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+// -*- C++ -*-
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+ *
+ * Gaius Mulley (gaius@glam.ac.uk) wrote html-table.h
+ *
+ * html-table.h
+ *
+ * provides the methods necessary to handle indentation and tab
+ * positions using html tables.
+ */
+
+/*
+This file is part of groff.
+
+groff 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.
+
+groff 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/>. */
+
+#include "html.h"
+
+#if !defined(HTML_TABLE_H)
+#define HTML_TABLE_H
+
+typedef struct tab_position {
+ char alignment;
+ int position;
+ struct tab_position *next;
+} tab_position;
+
+
+class tabs {
+public:
+ tabs ();
+ ~tabs ();
+ void clear (void);
+ int compatible (const char *s);
+ void init (const char *s);
+ void check_init (const char *s);
+ int find_tab (int pos);
+ int get_tab_pos (int n);
+ char get_tab_align (int n);
+ void dump_tabs (void);
+
+private:
+ void delete_list (void);
+ tab_position *tab;
+};
+
+/*
+ * define a column
+ */
+
+typedef struct cols {
+ int left, right;
+ int no;
+ char alignment;
+ struct cols *next;
+} cols;
+
+class html_table {
+public:
+ html_table (simple_output *op, int linelen);
+ ~html_table (void);
+ int add_column (int coln, int hstart, int hend, char align);
+ cols *get_column (int coln);
+ int insert_column (int coln, int hstart, int hend, char align);
+ int modify_column (cols *c, int hstart, int hend, char align);
+ int find_tab_column (int pos);
+ int find_column (int pos);
+ int get_tab_pos (int n);
+ char get_tab_align (int n);
+ void set_linelength (int linelen);
+ int no_columns (void);
+ int no_gaps (void);
+ int is_gap (cols *c);
+ void dump_table (void);
+ void emit_table_header (int space);
+ void emit_col (int n);
+ void emit_new_row (void);
+ void emit_finish_table (void);
+ int get_right (cols *c);
+ void add_indent (int indent);
+ void finish_row (void);
+ int get_effective_linelength (void);
+ void set_space (int space);
+ void emit_colspan (void);
+ void emit_td (int percentage, const char *s = ">");
+
+ tabs *tab_stops; /* tab stop positions */
+ simple_output *out;
+private:
+ cols *columns; /* column entries */
+ int linelength;
+ cols *last_col; /* last column started */
+ int start_space; /* have we seen a '.sp' tag? */
+
+ void remove_cols (cols *c);
+};
+
+/*
+ * the indentation wrapper.
+ * Builds an indentation from a html-table.
+ * This table is only emitted if the paragraph is emitted.
+ */
+
+class html_indent {
+public:
+ html_indent (simple_output *op, int ind, int pageoffset, int linelength);
+ ~html_indent (void);
+ void begin (int space); // called if we need to use the indent
+ void get_reg (int *ind, int *pageoffset, int *linelength);
+
+ // the indent is shutdown when it is deleted
+
+private:
+ void end (void);
+ int is_used;
+ int pg; // values of the registers as passed via initialization
+ int ll;
+ int in;
+ html_table *table;
+};
+
+#endif