* Licence details can be found in the file COPYING.
*
* \author Alfredo Braustein
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
* \author John Levon
- * \author Jürgen Vigna
+ * \author Jürgen Vigna
*
* Full author contact details are available in file CREDITS.
*/
#ifndef BUFFER_VIEW_H
#define BUFFER_VIEW_H
+#include "DocumentClassPtr.h"
+#include "TexRow.h"
+#include "update_flags.h"
+
+#include "support/strfwd.h"
#include "support/types.h"
-#include <boost/utility.hpp>
+namespace lyx {
+
+namespace support { class FileName; }
-#include <string>
+namespace frontend { class Painter; }
+namespace frontend { class GuiBufferViewDelegate; }
class Buffer;
class Change;
-class Encoding;
-class ErrorList;
+class CoordCache;
+class Cursor;
+class CursorSlice;
+class DispatchResult;
+class DocIterator;
+class DocumentClass;
class FuncRequest;
-class InsetBase;
-class InsetOld;
-class Language;
-class LCursor;
-class LyXText;
-class LyXScreen;
-class LyXView;
-class Painter;
+class FuncStatus;
+class Intl;
+class Inset;
+class Length;
class ParIterator;
-class PosIterator;
-class TeXErrors;
-class UpdatableInset;
+class ParagraphMetrics;
+class Point;
+class Row;
+class TexRow;
+class Text;
+class TextMetrics;
+
+enum CursorStatus {
+ CUR_INSIDE,
+ CUR_ABOVE,
+ CUR_BELOW
+};
+/// Scrollbar Parameters.
+struct ScrollbarParameters
+{
+ // These parameters are normalized against the screen geometry and pixel
+ // coordinates. Position 0 corresponds to the top the the screen.
+ ScrollbarParameters()
+ : min(0), max(0), single_step(1), page_step(1)
+ {}
+ /// Minimum scrollbar position in pixels.
+ int min;
+ /// Maximum scrollbar position in pixels.
+ int max;
+ /// Line-scroll amount in pixels.
+ int single_step;
+ /// Page-scroll amount in pixels.
+ int page_step;
+};
+
+/// Screen view of a Buffer.
/**
- * A buffer view encapsulates a view onto a particular
+ * A BufferView encapsulates a view onto a particular
* buffer, and allows access to operate upon it. A view
* is a sliding window of the entire document rendering.
+ * It is the official interface between the LyX core and
+ * the frontend WorkArea.
*
- * Eventually we will allow several views onto a single
- * buffer, but not yet.
+ * \sa WorkArea
+ * \sa Buffer
+ * \sa CoordCache
*/
-class BufferView : boost::noncopyable {
+class BufferView {
public:
- /**
- * Create a view with the given owner main window,
- * of the given dimensions.
- */
- BufferView(LyXView * owner, int x, int y, int w, int h);
-
+ ///
+ explicit BufferView(Buffer & buffer);
+ ///
~BufferView();
- /// set the buffer we are viewing
- void buffer(Buffer * b);
- /// return the buffer being viewed
- Buffer * buffer() const;
-
- /// return the painter object for drawing onto the view
- Painter & painter() const;
- /// return the screen object for handling re-drawing
- LyXScreen & screen() const;
- /// return the owning main view
- LyXView * owner() const;
-
- /// return the visible top y
- int top_y() const;
-
- /// set the visible top y
- void top_y(int);
-
- /// resize event has happened
- void resize();
-
- /// reload the contained buffer
- void reload();
- /// create a new buffer based on template
- bool newFile(std::string const & fname, std::string const & tname,
- bool named = true);
- /// load a buffer into the view
- bool loadLyXFile(std::string const & name, bool tolastfiles = true);
-
- /// fit the user cursor within the visible view
- bool fitCursor();
- /// perform pending painting updates
- void update();
- /// reset the scrollbar to reflect current view position
- void updateScrollbar();
- /// FIXME
- void redoCurrentBuffer();
+ /// return the buffer being viewed.
+ Buffer & buffer();
+ Buffer const & buffer() const;
- /// FIXME
- bool available() const;
+ ///
+ void setFullScreen(bool full_screen) { full_screen_ = full_screen; }
- /// Save the current position as bookmark i
- void savePosition(unsigned int i);
- /// Restore the position from bookmark i
- void restorePosition(unsigned int i);
- /// does the given bookmark have a saved position ?
- bool isSavedPosition(unsigned int i);
+ /// right margin
+ int rightMargin() const;
- /// return the current change at the cursor
- Change const getCurrentChange();
+ /// left margin
+ int leftMargin() const;
- /// return the lyxtext we are using
- LyXText * getLyXText() const;
+ /// return the on-screen size of this length
+ /*
+ * This is a wrapper around Length::inPixels that uses the
+ * bufferview width as width and the EM value of the default
+ * document font.
