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Diffstat (limited to 'src/symbolcompletion.h')
| -rw-r--r-- | src/symbolcompletion.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/symbolcompletion.h b/src/symbolcompletion.h new file mode 100644 index 0000000..6fe57e2 --- /dev/null +++ b/src/symbolcompletion.h @@ -0,0 +1,195 @@ +/*************************************************************************** + * + * Copyright (C) 2005 Elad Lahav (elad_lahav@users.sourceforge.net) + * + * 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 |