Forms: add document dirty flag

6 files changed, 26 insertions, 0 deletions

diff --git a/fitz/doc_interactive.c b/fitz/doc_interactive.c
index d7bc954d..61f2f4f1 100644
--- a/fitz/doc_interactive.c
+++ b/fitz/doc_interactive.c
@@ -6,6 +6,11 @@
 	to indirect through function pointers.
 */
 
+int fz_has_unsaved_changes(fz_interactive *idoc)
+{
+	return pdf_has_unsaved_changes((pdf_document*)idoc);
+}
+
 int fz_pass_event(fz_interactive *idoc, fz_page *page, fz_ui_event *ui_event)
 {
 	return pdf_pass_event((pdf_document*)idoc, (pdf_page*)page, ui_event);
diff --git a/fitz/fitz.h b/fitz/fitz.h
index 595dc2e4..6a9f7e0a 100644
--- a/fitz/fitz.h
+++ b/fitz/fitz.h
@@ -2410,6 +2410,12 @@ typedef struct fz_widget_s fz_widget;
 fz_interactive *fz_interact(fz_document *doc);
 
 /*
+	Determine whether changes have been made since the
+	document was opened or last saved.
+*/
+int fz_has_unsaved_changes(fz_interactive *idoc);
+
+/*
 	fz_pass_event: Pass a UI event to an interactive
 	document.
 
diff --git a/pdf/mupdf-internal.h b/pdf/mupdf-internal.h
index 62747538..8422fce3 100644
--- a/pdf/mupdf-internal.h
+++ b/pdf/mupdf-internal.h
@@ -226,6 +226,7 @@ struct pdf_document_s
 
 	pdf_js *js;
 	int recalculating;
+	int dirty;
 };
 
 pdf_document *pdf_open_document_no_run(fz_context *ctx, const char *filename);
@@ -604,6 +605,7 @@ void pdf_remove_item(fz_context *ctx, fz_store_free_fn *free, pdf_obj *key);
 /*
  * PDF interaction interface
  */
+int pdf_has_unsaved_changes(pdf_document *doc);
 int pdf_pass_event(pdf_document *doc, pdf_page *page, fz_ui_event *ui_event);
 fz_rect *pdf_get_screen_update(pdf_document *doc);
 fz_widget *pdf_get_focussed_widget(pdf_document *doc);
diff --git a/pdf/pdf_form.c b/pdf/pdf_form.c
index d74316fa..d1ca8474 100644
--- a/pdf/pdf_form.c
+++ b/pdf/pdf_form.c
@@ -1387,6 +1387,8 @@ static void reset_field(pdf_document *doc, pdf_obj *obj)
 {
 	fz_context *ctx = doc->ctx;
 
+	doc->dirty = 1;
+
 	switch (pdf_field_getType(doc, obj))
 	{
 	case FZ_WIDGET_TYPE_RADIOBUTTON:
@@ -1670,6 +1672,11 @@ static void toggle_check_box(pdf_document *doc, pdf_obj *obj)
 	/* FIXME: should probably update the V entry in the field dictionary too */
 }
 
+int pdf_has_unsaved_changes(pdf_document *doc)
+{
+	return doc->dirty;
+}
+
 int pdf_pass_event(pdf_document *doc, pdf_page *page, fz_ui_event *ui_event)
 {
 	pdf_annot *annot;
@@ -1826,6 +1833,8 @@ static void recalculate(pdf_document *doc)
 
 void pdf_field_setValue(pdf_document *doc, pdf_obj *field, char *text)
 {
+	doc->dirty = 1;
+
 	update_text_field_value(doc->ctx, field, text);
 	recalculate(doc);
 	pdf_field_mark_dirty(doc->ctx, field);
diff --git a/pdf/pdf_repair.c b/pdf/pdf_repair.c
index 0874c2f8..bfbc581e 100644
--- a/pdf/pdf_repair.c
+++ b/pdf/pdf_repair.c
@@ -228,6 +228,8 @@ pdf_repair_xref(pdf_document *xref, pdf_lexbuf *buf)
 	fz_var(info);
 	fz_var(list);
 
+	xref->dirty = 1;
+
 	fz_seek(xref->file, 0, 0);
 
 	fz_try(ctx)
diff --git a/pdf/pdf_write.c b/pdf/pdf_write.c
index 76f19748..9c5c5a53 100644
--- a/pdf/pdf_write.c
+++ b/pdf/pdf_write.c
@@ -2177,6 +2177,8 @@ void pdf_write_document(pdf_document *xref, char *filename, fz_write_options *fz
 		}
 
 		writexref(xref, &opts, 0, xref->len, !opts.do_linear, 0, opts.first_xref_offset);
+
+		xref->dirty = 0;
 	}
 	fz_always(ctx)
 	{