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Diffstat (limited to 'src/editorpage.cpp')
| -rw-r--r-- | src/editorpage.cpp | 720 |
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diff --git a/src/editorpage.cpp b/src/editorpage.cpp new file mode 100644 index 0000000..5c183b9 --- /dev/null +++ b/src/editorpage.cpp @@ -0,0 +1,720 @@ +/*************************************************************************** + * + * 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. + * + ***************************************************************************/ + +#include <qfileinfo.h> +#include <kdeversion.h> +#include <ktexteditor/selectioninterface.h> +#include <ktexteditor/viewcursorinterface.h> +#include <ktexteditor/popupmenuinterface.h> +#include <ktexteditor/editinterface.h> +#include <kate/document.h> +#include <kate/view.h> +#include "editorpage.h" +#include "kscopeconfig.h" + +/** + * Class constructor. + * @param pDoc The document object associated with this page + * @param pMenu A Cscope queries popup menu to use with the editor + * @param pParent The parent widget + * @param szName The widget's name + */ +EditorPage::EditorPage(KTextEditor::Document* pDoc, QPopupMenu* pMenu, + QTabWidget* pParent, const char* szName) : QHBox(pParent, szName), + m_pParentTab(pParent), + m_pDoc(pDoc), + m_bOpen(false), + m_bNewFile(false), + m_sName(""), + m_bWritable(true), /* new documents are writable by default */ + m_bModified(false), + m_nLine(0), + m_bSaveNewSizes(false) +{ + KTextEditor::PopupMenuInterface* pMenuIf; + KTextEditor::ViewCursorInterface* pCursorIf; + + // Create code-completion objects (will be deleted by QObject destructor) + m_pCompletion = new SymbolCompletion(this, this); + + // Set read-only mode, if required + if (Config().getReadOnlyMode()) + m_pDoc->setReadWrite(false); + + // Create the child widgets + m_pSplit = new QSplitter(this); + m_pCtagsList = new CtagsList(m_pSplit); + m_pView = m_pDoc->createView(m_pSplit); + m_pSplit->setResizeMode(m_pCtagsList, QSplitter::KeepSize); + + // Perform tasks only when the document has been loaded completely + connect(m_pDoc, SIGNAL(completed()), this, SLOT(slotFileOpened())); + + // Be notified when the text in the editor changes + connect(m_pDoc, SIGNAL(textChanged()), this, SLOT(slotSetModified())); + connect(m_pDoc, SIGNAL(undoChanged()), this, SLOT(slotUndoChanged())); + + // Store the sizes of the child windows when the tag list is resized + // (since it may imply a move of the splitter divider) + connect(m_pCtagsList, SIGNAL(resized()), this, SLOT(slotChildResized())); + + // Go to a symbol's line if it is selected in the tag list + connect(m_pCtagsList, SIGNAL(lineRequested(uint)), this, + SLOT(slotGotoLine(uint))); + + // Add Ctag records to the tag list + connect(&m_ctags, SIGNAL(dataReady(FrontendToken*)), m_pCtagsList, + SLOT(slotDataReady(FrontendToken*))); + + // Monitor Ctags' operation + connect(&m_ctags, SIGNAL(finished(uint)), m_pCtagsList, + SLOT(slotCtagsFinished(uint))); + + // Set the context menu + pMenuIf = dynamic_cast<KTextEditor::PopupMenuInterface*>(m_pView); + if (pMenuIf) + pMenuIf->installPopup(pMenu); + + // Emit a signal whenever the cursor's position changes + pCursorIf = dynamic_cast<KTextEditor::ViewCursorInterface*>(m_pView); + if (pCursorIf) { + connect(m_pView, SIGNAL(cursorPositionChanged()), this, + SLOT(slotCursorPosChange())); + } +} + +/** + * Class destructor. + */ +EditorPage::~EditorPage() +{ +} + +/** + * Returns a pointer to the editor document object embedded in this page. + * @returns the document pointer + */ +KTextEditor::Document* EditorPage::getDocument() +{ + return m_pDoc; +} + +/** + * Returns a pointer to the editor view object embedded in this page. + * @returns the view pointer + */ +KTextEditor::View* EditorPage::getView() +{ + return m_pView; +} + +/** + * Returns the full path of the file being edited. + * @return The path of the file associated with the Document object, empty + * string if no file is currently open + */ +QString EditorPage::getFilePath() +{ + return m_pDoc->url().path(); +} + +/** + * Returns the name of the file being edited. + * @return The name of the file associated with the Document object, empty + * string if no file is currently open + */ +QString EditorPage::getFileName() +{ + return m_sName; +} + +/** + * Determines whether this file can be modified, according to the file-system + * permissions, and KScope's global settings. + * @return true if this document can be changed, false otherwise + */ +bool EditorPage::isWritable() +{ + // Check global settings first + if (Config().getReadOnlyMode()) + return false; + + // Return FS write permissions + return m_bWritable; +} + +/** + * Determines if the file edited in this page was modified, and the changes + * were not yet saved. + * @return true if the file was modified, false otherwise + */ +bool EditorPage::isModified() +{ + return m_pDoc->isModified(); +} + +/** + * Opens a file for editing. + * @param sFileName The full path name of the file to edit. + */ +void EditorPage::open(const QString& sFileName) +{ + // Open the given file + m_bOpen = false; + m_pDoc->openURL(sFileName); +} + +/** + * Marks the page as containing a new unnamed file. + */ +void EditorPage::setNewFile() +{ + m_bNewFile = true; + emit newFile(this); +} + +/** + * Saves the edited file. + */ +void EditorPage::save() +{ + if (m_pDoc->isModified()) + m_pDoc->save(); +} + +/** + * Closes an edited file. + * @param bForce true to close the file regardless of any modifications, + * false to prompt the user in case of unsaved chnages + * @return true if the file has been closed, false if the user has aborted + */ +bool EditorPage::close(bool bForce) +{ + QString sPath; + + // To override the prompt-on-close behaviour, we need to mark the file + // as unmodified + if (bForce) + m_pDoc->setModified(false); + + // Close the file, unless the user aborts the action + sPath = m_pDoc->url().path(); + if (!m_pDoc->closeURL()) + return false; + + emit fileClosed(sPath); + return true; +} + +/** + * Applies any changes to the user preferences concerning an editor window. + */ +void EditorPage::applyPrefs() +{ + // Determine whether the editor should work in a read-only mode + if (m_bWritable) + m_pDoc->setReadWrite(!Config().getReadOnlyMode()); + + // Apply preferences to the tag list of this window + m_pCtagsList->applyPrefs(); +} + +/** + * Sets the keyboard focus to the editor part of the page. + * This method is called whenever the page is activated. It is more reasonable + * to set the focus to the editor than to the tag list. + */ +void EditorPage::setEditorFocus() +{ + m_pView->setFocus(); + slotCursorPosChange(); +} + +/** + * Sets the keyboard focus to the tag list. + * This method is called when the "Go To Tag" menu command is invoked. + */ +void EditorPage::setTagListFocus() +{ + m_pCtagsList->slotSetFocus(); +} + +/** + * Sets a bookmark at the given line. + * @param nLine The line to mark + */ +void EditorPage::addBookmark(uint nLine) +{ + KTextEditor::MarkInterface* pMarkIf; + + pMarkIf = dynamic_cast<KTextEditor::MarkInterface*>(m_pDoc); + if (pMarkIf) + pMarkIf->setMark(nLine, KTextEditor::MarkInterface::markType01); +} + +/** + * Retrieves a list of all bookmarks in this page. + */ +void EditorPage::getBookmarks(FileLocationList& fll) +{ + KTextEditor::MarkInterface* pMarkIf; + QPtrList<KTextEditor::Mark> plMarks; + KTextEditor::Mark* pMark; + + // Get the marks interface + pMarkIf = dynamic_cast<KTextEditor::MarkInterface*>(m_pDoc); + if (!pMarkIf) + return; + + // Find all bookmarks + plMarks = pMarkIf->marks(); + for (pMark = plMarks.first(); pMark; pMark = plMarks.next()) { + if (pMark->type == KTextEditor::MarkInterface::markType01) + fll.append(new FileLocation(getFilePath(), pMark->line, 0)); + } +} + +/** + * Returns the currently selected text in an open file. + * @return The selected text, or a null string if no text is currently + * selected + */ +QString EditorPage::getSelection() +{ + KTextEditor::SelectionInterface* pSelect; + + // Get the selected text + pSelect = dynamic_cast<KTextEditor::SelectionInterface*>(m_pDoc); + if (!pSelect || !pSelect->hasSelection()) + return QString::null; + + // Return the selected text + return pSelect->selection(); +} +/** + * Returns a the complete word defined by the current cursor position. + * Attempts to extract a valid C symbol from the location of the cursor, by + * starting at the current line and column, and looking forward and backward + * for non-symbol characters. + * @return A C symbol under the cursor, if any, or QString::null otherwise + */ +QString EditorPage::getWordUnderCursor(uint* pPosInWord) +{ + KTextEditor::ViewCursorInterface* pCursor; + KTextEditor::EditInterface* pEditIf; + QString sLine; + uint nLine, nCol, nFrom, nTo, nLast, nLength; + QChar ch; + + // Get a cursor object + pCursor = dynamic_cast<KTextEditor::ViewCursorInterface*>(m_pView); + if (pCursor == NULL) + return QString::null; + + // Get a pointer to the edit interface + pEditIf = dynamic_cast<KTextEditor::EditInterface*>(m_pDoc); + if (!pEditIf) + return QString::null; + + // Get the line on which the cursor is positioned + pCursor->cursorPositionReal(&nLine, &nCol); + sLine = pEditIf->textLine(nLine); + + // Find the beginning of the current word + for (nFrom = nCol; nFrom > 0;) { + ch = sLine.at(nFrom - 1); + if (!ch.isLetter() && !ch.isDigit() && ch != '_') + break; + + nFrom--; + } + + // Find the end of the current word + nLast = sLine.length(); + for (nTo = nCol; nTo < nLast;) { + ch = sLine.at(nTo); + if (!ch.isLetter() && !ch.isDigit() && ch != '_') + break; + + nTo++; + } + + // Mark empty words + nLength = nTo - nFrom; + if (nLength == 0) + return QString::null; + + // Return the in-word position, if required + if (pPosInWord != NULL) + *pPosInWord = nCol - nFrom; + + // Extract the word under the cursor from the entire line + return sLine.mid(nFrom, nLength); +} + +/** + * Combines getSelection() and getWordUnderCursor() to return a suggested + * text for queries. + * The function first looks if any text is selected. If so, the selected text + * is returned. Otherwise, the word under the cursor location is returned, if + * one exists. + * @return Either the currently selected text, or the word under the cursor, + * or QString::null if both options fail + */ +QString EditorPage::getSuggestedText() +{ + QString sText; + + sText = getSelection(); + if (sText == QString::null) + sText = getWordUnderCursor(); + + return sText; +} + +/** + * Returns the contents of the requested line. + * Truncates the leading and trailing white spaces. + * @param nLine The line number + * @return The text of the requested line, if successful, QString::null + * otherwise + */ +QString EditorPage::getLineContents(uint nLine) +{ + KTextEditor::EditInterface* pEditIf; + QString sLine; + + // Cannot accept line 0 + if (nLine == 0) + return QString::null; + + // Get a pointer to the edit interface + pEditIf = dynamic_cast<KTextEditor::EditInterface*>(m_pDoc); + if (!pEditIf) + return QString::null; + + // Get the line on which the cursor is positioned + sLine = pEditIf->textLine(nLine - 1); + return sLine.stripWhiteSpace(); +} + +/** + * Moves the editing caret to the beginning of a given line. + * @param nLine The line number to move to + */ +void EditorPage::slotGotoLine(uint nLine) +{ + // Ensure there is an open document + if (!m_bOpen) + return; + + // Set the cursor to the requested line + if (!setCursorPos(nLine)) + return; + + // Update Ctags view + m_pCtagsList->gotoLine(nLine); + + // Set the focus to the selected line + m_pView->setFocus(); +} + +/** + * Sets this editor as the current page, when the edited file's name is + * selected in the "Window" menu. + */ +void EditorPage::slotMenuSelect() +{ + m_pParentTab->setCurrentPage(m_pParentTab->indexOf(this)); +} + +/** + * Displays a list of possible completions for the symbol currently under the + * cursor. + */ +void EditorPage::slotCompleteSymbol() +{ + m_pCompletion->slotComplete(); +} + +/** + * Stores the sizes of the child widgets whenever they are changed. + * This slot is connected to the resized() signal of the CtagsList child + * widget. + */ +void EditorPage::slotChildResized() +{ + SPLIT_SIZES si; + + // Only store sizes when allowed to + if (!m_bSaveNewSizes) { + m_bSaveNewSizes = true; + return; + } + + // Get the current widths of the child widgets + si = m_pSplit->sizes(); + if (si.count() == 2) + Config().setEditorSizes(si); +} + +/** + * Sets the visibility status and sizes of the child widgets. + * @param bShowTagList true to show the tag list, false otherwise + * @param si The new sizes to use + */ +void EditorPage::setLayout(bool bShowTagList, const SPLIT_SIZES& si) +{ + // Make sure sizes are not stored during this process + m_bSaveNewSizes = false; + + // Adjust the layout + m_pCtagsList->setShown(bShowTagList); + if (bShowTagList) + m_pSplit->setSizes(si); +} + +/** + * Returns the current position of the cursor. + * @param nLine Holds the line on which the cursor is currently located + * @param nCol Holds the column on which the cursor is currently located + * @return true if successful, false otherwise (cursor interface was not + * obtained) + */ +bool EditorPage::getCursorPos(uint& nLine, uint& nCol) +{ + KTextEditor::ViewCursorInterface* pCursorIf; + + // Acquire the view cursor + pCursorIf = dynamic_cast<KTextEditor::ViewCursorInterface*>(m_pView); + if (pCursorIf == NULL) + return false; + + // Get the cursor position (adjusted to 1-based counting) + pCursorIf->cursorPosition(&nLine, &nCol); + nLine++; + nCol++; + + return true; +} + +/** + * Moves the cursor to a given position. + * @param nLine The cursor's new line number + * @param nCol The cursor's new column number + * @return true if successful, false otherwise (cursor interface was not + * obtained) + */ +bool EditorPage::setCursorPos(uint nLine, uint nCol) +{ + Kate::View* pKateView; + KTextEditor::ViewCursorInterface* pCursorIf; + + // Cannot accept line 0 + if (nLine == 0) + return false; + + // Adjust to 0-based counting + nLine--; + nCol--; + + // Acquire the view cursor + pCursorIf = dynamic_cast<KTextEditor::ViewCursorInterface*>(m_pView); + if (pCursorIf == NULL) + return false; + + // NOTE: The following code is a fix to a bug in Kate, which wrongly + // calculates the column number in setCursorPosition. + pKateView = dynamic_cast<Kate::View*>(m_pView); + if (pKateView != NULL) { + KTextEditor::EditInterface* pEditIf; + const char* szLine; + uint nRealCol; + uint nTabAdjust; + + // Get a pointer to the edit interface + pEditIf = dynamic_cast<KTextEditor::EditInterface*>(m_pDoc); + if (!pEditIf) + return false; + + nRealCol = 0; + + // Check for out of bound line numbers + if (nLine < pEditIf->numLines()) { + // Get the contents of the requested line + szLine = pEditIf->textLine(nLine).latin1(); + + // Check for empty line + if (szLine != NULL) { + // The number of columns which a tab character adds + nTabAdjust = pKateView->tabWidth() - 1; + + // Calculate the real column, based on the tab width + for (; nRealCol < nCol && szLine[nRealCol] != 0; nRealCol++) { + if (szLine[nRealCol] == '\t') + nCol -= nTabAdjust; + } + } + } + else { + // Marker set beyond end of file, move to the last line + nLine = pEditIf->numLines() - 1; + } + // Set the cursor position + pCursorIf->setCursorPositionReal(nLine, nRealCol); + } + else { + // Non-Kate editors: set the cursor position normally + pCursorIf->setCursorPosition(nLine, nCol); + } + + return true; +} + +void EditorPage::setTabWidth(uint nTabWidth) +{ + Kate::Document* pKateDoc; + Kate::Command* pKateCmd; + QString sCmd, sResult; + + pKateDoc = dynamic_cast<Kate::Document*>(m_pDoc); + if ((pKateDoc) && + (pKateCmd = pKateDoc->queryCommand("set-tab-width"))) { + sCmd.sprintf("set-tab-width %u", nTabWidth); + pKateCmd->exec((Kate::View*)m_pView, sCmd, sResult); + } +} + +/** + * Called when a document has completed loading. + * Determines the file's properties and refreshes the tag list of the editor + * window. + * This slot is connected to the completed() signal of the document object. + * The signal is emitted when a new file is opened, or when a modified file is + * saved. + */ +void EditorPage::slotFileOpened() +{ + QFileInfo fi(m_pDoc->url().path()); + + // Get file information + m_sName = fi.fileName(); + m_bWritable = fi.isWritable(); + + // Set read/write or read-only mode + m_pDoc->setReadWrite(!Config().getReadOnlyMode() && m_bWritable); + + // Refresh the tag list + m_pCtagsList->clear(); + m_ctags.run(m_pDoc->url().path()); + + // Check if this is a modified file that has just been saved + if (m_bModified) + emit fileSaved(m_pDoc->url().path(), m_bNewFile); + + // Notify that the document has loaded + m_bOpen = true; + m_bModified = false; + emit fileOpened(this, m_pDoc->url().path()); + + // Set initial position of the cursor + m_nLine = 0; + slotCursorPosChange(); + + // This is no longer a new file + m_bNewFile = false; +} + +/** + * Marks a file as modified when the contents of the editor change. + * This slot is conncted to the textChanged() signal of the Document object. + * In addition to marking the file, this method also emits the modified() + * signal. + */ +void EditorPage::slotSetModified() +{ + // Only perform tasks if the file is not already marked + if (!m_bModified && m_pDoc->isModified()) { + m_bModified = true; + emit modified(this, m_bModified); + +#if KDE_IS_VERSION(3,3,0) + Kate::DocumentExt* pKateDoc; + + // If the editor is a Kate part, check whether it was modified on + // disk as well, and issue a warning if so + pKateDoc = dynamic_cast<Kate::DocumentExt*>(m_pDoc); + if (pKateDoc) + pKateDoc->slotModifiedOnDisk(dynamic_cast<Kate::View*>(m_pView)); +#endif + } + + // Start/restart the auto-completion timer + m_pCompletion->slotAutoComplete(); +} + +/** + * Marks a file as not modified if all undo levels have been applied. + * This slot is conncted to the undoChanged() signal of the Document object. + * In addition to marking the file, this method also emits the modified() + * signal. + */ +void EditorPage::slotUndoChanged() +{ + // Check if the file contents have been fully restored + if (m_bModified && !m_pDoc->isModified()) { + m_bModified = false; + emit modified(this, m_bModified); + } +} + +/** + * Handles changes in the cursor position. + * Emits a signal with the new line and column numbers. + */ +void EditorPage::slotCursorPosChange() +{ + uint nLine, nCol; + + // Find the new line and column number, and emit the signal + if (!getCursorPos(nLine, nCol)) + return; + + emit cursorPosChanged(nLine, nCol); + + // Select the relevant symbol in the tag list + if (Config().getAutoTagHl() && (m_nLine != nLine)) { + m_pCtagsList->gotoLine(nLine); + m_nLine = nLine; + } + + // Abort code completion on cursor changes during the completion + // process + m_pCompletion->abort(); +} + +#include "editorpage.moc" |