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/*
* Copyright (C) 2012-2024 Robin Haberkorn
*
* This program 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/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <stdio.h>
#include <glib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <Scintilla.h>
#include "sciteco.h"
#include "string-utils.h"
#include "undo.h"
#include "view.h"
#include "interface.h"
//#define DEBUG
teco_view_t *teco_interface_current_view = NULL;
TECO_DEFINE_UNDO_CALL(teco_interface_show_view, teco_view_t *);
TECO_DEFINE_UNDO_CALL(teco_interface_ssm, unsigned int, uptr_t, sptr_t);
TECO_DEFINE_UNDO_CALL(teco_interface_info_update_qreg, const teco_qreg_t *);
TECO_DEFINE_UNDO_CALL(teco_interface_info_update_buffer, const teco_buffer_t *);
typedef struct {
teco_string_t str;
gchar name[];
} teco_undo_set_clipboard_t;
static void
teco_undo_set_clipboard_action(teco_undo_set_clipboard_t *ctx, gboolean run)
{
if (run)
teco_interface_set_clipboard(ctx->name, ctx->str.data, ctx->str.len, NULL);
teco_string_clear(&ctx->str);
}
/**
* Set the clipboard upon rubout.
*
* This passes ownership of the clipboard content string
* to the undo token object.
*/
void
teco_interface_undo_set_clipboard(const gchar *name, gchar *str, gsize len)
{
teco_undo_set_clipboard_t *ctx;
ctx = teco_undo_push_size((teco_undo_action_t)teco_undo_set_clipboard_action,
sizeof(*ctx) + strlen(name) + 1);
if (ctx) {
ctx->str.data = str;
ctx->str.len = len;
strcpy(ctx->name, name);
} else {
g_free(str);
}
}
/**
* Print a message to the appropriate stdio streams.
*
* This method has similar semantics to `vprintf`, i.e.
* it leaves `ap` undefined. Therefore to pass the format
* string and arguments to another `vprintf`-like function,
* you have to copy the arguments via `va_copy`.
*/
void
teco_interface_stdio_vmsg(teco_msg_t type, const gchar *fmt, va_list ap)
{
FILE *stream = stdout;
switch (type) {
case TECO_MSG_USER:
break;
case TECO_MSG_INFO:
fputs("Info: ", stream);
break;
case TECO_MSG_WARNING:
stream = stderr;
fputs("Warning: ", stream);
break;
case TECO_MSG_ERROR:
stream = stderr;
fputs("Error: ", stream);
break;
}
g_vfprintf(stream, fmt, ap);
fputc('\n', stream);
}
void
teco_interface_process_notify(SCNotification *notify)
{
#ifdef DEBUG
g_printf("SCINTILLA NOTIFY: code=%d\n", notify->nmhdr.code);
#endif
}
/**
* Convert a glyph index to a byte offset as used by Scintilla.
*
* This is optimized with the "line character index",
* which must always be enabled in UTF-8 documents.
*
* It is also used to validate glyph indexes.
*
* @param pos Position in glyphs/characters.
* @return Position in bytes or -1 if pos is out of bounds.
*/
gssize
teco_glyphs2bytes(teco_int_t pos)
{
if (pos < 0)
return -1; /* invalid position */
if (!pos)
return 0;
if (!(teco_interface_ssm(SCI_GETLINECHARACTERINDEX, 0, 0) &
SC_LINECHARACTERINDEX_UTF32))
/* assume single-byte encoding */
return pos <= teco_interface_ssm(SCI_GETLENGTH, 0, 0) ? pos : -1;
sptr_t line = teco_interface_ssm(SCI_LINEFROMINDEXPOSITION, pos,
SC_LINECHARACTERINDEX_UTF32);
sptr_t line_bytes = teco_interface_ssm(SCI_POSITIONFROMLINE, line, 0);
pos -= teco_interface_ssm(SCI_INDEXPOSITIONFROMLINE, line,
SC_LINECHARACTERINDEX_UTF32);
return teco_interface_ssm(SCI_POSITIONRELATIVE, line_bytes, pos) ? : -1;
}
/**
* Convert byte offset to glyph/character index without bounds checking.
*/
teco_int_t
teco_bytes2glyphs(gsize pos)
{
if (!pos)
return 0;
if (!(teco_interface_ssm(SCI_GETLINECHARACTERINDEX, 0, 0) &
SC_LINECHARACTERINDEX_UTF32))
/* assume single-byte encoding */
return pos;
sptr_t line = teco_interface_ssm(SCI_LINEFROMPOSITION, pos, 0);
sptr_t line_bytes = teco_interface_ssm(SCI_POSITIONFROMLINE, line, 0);
return teco_interface_ssm(SCI_INDEXPOSITIONFROMLINE, line,
SC_LINECHARACTERINDEX_UTF32) +
teco_interface_ssm(SCI_COUNTCHARACTERS, line_bytes, pos);
}
#define TECO_RELATIVE_LIMIT 1024
/**
* Convert a glyph index relative to a byte position to
* a byte position.
*
* Can be used to implement commands with relative character
* ranges.
* As an optimization, this always counts characters for deltas
* smaller than TECO_RELATIVE_LIMIT, so it will be fast
* even where the character-index based lookup is too slow
* (as on exceedingly long lines).
*
* @param pos Byte position to start.
* @param n Number of glyphs/characters to the left (negative) or
* right (positive) of pos.
* @return Position in bytes or -1 if the resulting position is out of bounds.
*/
gssize
teco_glyphs2bytes_relative(gsize pos, teco_int_t n)
{
if (!n)
return pos;
if (ABS(n) > TECO_RELATIVE_LIMIT)
return teco_glyphs2bytes(teco_bytes2glyphs(pos) + n);
sptr_t res = teco_interface_ssm(SCI_POSITIONRELATIVE, pos, n);
/* SCI_POSITIONRELATIVE may return 0 even if the offset is valid */
return res ? : n > 0 ? -1 : teco_bytes2glyphs(pos)+n >= 0 ? 0 : -1;
}
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