mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-09-19 22:40:26 +00:00
3b404b0023
This patch makes sure that, every time a ParagraphMetrics has its position set, the inset positions for the insets held by this paragraph are remembered too. This is complementary to BufferView::updatePosCache, but I do not have hard evidence that this is required other than to increase robustness. It may help in some cases when scrolling the document (scrollbar, cursor up/down, page up/down).
273 lines
8.7 KiB
C++
273 lines
8.7 KiB
C++
// -*- C++ -*-
|
|
/**
|
|
* \file TextMetrics.h
|
|
* This file is part of LyX, the document processor.
|
|
* Licence details can be found in the file COPYING.
|
|
*
|
|
* \author Lars Gullik Bjønnes
|
|
* \author John Levon
|
|
* \author Abdelrazak Younes
|
|
*
|
|
* Full author contact details are available in file CREDITS.
|
|
*/
|
|
|
|
#ifndef TEXT_METRICS_H
|
|
#define TEXT_METRICS_H
|
|
|
|
#include "Font.h"
|
|
#include "InsetList.h"
|
|
#include "LayoutEnums.h"
|
|
#include "ParagraphMetrics.h"
|
|
|
|
#include "support/types.h"
|
|
|
|
namespace lyx {
|
|
|
|
class BufferView;
|
|
class Cursor;
|
|
class CursorSlice;
|
|
class DocIterator;
|
|
class MetricsInfo;
|
|
class Text;
|
|
|
|
/// A map from a Text to the map of paragraphs metrics
|
|
class TextMetrics
|
|
{
|
|
public:
|
|
/// Default constructor (only here for STL containers).
|
|
TextMetrics() : bv_(0), text_(0), max_width_(0) {}
|
|
/// The only useful constructor.
|
|
TextMetrics(BufferView *, Text *);
|
|
|
|
///
|
|
bool contains(pit_type pit) const;
|
|
///
|
|
ParagraphMetrics const & parMetrics(pit_type) const;
|
|
///
|
|
std::pair<pit_type, ParagraphMetrics const *> first() const;
|
|
///
|
|
std::pair<pit_type, ParagraphMetrics const *> last() const;
|
|
|
|
///
|
|
Dimension const & dimension() const { return dim_; }
|
|
///
|
|
Point const & origin() const { return origin_; }
|
|
|
|
|
|
/// compute text metrics.
|
|
bool metrics(MetricsInfo & mi, Dimension & dim, int min_width = 0);
|
|
|
|
///
|
|
void newParMetricsDown();
|
|
///
|
|
void newParMetricsUp();
|
|
|
|
/// The "nodraw" drawing stage for one single paragraph: set the
|
|
/// positions of the insets contained this paragraph in metrics
|
|
/// cache. Related to BufferView::updatePosCache.
|
|
void updatePosCache(pit_type pit) const;
|
|
|
|
/// Gets the fully instantiated font at a given position in a paragraph
|
|
/// Basically the same routine as Paragraph::getFont() in Paragraph.cpp.
|
|
/// The difference is that this one is used for displaying, and thus we
|
|
/// are allowed to make cosmetic improvements. For instance make footnotes
|
|
/// smaller. (Asger)
|
|
Font displayFont(pit_type pit, pos_type pos) const;
|
|
|
|
/// There are currently two font mechanisms in LyX:
|
|
/// 1. The font attributes in a lyxtext, and
|
|
/// 2. The inset-specific font properties, defined in an inset's
|
|
/// metrics() and draw() methods and handed down the inset chain through
|
|
/// the pi/mi parameters, and stored locally in a lyxtext in font_.
|
|
/// This is where the two are integrated in the final fully realized
|
|
/// font.
|
|
void applyOuterFont(Font &) const;
|
|
|
|
/// is this position in the paragraph right-to-left?
|
|
bool isRTL(CursorSlice const & sl, bool boundary) const;
|
|
/// is between pos-1 and pos an RTL<->LTR boundary?
