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/*
* frame.h
*
* Copyright © 2013-2017 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 FRAME_H
#define FRAME_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pango/pango.h>
#include <cairo.h>
#include "sc_parse.h"
#include "sc_interp.h"
#include "imagestore.h"
typedef enum
{
UNITS_SLIDE,
UNITS_FRAC
} LengthUnits;
typedef enum
{
GRAD_NONE,
GRAD_HORIZ,
GRAD_VERT
} GradientType;
enum para_type
{
PARA_TYPE_TEXT,
PARA_TYPE_IMAGE,
PARA_TYPE_CALLBACK
};
typedef struct _paragraph Paragraph;
struct edit_pos
{
int para; /* Paragraph number */
size_t pos; /* Byte position within paragraph */
int trail;
};
struct frame
{
struct frame **children;
int num_children;
int max_children;
SCBlock *scblocks;
Paragraph **paras;
int n_paras;
int max_paras;
/* The font which will be used by default for this frame */
PangoFontDescription *fontdesc;
double col[4];
/* The rectangle allocated to this frame, determined by the renderer */
double x;
double y;
double w;
double h;
double pad_t;
double pad_b;
double pad_l;
double pad_r;
/* Background properties for this frame */
double bgcol[4];
double bgcol2[4];
GradientType grad;
/* True if this frame should be deleted on the next mouse click */
int empty;
/* True if the aspect ratio of this frame should be maintained */
int is_image;
/* True if this frame can be resized and moved */
int resizable;
};
extern struct frame *frame_new(void);
extern void frame_free(struct frame *fr);
extern struct frame *add_subframe(struct frame *fr);
extern void show_hierarchy(struct frame *fr, const char *t);
extern void delete_subframe(struct frame *top, struct frame *fr);
extern struct frame *find_frame_with_scblocks(struct frame *top,
SCBlock *scblocks);
extern double total_height(struct frame *fr);
extern Paragraph *last_open_para(struct frame *fr);
extern Paragraph *current_para(struct frame *fr);
extern void close_last_paragraph(struct frame *fr);
extern int last_para_available_for_text(struct frame *fr);
extern void show_para(Paragraph *p);
extern void set_para_spacing(Paragraph *para, float space[4]);
extern double paragraph_height(Paragraph *para);
extern void render_paragraph(cairo_t *cr, Paragraph *para, ImageStore *is,
enum is_size isz);
extern SCBlock *get_newline_at_end(Paragraph *para);
extern void set_newline_at_end(Paragraph *para, SCBlock *bl);
extern void check_run(struct frame *fr, int pn);
extern void show_edit_pos(struct edit_pos a);
extern void add_run(Paragraph *para, SCBlock *scblock, SCBlock *macro_real,
size_t offs_bytes, size_t len_bytes,
PangoFontDescription *fdesc, double col[4]);
extern void add_callback_para(struct frame *fr, SCBlock *scblock, SCBlock *mr,
double w, double h,
SCCallbackDrawFunc draw_func,
SCCallbackClickFunc click_func, void *bvp,
void *vp);
extern void add_image_para(struct frame *fr, SCBlock *scblock,
const char *filename,
double w, double h, int editable);
extern void wrap_paragraph(Paragraph *para, PangoContext *pc, double w,
size_t sel_start, size_t sel_end);
extern size_t end_offset_of_para(struct frame *fr, int pn);
extern int find_cursor(struct frame *fr, double x, double y,
int *ppara, size_t *ppos, int *ptrail);
extern int find_cursor_2(struct frame *fr, double x, double y,
struct edit_pos *pos);
extern void sort_positions(struct edit_pos *a, struct edit_pos *b);
extern int positions_equal(struct edit_pos a, struct edit_pos b);
extern int get_para_highlight(struct frame *fr, int cursor_para,
double *cx, double *cy, double *cw, double *ch);
extern int get_cursor_pos(struct frame *fr, int cursor_para, int cursor_pos,
double *cx, double *cy, double *ch);
extern void cursor_moveh(struct frame *fr, int *cpara, size_t *cpos, int *ctrail,
signed int dir);
extern void cursor_movev(struct frame *fr, int *cpara, size_t *cpos, int *ctrail,
signed int dir);
extern void check_callback_click(struct frame *fr, int para);
extern size_t pos_trail_to_offset(Paragraph *para, size_t offs, int trail);
extern void insert_text_in_paragraph(Paragraph *para, size_t offs,
const char *t);
extern void delete_text_from_frame(struct frame *fr, struct edit_pos p1, struct edit_pos p2,
double wrap_w);
extern size_t delete_text_in_paragraph(struct frame *fr, int npara, size_t offs0, ssize_t offs2);
extern SCBlock *split_paragraph(struct frame *fr, int pn, size_t pos,
PangoContext *pc);
extern SCBlock *block_at_cursor(struct frame *fr, int para, size_t pos);
extern int get_sc_pos(struct frame *fr, int pn, size_t pos,
SCBlock **bl, size_t *ppos);
extern void *get_para_bvp(Paragraph *para);
extern void merge_paragraphs(struct frame *fr, int para);
extern enum para_type para_type(Paragraph *para);
extern SCBlock *para_scblock(Paragraph *para);
extern int para_debug_num_runs(Paragraph *para);
extern int para_debug_run_info(Paragraph *para, int i, size_t *len, SCBlock **scblock,
size_t *scblock_offs, size_t *para_offs);
#endif /* FRAME_H */
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