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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/>.
+ */
+#pragma once
+
+#include <string.h>
+
+#include <glib.h>
+
+#include <Scintilla.h>
+
+#include "sciteco.h"
+#include "view.h"
+#include "undo.h"
+
+/**
+ * Scintilla document type.
+ * The struct is never defined and only exists for improved
+ * type safety.
+ */
+typedef struct teco_doc_scintilla_t teco_doc_scintilla_t;
+
+/**
+ * A Scintilla document.
+ *
+ * Also contains other attributes required to restore
+ * the overall editor state when loading it into a Scintilla view.
+ */
+typedef struct {
+ /**
+ * Underlying Scintilla document.
+ * It is created on demand in teco_doc_maybe_create_document(),
+ * so that we don't waste memory on integer-only Q-Registers.
+ */
+ teco_doc_scintilla_t *doc;
+
+ /*
+ * The so called "parameters".
+ * Updated/restored only when required
+ */
+ gint anchor, dot;
+ gint first_line, xoffset;
+} teco_doc_t;
+
+/** @memberof teco_doc_t */
+static inline void
+teco_doc_init(teco_doc_t *ctx)
+{
+ memset(ctx, 0, sizeof(*ctx));
+}
+
+void teco_doc_edit(teco_doc_t *ctx);
+void teco_doc_undo_edit(teco_doc_t *ctx);
+
+void teco_doc_set_string(teco_doc_t *ctx, const gchar *str, gsize len);
+void teco_doc_undo_set_string(teco_doc_t *ctx);
+
+void teco_doc_get_string(teco_doc_t *ctx, gchar **str, gsize *len);
+
+void teco_doc_update_from_view(teco_doc_t *ctx, teco_view_t *from);
+void teco_doc_update_from_doc(teco_doc_t *ctx, const teco_doc_t *from);
+
+/** @memberof teco_doc_t */
+#define teco_doc_update(CTX, FROM) \
+ (_Generic((FROM), teco_view_t * : teco_doc_update_from_view, \
+ teco_doc_t * : teco_doc_update_from_doc, \
+ const teco_doc_t * : teco_doc_update_from_doc)((CTX), (FROM)))
+
+/** @memberof teco_doc_t */
+static inline void
+teco_doc_reset(teco_doc_t *ctx)
+{
+ ctx->anchor = ctx->dot = 0;
+ ctx->first_line = ctx->xoffset = 0;
+}
+
+/** @memberof teco_doc_t */
+static inline void
+teco_doc_undo_reset(teco_doc_t *ctx)
+{
+ /*
+ * NOTE: Could be rolled into one function
+ * and called with teco_undo_call() if we really
+ * wanted to save more memory.
+ */
+ teco_undo_gint(ctx->anchor);
+ teco_undo_gint(ctx->dot);
+ teco_undo_gint(ctx->first_line);
+ teco_undo_gint(ctx->xoffset);
+}
+
+void teco_doc_exchange(teco_doc_t *ctx, teco_doc_t *other);
+
+/** @memberof teco_doc_t */
+static inline void
+teco_doc_undo_exchange(teco_doc_t *ctx)
+{
+ teco_undo_ptr(ctx->doc);
+ teco_doc_undo_reset(ctx);
+}
+
+void teco_doc_clear(teco_doc_t *ctx);