|
|
bool isRTLBoundary(pit_type pit,
|
|
pos_type pos) const;
|
|
/// would be a RTL<->LTR boundary between pos and the given font?
|
|
bool isRTLBoundary(pit_type pit,
|
|
pos_type pos, Font const & font) const;
|
|
|
|
|
|
/// Rebreaks the given paragraph.
|
|
/// \retval true if a full screen redraw is needed.
|
|
/// \retval false if a single paragraph redraw is enough.
|
|
bool redoParagraph(pit_type const pit);
|
|
/// Clear cache of paragraph metrics
|
|
void clear() { par_metrics_.clear(); }
|
|
/// Is cache of paragraph metrics empty ?
|
|
bool empty() const { return par_metrics_.empty(); }
|
|
|
|
///
|
|
int ascent() const { return dim_.asc; }
|
|
///
|
|
int descent() const { return dim_.des; }
|
|
/// current text width.
|
|
int width() const { return dim_.wid; }
|
|
/// current text height.
|
|
int height() const { return dim_.height(); }
|
|
|
|
///
|
|
int rightMargin(ParagraphMetrics const & pm) const;
|
|
int rightMargin(pit_type const pit) const;
|
|
|
|
///
|
|
void draw(PainterInfo & pi, int x, int y) const;
|
|
|
|
void drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) const;
|
|
|
|
private:
|
|
///
|
|
ParagraphMetrics & parMetrics(pit_type, bool redo_paragraph);
|
|
|
|
/**
|
|
* Returns the left beginning of the text.
|
|
* This information cannot be taken from the layout object, because
|
|
* in LaTeX the beginning of the text fits in some cases
|
|
* (for example sections) exactly the label-width.
|
|
*/
|
|
int leftMargin(pit_type pit, pos_type pos) const;
|
|
int leftMargin(pit_type pit) const;
|
|
|
|
/// the minimum space a manual label needs on the screen in pixels
|
|
int labelFill(Row const & row) const;
|
|
|
|
/// FIXME??
|
|
int labelEnd(pit_type const pit) const;
|
|
|
|
/// sets row.end to the pos value *after* which a row should break.
|
|
/// for example, the pos after which isNewLine(pos) == true
|
|
/// \return true when another row is required (after a newline)
|
|
bool breakRow(Row & row, int right_margin) const;
|
|
|
|
// Expand the alignment of row \param row in paragraph \param par
|
|
LyXAlignment getAlign(Paragraph const & par, Row const & row) const;
|
|
/** this calculates the specified parameters. needed when setting
|
|
* the cursor and when creating a visible row */
|
|
void computeRowMetrics(Row & row, int width) const;
|
|
|
|
/// Set the height of the row (without space above/below paragraph)
|
|
void setRowHeight(Row & row) const;
|
|
// Compute the space on top of a paragraph
|
|
int parTopSpacing(pit_type pit) const;
|
|
// Compute the space below a a paragraph
|
|
int parBottomSpacing(pit_type pit) const;
|
|
|
|
// Helper function for the other checkInsetHit method.
|
|
InsetList::InsetTable * checkInsetHit(pit_type pit, int x, int y);
|
|
|
|
|
|
// Temporary public:
|
|
public:
|
|
/// returns the position near the specified x-coordinate of the row.
|
|
/// x is an absolute screen coord, it is set to the real beginning
|
|
/// of this column. This takes in account horizontal cursor row scrolling.
|
|
pos_type getPosNearX(Row const & row, int & x, bool & boundary) const;
|
|
|
|
/// returns pos in given par at given x coord.
|
|
pos_type x2pos(pit_type pit, int row, int x) const;
|
|
|
|
// FIXME: is there a need for this?
|
|
//int pos2x(pit_type pit, pos_type pos) const;
|
|
|
|
/// returns the row near the specified y-coordinate in a given paragraph
|
|
/// (relative to the screen). If assert_in_view is true, it is made sure
|
|
/// that the row is on screen completely; this might change the given pit.