+ */
+ int inPixels(Length const & len) const;
+
+ /// \return true if the BufferView is at the top of the document.
+ bool isTopScreen() const;
- /// update paragraph dialogs
- void updateParagraphDialog();
+ /// \return true if the BufferView is at the bottom of the document.
+ bool isBottomScreen() const;
- /// return the current encoding at the cursor
- Encoding const * getEncoding() const;
+ /// perform pending metrics updates.
+ /** \c Update::FitCursor means first to do a FitCursor, and to
+ * force an update if screen position changes.
+ * \c Update::Force means to force an update in any case.
+ * \retval true if a screen redraw is needed
+ */
+ void processUpdateFlags(Update::flags flags);
- /// return the parent language of the given inset
- Language const * getParentLanguage(InsetOld * inset) const;
+ /// return true if one shall move the screen to fit the cursor.
+ /// Only to be called with good y coordinates (after a bv::metrics)
+ bool needsFitCursor() const;
- /// replace the currently selected word
- void replaceWord(std::string const & replacestring);
- /// simple replacing. Use the font of the first selected character
- void replaceSelectionWithString(std::string const & str);
+ /// returns true if this row needs to be repainted (to erase caret)
+ bool needRepaint(Text const * text, Row const & row) const;
- /// move cursor to the named label
- void gotoLabel(std::string const & label);
+ // Returns the amount of horizontal scrolling applied to the
+ // top-level row where the cursor lies
+ int horizScrollOffset() const;
+ // Returns the amount of horizontal scrolling applied to the
+ // row of text starting at (pit, pos)
+ int horizScrollOffset(Text const * text,
+ pit_type pit, pos_type pos) const;
- /// undo last action
- void undo();
- /// redo last action
- void redo();
+ // Returns true if the row of text starting at (pit, pos) was scrolled
+ // at the last draw event.
+ bool hadHorizScrollOffset(Text const * text,
+ pit_type pit, pos_type pos) const;
+
+ /// reset the scrollbar to reflect current view position.
+ void updateScrollbar();
+ /// return the Scrollbar Parameters.
+ ScrollbarParameters const & scrollbarParameters() const;
+ /// \return Tool tip for the given position.
+ docstring toolTip(int x, int y) const;
+ /// \return the context menu for the given position.
+ std::string contextMenu(int x, int y) const;
+
+ /// Save the current position as bookmark.
+ /// if idx == 0, save to temp_bookmark
+ void saveBookmark(unsigned int idx);
+ /// goto a specified position, try top_id first, and then bottom_pit.
+ /// \return true if success
+ bool moveToPosition(
+ pit_type bottom_pit, ///< Paragraph pit, used when par_id is zero or invalid.
+ pos_type bottom_pos, ///< Paragraph pit, used when par_id is zero or invalid.
+ int top_id, ///< Paragraph ID, \sa Paragraph
+ pos_type top_pos ///< Position in the \c Paragraph
+ );
+ /// return the current change at the cursor.
+ Change const getCurrentChange() const;
+
+ /// move cursor to the named label.
+ void gotoLabel(docstring const & label);
+
+ /// set the cursor based on the given TeX source row.
+ bool setCursorFromRow(int row);
+ /// set the cursor based on the given start and end TextEntries.
+ bool setCursorFromEntries(TexRow::TextEntry start, TexRow::TextEntry end);
+
+ /// set cursor to the given inset. Return true if found.
+ bool setCursorFromInset(Inset const *);
+ /// Recenters the BufferView such that the passed cursor
+ /// is in the center.
+ void recenter();
+ /// Ensure that the BufferView cursor is visible.
+ /// This method will automatically scroll and update the BufferView
+ /// (metrics+drawing) if needed.
+ void showCursor();
+ /// Ensure the passed cursor \p dit is visible.
+ /// This method will automatically scroll and update the BufferView
+ /// (metrics+drawing) if needed.
+ /// \param recenter Whether the cursor should be centered on screen
+ void showCursor(DocIterator const & dit, bool recenter,
+ bool update);
+ /// Scroll to the cursor.
+ void scrollToCursor();
+ /// Scroll to the cursor.
+ /// \param recenter Whether the cursor should be centered on screen
+ bool scrollToCursor(DocIterator const & dit, bool recenter);
+ /// scroll down document by the given number of pixels.
+ int scrollDown(int pixels);
+ /// scroll up document by the given number of pixels.
+ int scrollUp(int pixels);
+ /// scroll document by the given number of pixels.
