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/*
* Copyright (C) 2012-2021 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 <glib.h>
#include <Scintilla.h>
#include "sciteco.h"
#include "view.h"
#include "undo.h"
#include "qreg.h"
#include "doc.h"
static inline teco_doc_scintilla_t *
teco_doc_get_scintilla(teco_doc_t *ctx)
{
if (G_UNLIKELY(!ctx->doc))
ctx->doc = (teco_doc_scintilla_t *)teco_view_ssm(teco_qreg_view, SCI_CREATEDOCUMENT, 0, 0);
return ctx->doc;
}
/** @memberof teco_doc_t */
void
teco_doc_edit(teco_doc_t *ctx)
{
/*
* FIXME: SCI_SETREPRESENTATION does not redraw
* the screen - also that would be very slow.
* Since SCI_SETDOCPOINTER resets the representation
* (this should probably be fixed in Scintilla),
* the screen is garbled since the layout cache
* is calculated with the default representations.
* We work around this by temporarily disabling the
* layout cache.
*/
gint old_mode = teco_view_ssm(teco_qreg_view, SCI_GETLAYOUTCACHE, 0, 0);
teco_view_ssm(teco_qreg_view, SCI_SETLAYOUTCACHE, SC_CACHE_NONE, 0);
teco_view_ssm(teco_qreg_view, SCI_SETDOCPOINTER, 0,
(sptr_t)teco_doc_get_scintilla(ctx));
teco_view_ssm(teco_qreg_view, SCI_SETFIRSTVISIBLELINE, ctx->first_line, 0);
teco_view_ssm(teco_qreg_view, SCI_SETXOFFSET, ctx->xoffset, 0);
teco_view_ssm(teco_qreg_view, SCI_SETSEL, ctx->anchor, (sptr_t)ctx->dot);
/*
* Default TECO-style character representations.
* They are reset on EVERY SETDOCPOINTER call by Scintilla.
*/
teco_view_set_representations(teco_qreg_view);
teco_view_ssm(teco_qreg_view, SCI_SETLAYOUTCACHE, old_mode, 0);
}
/** @memberof teco_doc_t */
void
teco_doc_undo_edit(teco_doc_t *ctx)
{
/*
* FIXME: see above in teco_doc_edit()
*/
undo__teco_view_ssm(teco_qreg_view, SCI_SETLAYOUTCACHE,
teco_view_ssm(teco_qreg_view, SCI_GETLAYOUTCACHE, 0, 0), 0);
undo__teco_view_set_representations(teco_qreg_view);
undo__teco_view_ssm(teco_qreg_view, SCI_SETSEL, ctx->anchor, (sptr_t)ctx->dot);
undo__teco_view_ssm(teco_qreg_view, SCI_SETXOFFSET, ctx->xoffset, 0);
undo__teco_view_ssm(teco_qreg_view, SCI_SETFIRSTVISIBLELINE, ctx->first_line, 0);
undo__teco_view_ssm(teco_qreg_view, SCI_SETDOCPOINTER, 0,
(sptr_t)teco_doc_get_scintilla(ctx));
undo__teco_view_ssm(teco_qreg_view, SCI_SETLAYOUTCACHE, SC_CACHE_NONE, 0);
}
/** @memberof teco_doc_t */
void
teco_doc_set_string(teco_doc_t *ctx, const gchar *str, gsize len)
{
if (teco_qreg_current)
teco_doc_update(&teco_qreg_current->string, teco_qreg_view);
teco_doc_reset(ctx);
teco_doc_edit(ctx);
teco_view_ssm(teco_qreg_view, SCI_BEGINUNDOACTION, 0, 0);
teco_view_ssm(teco_qreg_view, SCI_CLEARALL, 0, 0);
teco_view_ssm(teco_qreg_view, SCI_APPENDTEXT, len, (sptr_t)(str ? : ""));
teco_view_ssm(teco_qreg_view, SCI_ENDUNDOACTION, 0, 0);
if (teco_qreg_current)
teco_doc_edit(&teco_qreg_current->string);
}
/** @memberof teco_doc_t */
void
teco_doc_undo_set_string(teco_doc_t *ctx)
{
/*
* Necessary, so that upon rubout the
* string's parameters are restored.
*/
teco_doc_update(ctx, teco_qreg_view);
if (teco_qreg_current && teco_qreg_current->must_undo) // FIXME
teco_doc_undo_edit(&teco_qreg_current->string);
teco_doc_undo_reset(ctx);
undo__teco_view_ssm(teco_qreg_view, SCI_UNDO, 0, 0);
teco_doc_undo_edit(ctx);
}
/**
* Get a document as a string.
*
* @param ctx The document.
* @param str Pointer to a variable to hold the return string.
* It can be NULL if you are interested only in the string's length.
* Strings must be freed via g_free().
* @param len Where to store the string's length (mandatory).
*
* @see teco_qreg_vtable_t::get_string()
* @memberof teco_doc_t
*/
void
teco_doc_get_string(teco_doc_t *ctx, gchar **str, gsize *len)
{
if (!ctx->doc) {
if (str)
*str = NULL;
*len = 0;
return;
}
if (teco_qreg_current)
teco_doc_update(&teco_qreg_current->string, teco_qreg_view);
teco_doc_edit(ctx);
*len = teco_view_ssm(teco_qreg_view, SCI_GETLENGTH, 0, 0);
if (str) {
*str = g_malloc(*len + 1);
teco_view_ssm(teco_qreg_view, SCI_GETTEXT, *len + 1, (sptr_t)*str);
}
if (teco_qreg_current)
teco_doc_edit(&teco_qreg_current->string);
}
/** @memberof teco_doc_t */
void
teco_doc_update_from_view(teco_doc_t *ctx, teco_view_t *from)
{
ctx->anchor = teco_view_ssm(from, SCI_GETANCHOR, 0, 0);
ctx->dot = teco_view_ssm(from, SCI_GETCURRENTPOS, 0, 0);
ctx->first_line = teco_view_ssm(from, SCI_GETFIRSTVISIBLELINE, 0, 0);
ctx->xoffset = teco_view_ssm(from, SCI_GETXOFFSET, 0, 0);
}
/** @memberof teco_doc_t */
void
teco_doc_update_from_doc(teco_doc_t *ctx, const teco_doc_t *from)
{
ctx->anchor = from->anchor;
ctx->dot = from->dot;
ctx->first_line = from->first_line;
ctx->xoffset = from->xoffset;
}
/**
* Only for teco_qreg_stack_pop() which does some clever
* exchanging of document data (without any deep copying)
*
* @memberof teco_doc_t
*/
void
teco_doc_exchange(teco_doc_t *ctx, teco_doc_t *other)
{
teco_doc_t temp;
memcpy(&temp, ctx, sizeof(temp));
memcpy(ctx, other, sizeof(*ctx));
memcpy(other, &temp, sizeof(*other));
}
/** @memberof teco_doc_t */
void
teco_doc_clear(teco_doc_t *ctx)
{
if (ctx->doc)
teco_view_ssm(teco_qreg_view, SCI_RELEASEDOCUMENT, 0, (sptr_t)ctx->doc);
}
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