public:
/**
* A pure-virtual class that allows a SymbolCompletion object access to
* text-editing objects.
* Classes that wish to utilise SymbolCompletion need to inplement this
* interface.
* @author Albert Yosher
*/
struct Interface
{
/**
* Class destructor.
* NOTE: A virtual destructor is required by GCC 4.0
*/
virtual ~Interface() {}
/**
* Returns the word currently under the editing cursor.
* Symbol completion will be provided for this word only if the cursor
* is positioned at the end of this word.
* @param pPosInWord Set this value to the offset in the word on
* which the cursor is positioned
*/
virtual QString getWordUnderCursor(uint* pPosInWord) = 0;
/**
* Returns a target object for displaying the completion list.
* @return A pointer to an object implementing
* KTextEditor::CodeCompletionInterface, or NULL if the
* implementation does not support this interface.
*/
virtual QObject* getCCObject() = 0;
};
SymbolCompletion(SymbolCompletion::Interface*, QObject* pParent = 0,
const char* szName = 0);
~SymbolCompletion();
void abort();
static void initAutoCompletion(bool, uint, uint, uint);
public slots:
void slotComplete();
void slotAutoComplete();
private:
/**
* Symbol completion entry object, used in the completion list.
* Implements operators required for sorting the completion list.
* @author Albert Yosher
*/
class Entry : public KTextEditor::CompletionEntry
{
public:
/**
* Determines whether a given entry is smaller than this one.
* @param entry The entry to compare with
* @return true if the given entry is smaller, false otherwise
*/
bool operator < (const SymbolCompletion::Entry& entry) const {
return (text < entry.text);
}
/**
* Determines whether a given entry is equal to this one.
* @param entry The entry to compare with
* @return true if the given entry equals this one, false otherwise
*/
bool operator == (const SymbolCompletion::Entry& entry) const {
return (text == entry.text);
}
};
/**
* A sortable version of the value list used by CodeCompletionInterface.
* @author Albert Yosher
*/
class EntryList : public QValueList<Entry>
{
public:
/**
* Sorts completion list.
*/
void sort() { qHeapSort(*this); }
/**
* Type casting support required for calling showCompletionBox().
* @return A casted reference to this object
*/
operator QValueList<KTextEditor::CompletionEntry>()
{ return *(QValueList<KTextEditor::CompletionEntry>*)this; }
};
/** Editor object for which symbol completion is provided. */
Interface* m_pEditor;
/** An object that supports KTextEditor::CodeCompletionInterface, as
supplied by the editor. */
QObject* m_pCCObject;
/** Cscope process used to run completion queries. */
CscopeFrontend* m_pCscope;
/** The prefix used for the current query. */
QString m_sPrefix;
/** A list of possible completions for the given prefix. */
EntryList m_elEntries;
/** The maximal number of completions to accept. */
uint m_nMaxEntries;
/** Regular expression for extracting a symbol out of Cscope's text field.
NOTE: This member is required due to a bug in Cscope that renders the
symbol field useless. */
QRegExp m_reSymbol;
/** Auto-completion timer. */
QTimer* m_pAutoCompTimer;
/** Auto-completion flag */
bool m_bAutoCompletion;
void complete(const QString&, int nMaxEntries = 1000);
void filterEntries();
void makeErrMsg(const QString&);
/** true if auto-completion is enabled, false otherwise. */
static bool s_bACEnabled;
/** The minimum number of characters a symbol must have for
auto-completion. */
static uint s_nACMinChars;
/** The interval between the time slotAutoComplete() is called and the
time the completion process begins (in milliseconds). */
static uint s_nACDelay;
/** The maximal number of entries for auto-completion. */
static uint s_nACMaxEntries;
private slots:
void slotAutoCompleteTimeout();
void slotAddEntry(FrontendToken*);
void slotQueryFinished(uint);
void slotFilterInsert(KTextEditor::CompletionEntry*, QString*);
};
#endif
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