+ int scroll(int pixels);
+ /// Scroll the view by a number of pixels.
+ void scrollDocView(int pixels, bool update);
+ /// Set the cursor position based on the scrollbar one.
+ void setCursorFromScrollbar();
+
+ /// return the pixel width of the document view.
+ int workWidth() const;
+ /// return the pixel height of the document view.
+ int workHeight() const;
- /// get the stored error list
- ErrorList const & getErrorList() const;
- /// show the error list to the user
- void showErrorList(std::string const &) const;
- /// set the cursor based on the given TeX source row
- void setCursorFromRow(int row);
+ /// return the inline completion postfix.
+ docstring const & inlineCompletion() const;
+ /// return the number of unique characters in the inline completion.
+ size_t const & inlineCompletionUniqueChars() const;
+ /// return the position in the buffer of the inline completion postfix.
+ DocIterator const & inlineCompletionPos() const;
+ /// make sure inline completion position is OK
+ void resetInlineCompletionPos();
+ /// set the inline completion postfix and its position in the buffer.
+ /// Updates the updateFlags in \c cur.
+ void setInlineCompletion(Cursor const & cur, DocIterator const & pos,
+ docstring const & completion, size_t uniqueChars = 0);
+
+ /// translate and insert a character, using the correct keymap.
+ void translateAndInsert(char_type c, Text * t, Cursor & cur);
+
+ /// \return true if we've made a decision
+ bool getStatus(FuncRequest const & cmd, FuncStatus & flag);
+ /// execute the given function.
+ void dispatch(FuncRequest const & cmd, DispatchResult & dr);
+
+ /// request an X11 selection.
+ /// \return the selected string.
+ docstring const requestSelection();
+ /// clear the X11 selection.
+ void clearSelection();
+
+ /// resize the BufferView.
+ /// \sa WorkArea
+ void resize(int width, int height);
+
+ /// dispatch method helper for \c WorkArea
+ /// \sa WorkArea
+ void mouseEventDispatch(FuncRequest const & ev);
+
+ /// access to anchor.
+ pit_type anchor_ref() const;
- /**
- * Insert an inset into the buffer.
- * Place it in a layout of lout,
+ ///
+ CursorStatus cursorStatus(DocIterator const & dit) const;
+ /// access to full cursor.
+ Cursor & cursor();
+ /// access to full cursor.
+ Cursor const & cursor() const;
+ /// sets cursor.
+ /// This will also open all relevant collapsible insets.
+ void setCursor(DocIterator const &);
+ /// set the selection up to dit.
+ void setCursorSelectionTo(DocIterator const & dit);
+ /// Check deleteEmptyParagraphMechanism and update metrics if needed.
+ /// \retval true if an update was needed.
+ bool checkDepm(Cursor & cur, Cursor & old);
+ /// sets cursor.
+ /// This is used when handling LFUN_MOUSE_PRESS.
+ bool mouseSetCursor(Cursor & cur, bool select = false);
+
+ /// sets the selection.
+ /* When \c backwards == false, set anchor
+ * to \c cur and cursor to \c cur + \c length. When \c
+ * backwards == true, set anchor to \c cur and cursor to \c
+ * cur + \c length.
*/
- bool insertInset(InsetBase * inset, std::string const & lout = std::string());
+ void putSelectionAt(DocIterator const & cur,
+ int length, bool backwards);
- /// Inserts a lyx file at cursor position. return false if it fails
- bool insertLyXFile(std::string const & file);
+ /// selects the item at cursor if its paragraph is empty.
+ bool selectIfEmpty(DocIterator & cur);
- /// FIXME
- bool fitLockedInsetCursor(int x, int y, int asc, int desc);
+ /// update the internal \c ViewMetricsInfo.
+ void updateMetrics();
- /// hide the cursor if it is visible
- void hideCursor();
+ // this is the "nodraw" drawing stage: only set the positions of the
+ // insets in metrics cache.
+ void updatePosCache();
- /// center the document view around the cursor
- void center();
- /// scroll document by the given number of lines of default height
- void scroll(int lines);
- /// Scroll the view by a number of pixels
- void scrollDocView(int);
+ ///
+ TextMetrics const & textMetrics(Text const * t) const;
+ TextMetrics & textMetrics(Text const * t);
+ ///
+ ParagraphMetrics const & parMetrics(Text const *, pit_type) const;
- /// return the pixel width of the document view
- int workWidth() const;
- /// return the pixel height of the document view
- int workHeight() const;
+ ///
+ CoordCache & coordCache();
+ ///
+ CoordCache const & coordCache() const;
+
+ ///
+ Point getPos(DocIterator const & dit) const;
+ /// is the paragraph of the cursor visible ?
