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-rw-r--r--src/wrap.h144
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diff --git a/src/wrap.h b/src/wrap.h
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-/*
- * wrap.h
- *
- * Text wrapping, hyphenation, justification and shaping
- *
- * Copyright © 2014-2016 Thomas White <taw@bitwiz.org.uk>
- *
- * This file is part of Colloquium.
- *
- * Colloquium is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef WRAP_H
-#define WRAP_H
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "frame.h"
-#include "sc_interp.h"
-#include "presentation.h"
-
-
-enum wrap_box_type
-{
- WRAP_BOX_NOTHING,
- WRAP_BOX_SENTINEL,
- WRAP_BOX_PANGO,
- WRAP_BOX_IMAGE,
- WRAP_BOX_CALLBACK
-};
-
-
-/* Possible types of space following a wrap box */
-enum wrap_box_space
-{
- WRAP_SPACE_INTERWORD, /* Normal inter-word space */
- WRAP_SPACE_NONE, /* Box ends with an explicit hyphen or an SC
- * block boundary */
- WRAP_SPACE_EOP /* End of paragraph */
- /* TODO: Space between sentences etc */
-};
-
-
-struct text_seg
-{
- PangoGlyphString *glyphs;
- PangoAnalysis analysis;
-
- /* Offset of this text segment into the wrap box */
- int offs_char;
- int len_chars;
-
- /* Pango units */
- int width;
- int height;
- int ascent;
-};
-
-
-/* A wrap box is a run of content - could be text, an image or so one - that is
- * one logical unit as far as Colloquium is concerned. It might consist of
- * multiple units, for example, in Pango's mind. */
-struct wrap_box
-{
- enum wrap_box_type type;
- int editable;
-
- SCBlock *scblock;
- int offs_char; /* offset (in characters, not bytes) into scblock */
-
- /* Pango units */
- int width;
- int height;
- int ascent;
-
- enum wrap_box_space space; /* Type of "space" following box */
- double sp; /* Calculated space (Pango units) after box */
-
- /* For type == WRAP_BOX_PANGO */
- PangoFont *font;
- PangoFontDescription *fontdesc;
- double col[4]; /* rgba colour */
- int len_chars;
- int n_segs;
- struct text_seg *segs;
-
- /* For type == WRAP_BOX_IMAGE */
- char *filename;
-
- /* For type == WRAP_BOX_CALLBACK */
- SCCallbackDrawFunc draw_func;
- SCCallbackClickFunc click_func;
- void *bvp;
- void *vp;
-};
-
-
-/* An actual wrap line, with geometry etc */
-struct wrap_line
-{
- struct boxvec *boxes;
-
- int width; /* Pango units */
- int height; /* Pango units */
- int ascent; /* Pango units */
-
- int overfull;
- int underfull;
- int last_line;
-};
-
-extern int wrap_contents(struct frame *fr);
-
-extern void get_cursor_pos(struct wrap_box *box, int pos,
- double *xposd, double *yposd, double *line_height);
-
-extern void find_cursor(struct frame *fr, double xposd, double yposd,
- int *line, int *box, int *pos);
-
-extern int alloc_boxes(struct wrap_line *l);
-extern void initialise_line(struct wrap_line *l);
-
-extern void wrap_line_free(struct wrap_line *l);
-extern void show_boxes(struct boxvec *boxes);
-extern double total_height(struct frame *fr);
-
-extern int insert_box(struct wrap_line *l, int pos);
-extern int which_segment(struct wrap_box *box, int pos, int *err);
-
-#endif /* WRAP_H */