|
|
Row const & getPitAndRowNearY(int & y, pit_type & pit,
|
|
bool assert_in_view, bool up);
|
|
|
|
/// returns the paragraph number closest to screen y-coordinate.
|
|
/// This method uses the BufferView CoordCache to locate the
|
|
/// paragraph. The y-coodinate is allowed to be off-screen and
|
|
/// the CoordCache will be automatically updated if needed. This is
|
|
/// the reason why we need a non const BufferView.
|
|
pit_type getPitNearY(int y);
|
|
|
|
/// sets cursor recursively descending into nested editable insets
|
|
/**
|
|
\return the inset pointer if x,y is covering that inset
|
|
\param x,y are absolute screen coordinates.
|
|
\param assert_in_view if true the cursor will be set on a row
|
|
that is completely visible
|
|
\param up whether we are going up or down (only used when
|
|
assert_in_view is true
|
|
\retval inset is null if the cursor is positioned over normal
|
|
text in the current Text object. Otherwise it is the inset
|
|
that the cursor points to, like for Inset::editXY.
|
|
*/
|
|
/// FIXME: cleanup to use BufferView::getCoveringInset() and
|
|
/// setCursorFromCoordinates() instead of checkInsetHit().
|
|
Inset * editXY(Cursor & cur, int x, int y,
|
|
bool assert_in_view = false, bool up = true);
|
|
|
|
/// sets cursor only within this Text.
|
|
/// x,y are screen coordinates
|
|
void setCursorFromCoordinates(Cursor & cur, int x, int y);
|
|
|
|
///
|
|
int cursorX(CursorSlice const & cursor, bool boundary) const;
|
|
///
|
|
int cursorY(CursorSlice const & cursor, bool boundary) const;
|
|
|
|
///
|
|
bool cursorHome(Cursor & cur);
|
|
///
|
|
bool cursorEnd(Cursor & cur);
|
|
///
|
|
void deleteLineForward(Cursor & cur);
|
|
|
|
/// is this row the last in the text?
|
|
bool isLastRow(Row const & row) const;
|
|
/// is this row the first in the text?
|
|
bool isFirstRow(Row const & row) const;
|
|
|
|
/// Returns an inset if inset was hit, or 0 if not.
|
|
/// \warning This method is not recursive! It will return the
|
|
/// outermost inset within this Text.
|
|
/// \sa BufferView::getCoveringInset() to get the innermost inset.
|
|
Inset * checkInsetHit(int x, int y);
|
|
|
|
/// calculates the position of a completion popup
|
|
void completionPosAndDim(Cursor const & cur, int & x, int & y,
|
|
Dimension & dim) const;
|
|
|
|
private:
|
|
friend class BufferView;
|
|
|
|
/// The BufferView owner.
|
|
BufferView * bv_;
|
|
|
|
/// The text contents (the model).
|
|
/// \todo FIXME: this should be const.
|
|
Text * text_;
|
|
|
|
/// A map from paragraph index number to paragraph metrics
|
|
typedef std::map<pit_type, ParagraphMetrics> ParMetricsCache;
|
|
///
|
|
mutable ParMetricsCache par_metrics_;
|
|
Dimension dim_;
|
|
int max_width_;
|
|
mutable Point origin_;
|
|
|
|
// temporary public:
|
|
public:
|
|
/// our 'outermost' font.
|
|
/// This is handed down from the surrounding
|
|
/// inset through the pi/mi parameter (pi.base.font)
|
|
/// It is used in applyOuterFont() and setCharFont() for reasons
|
|
/// that are not clear... to hand hand the outermost language and
|
|
/// also for char style apparently.
|
|
Font font_;
|
|
};
|
|
|
|
/// return the default height of a row in pixels, considering font zoom
|
|
int defaultRowHeight();
|
|
|
|
} // namespace lyx
|
|
|
|
#endif // TEXT_METRICS_H
|