+ bool paragraphVisible(DocIterator const & dit) const;
+ /// is the cursor currently visible in the view
+ bool cursorInView(Point const & p, int h) const;
+ /// get the position and height of the caret
+ void caretPosAndHeight(Point & p, int & h) const;
+
+ ///
+ void draw(frontend::Painter & pain, bool paint_caret);
+
+ /// get this view's keyboard map handler.
+ Intl & getIntl();
+ ///
+ Intl const & getIntl() const;
- /// switch between primary and secondary keymaps for RTL entry
- void switchKeyMap();
+ //
+ // Messages to the GUI
+ //
+ /// This signal is emitted when some message shows up.
+ void message(docstring const & msg);
- /// FIXME
- bool ChangeRefsIfUnique(std::string const & from, std::string const & to);
+ /// This signal is emitted when some dialog needs to be shown.
+ void showDialog(std::string const & name);
- /// get the contents of the window system clipboard
- std::string const getClipboard() const;
- /// fill the window system clipboard
- void stuffClipboard(std::string const &) const;
- /// tell the window system we have a selection
- void haveSelection(bool sel);
+ /// This signal is emitted when some dialog needs to be shown with
+ /// some data.
+ void showDialog(std::string const & name, std::string const & data,
+ Inset * inset = 0);
- /// execute the given function
- bool dispatch(FuncRequest const & argument);
-
- /// clear the X selection
- void unsetXSel();
+ /// This signal is emitted when some dialogs needs to be updated.
+ void updateDialog(std::string const & name, std::string const & data);
- /// access to full cursor
- LCursor & cursor();
- /// access to full cursor
- LCursor const & cursor() const;
///
- LyXText * text() const;
+ void setGuiDelegate(frontend::GuiBufferViewDelegate *);
+
+ ///
+ docstring contentsOfPlaintextFile(support::FileName const & f);
+ // Insert plain text file (if filename is empty, prompt for one)
+ void insertPlaintextFile(support::FileName const & f, bool asParagraph);
+ ///
+ void insertLyXFile(support::FileName const & f);
+ /// save temporary bookmark for jump back navigation
+ void bookmarkEditPosition();
+ /// Find and return the inset associated with given dialog name.
+ Inset * editedInset(std::string const & name) const;
+ /// Associate an inset associated with given dialog name.
+ void editInset(std::string const & name, Inset * inset);
///
- void setCursor(ParIterator const & par, lyx::pos_type pos);
+ void clearLastInset(Inset * inset) const;
+ /// Is the mouse hovering a clickable inset or element?
+ bool clickableInset() const;
///
- void putSelectionAt(PosIterator const & cur, int length, bool backwards);
+ void makeDocumentClass();
private:
+ /// noncopyable
+ BufferView(BufferView const &);
+ void operator=(BufferView const &);
+
+ /// the position relative to (0, baseline) of outermost paragraph
+ Point coordOffset(DocIterator const & dit) const;
+ /// Update current paragraph metrics.
+ /// \return true if no further update is needed.
+ bool singleParUpdate();
+
+ // Set the row on which the cursor lives.
+ void setCurrentRowSlice(CursorSlice const & rowSlice);
+
+ // Check whether the row where the cursor lives needs to be scrolled.
+ // Update the drawing strategy if needed.
+ void checkCursorScrollOffset();
+
+ /// The minimal size of the document that is visible. Used
+ /// when it is allowed to scroll below the document.
+ int minVisiblePart();
+
+ /// Search recursively for the innermost inset that covers (x, y) position.
+ /// \retval 0 if no inset is found.
+ Inset const * getCoveringInset(
+ Text const & text, //< The Text where we start searching.
+ int x, //< x-coordinate on screen
+ int y //< y-coordinate on screen
+ ) const;
+
+ /// Update the hovering status of the insets. This is called when
+ /// either the screen is updated or when the buffer has scolled.
+ void updateHoveredInset() const;
+
+ ///
+ void updateDocumentClass(DocumentClassConstPtr olddc);
///
- struct Pimpl;
+ int width_;
///
- friend struct BufferView::Pimpl;
+ int height_;
///
- Pimpl * pimpl_;
+ bool full_screen_;
+ ///
+ Buffer & buffer_;
+
+ struct Private;
+ Private * const d;
};
+/// some space for drawing the 'nested' markers (in pixel)
+inline int nestMargin() { return 15; }
+
+/// margin for changebar
+inline int changebarMargin() { return 12; }
+
+} // namespace lyx
+
#endif // BUFFERVIEW_H
projects / lyx.git / blobdiff