8ebf77d13b
2000-10-02 Havoc Pennington <hp@pobox.com> * gtk/gtktextview.c: text_window_* weren't static and should have been. Start work on child widgets; not yet complete, syncing to office computer. * gtk/gtktextchild.h: change this to contain a public interface, starting work on child interfaces. * gtk/gtktextchildprivate.h: move private interfaces here * gtk/Makefile.am: update to reflect gtktextchildprivate.h * gtk/gtktextview.h, gtk/gtktextview.c, gtk/gtktextbuffer.h, gtk/gtktextbuffer.c, gtk/gtktextiter.h, gtk/gtk/textiter.c, gtk/gtktextmark.c: copyright notices * gtk/gtktextmarkprivate.h: reformat, and put _ in front of internal functions * gtk/gtktextchild.c (_pixbuf_segment_new): put _ in front of internal function * gtk/gtktextlayout.c (gtk_text_layout_get_line_display): Reformatting
150 lines
6.7 KiB
C
150 lines
6.7 KiB
C
#ifndef GTK_TEXT_SEGMENT_H
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#define GTK_TEXT_SEGMENT_H
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#include <gtk/gtktexttag.h>
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#include <gtk/gtktextiter.h>
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#include <gtk/gtktextmarkprivate.h>
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#include <gtk/gtktextchild.h>
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#include <gtk/gtktextchildprivate.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/*
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* Segments: each line is divided into one or more segments, where each
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* segment is one of several things, such as a group of characters, a
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* tag toggle, a mark, or an embedded widget. Each segment starts with
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* a standard header followed by a body that varies from type to type.
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*/
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/* This header has the segment type, and two specific segments
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(character and toggle segments) */
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/* Information a BTree stores about a tag. */
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typedef struct _GtkTextTagInfo GtkTextTagInfo;
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struct _GtkTextTagInfo {
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GtkTextTag *tag;
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GtkTextBTreeNode *tag_root; /* highest-level node containing the tag */
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gint toggle_count; /* total toggles of this tag below tag_root */
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};
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/* Body of a segment that toggles a tag on or off */
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struct _GtkTextToggleBody {
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GtkTextTagInfo *info; /* Tag that starts or ends here. */
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gboolean inNodeCounts; /* TRUE means this toggle has been
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* accounted for in node toggle
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* counts; FALSE means it hasn't, yet. */
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};
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/* Class struct for segments */
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/* Split seg at index, returning list of two new segments, and freeing seg */
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typedef GtkTextLineSegment* (*GtkTextSegSplitFunc) (GtkTextLineSegment *seg,
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gint index);
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/* Delete seg which is contained in line; if tree_gone, the tree is being
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* freed in its entirety, which may matter for some reason (?)
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* Return TRUE if the segment is not deleteable, e.g. a mark.
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*/
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typedef gboolean (*GtkTextSegDeleteFunc) (GtkTextLineSegment *seg,
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GtkTextLine *line,
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gboolean tree_gone);
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/* Called after segment structure of line changes, so segments can
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* cleanup (e.g. merge with adjacent segments). Returns a segment list
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* to replace the original segment list with. The line argument is
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* the current line.
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*/
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typedef GtkTextLineSegment* (*GtkTextSegCleanupFunc) (GtkTextLineSegment *seg,
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GtkTextLine *line);
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/* Called when a segment moves from one line to another. CleanupFunc is also
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* called in that case, so many segments just use CleanupFunc, I'm not sure
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* what's up with that (this function may not be needed...)
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*/
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typedef void (*GtkTextSegLineChangeFunc) (GtkTextLineSegment *seg,
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GtkTextLine *line);
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/* Called to do debug checks on the segment. */
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typedef void (*GtkTextSegCheckFunc) (GtkTextLineSegment *seg,
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GtkTextLine *line);
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struct _GtkTextLineSegmentClass {
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char *name; /* Name of this kind of segment. */
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gboolean leftGravity; /* If a segment has zero size (e.g. a
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* mark or tag toggle), does it
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* attach to character to its left
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* or right? 1 means left, 0 means
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* right. */
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GtkTextSegSplitFunc splitFunc; /* Procedure to split large segment
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* into two smaller ones. */
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GtkTextSegDeleteFunc deleteFunc; /* Procedure to call to delete
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* segment. */
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GtkTextSegCleanupFunc cleanupFunc; /* After any change to a line, this
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* procedure is invoked for all
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* segments left in the line to
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* perform any cleanup they wish
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* (e.g. joining neighboring
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* segments). */
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GtkTextSegLineChangeFunc lineChangeFunc;
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/* Invoked when a segment is about
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* to be moved from its current line
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* to an earlier line because of
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* a deletion. The line is that
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* for the segment's old line.
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* CleanupFunc will be invoked after
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* the deletion is finished. */
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GtkTextSegCheckFunc checkFunc; /* Called during consistency checks
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* to check internal consistency of
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* segment. */
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};
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/*
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* The data structure below defines line segments.
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*/
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struct _GtkTextLineSegment {
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GtkTextLineSegmentClass *type; /* Pointer to record describing
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* segment's type. */
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GtkTextLineSegment *next; /* Next in list of segments for this
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* line, or NULL for end of list. */
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int char_count; /* # of chars of index space occupied */
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int byte_count; /* Size of this segment (# of bytes
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* of index space it occupies). */
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union {
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char chars[4]; /* Characters that make up character
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* info. Actual length varies to
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* hold as many characters as needed.*/
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GtkTextToggleBody toggle; /* Information about tag toggle. */
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GtkTextMarkBody mark; /* Information about mark. */
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GtkTextPixbuf pixbuf; /* Child pixbuf */
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GtkTextChildBody child; /* Child widget */
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} body;
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};
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GtkTextLineSegment *gtk_text_line_segment_split (const GtkTextIter *iter);
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GtkTextLineSegment *char_segment_new (const gchar *text,
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guint len);
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GtkTextLineSegment *char_segment_new_from_two_strings (const gchar *text1,
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guint len1,
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const gchar *text2,
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guint len2);
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GtkTextLineSegment *toggle_segment_new (GtkTextTagInfo *info,
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gboolean on);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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