X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FBufferView.h;h=ee2de8276e3a597c258d14ea65d8de435068b6ea;hb=d996ec89928efb3042325fa158e1d5547b9eb64d;hp=a144aee136971a57368ce78feeeb6ff3998def24;hpb=5e126d2920df9fd48d24967f7b0a4a04e61aac65;p=lyx.git

diff --git a/src/BufferView.h b/src/BufferView.h
index a144aee136..ee2de8276e 100644
--- a/src/BufferView.h
+++ b/src/BufferView.h
@@ -16,6 +16,7 @@
 #define BUFFER_VIEW_H
 
 #include "DocumentClassPtr.h"
+#include "TexRow.h"
 #include "update_flags.h"
 
 #include "support/strfwd.h"
@@ -32,6 +33,7 @@ class Buffer;
 class Change;
 class CoordCache;
 class Cursor;
+class CursorSlice;
 class DispatchResult;
 class DocIterator;
 class DocumentClass;
@@ -39,9 +41,11 @@ class FuncRequest;
 class FuncStatus;
 class Intl;
 class Inset;
+class PainterInfo;
 class ParIterator;
 class ParagraphMetrics;
 class Point;
+class TexRow;
 class Text;
 class TextMetrics;
 
@@ -54,15 +58,15 @@ enum CursorStatus {
 /// 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), position(0), single_step(1), page_step(1)
+		: min(0), max(0), single_step(1), page_step(1)
 	{}
 	/// Minimum scrollbar position in pixels.
 	int min;
 	/// Maximum scrollbar position in pixels.
 	int max;
-	/// Current position in the document in pixels.
-	int position;
 	/// Line-scroll amount in pixels.
 	int single_step;
 	/// Page-scroll amount in pixels.
@@ -115,9 +119,23 @@ public:
 	 */
 	void processUpdateFlags(Update::flags flags);
 
-	/// move the screen to fit the cursor.
+	/// 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 fitCursor();
+	bool needsFitCursor() const;
+
+	// 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;
+
+	// 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.
@@ -145,7 +163,9 @@ public:
 	void gotoLabel(docstring const & label);
 
 	/// set the cursor based on the given TeX source row.
-	void setCursorFromRow(int 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 *);
@@ -154,11 +174,11 @@ public:
 	void recenter();
 	/// Ensure that the BufferView cursor is visible.
 	/// This method will automatically scroll and update the BufferView
-	/// if needed.
+	/// (metrics+drawing) if needed.
 	void showCursor();
 	/// Ensure the passed cursor \p dit is visible.
 	/// This method will automatically scroll and update the BufferView
-	/// if needed.
+	/// (metrics+drawing) if needed.
 	/// \param recenter Whether the cursor should be centered on screen
 	void showCursor(DocIterator const & dit, bool recenter,
 		bool update);
@@ -230,6 +250,8 @@ public:
 	/// sets cursor.
 	/// This will also open all relevant collapsable 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);
@@ -331,6 +353,13 @@ private:
 	/// \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(PainterInfo & pi);
+
 	/// The minimal size of the document that is visible. Used
 	/// when it is allowed to scroll below the document.
 	int minVisiblePart();