From 87b644ecd8f207e71b83be4f5cc52dbf4a34d9be Mon Sep 17 00:00:00 2001
From: Olaf Wintermann <olaf.wintermann@gmail.com>
Date: Thu, 20 Mar 2025 21:38:39 +0100
Subject: [PATCH] implement serialization of md image tags

---
 application/gtk-text.c | 47 +++++++++++++++++++++++++++++++++++++++---
 application/gtk-text.h |  7 ++++++-
 2 files changed, 50 insertions(+), 4 deletions(-)

diff --git a/application/gtk-text.c b/application/gtk-text.c
index f95ab26..fba2344 100644
--- a/application/gtk-text.c
+++ b/application/gtk-text.c
@@ -36,6 +36,8 @@
 #include <cx/string.h>
 #include <cx/printf.h>
 
+#include <libidav/utils.h>
+
 #include <ctype.h>
 #include <string.h>
 
@@ -261,7 +263,11 @@ static gboolean editor_attach_file(NoteEditor *editor, const char *path) {
     return FALSE; // TODO
 }
 
-static void editor_attach_image(NoteEditor *editor, GdkPixbuf *pixbuf) {
+void md_serialize_image(EmbeddedWidget *em, CxBuffer *out) {
+    cx_bprintf(out, "![image](%s)", em->name);
+}
+
+static void editor_attach_image(NoteEditor *editor, GdkPixbuf *pixbuf, char *attachment_path) {
     GtkTextView *textview = GTK_TEXT_VIEW(editor->textview);
     GtkTextBuffer *buffer = gtk_text_view_get_buffer(textview);
     
@@ -284,10 +290,16 @@ static void editor_attach_image(NoteEditor *editor, GdkPixbuf *pixbuf) {
     EmbeddedWidget *em = malloc(sizeof(EmbeddedWidget));
     em->widget = image;
     em->anchor = anchor;
-    em->restore = NULL;
+    em->name = attachment_path ? strdup(util_resource_name(attachment_path)) : NULL;
+    em->path = attachment_path;
+    em->data1 = pixbuf;
+    em->data2 = NULL;
+    em->serialize = md_serialize_image;
     g_object_ref(image);
     g_object_ref(anchor);
     
+    g_object_set_data(G_OBJECT(anchor), "em", em);
+    
     BufferEmbeddedObjects *embedded_objects = g_object_get_data(G_OBJECT(buffer), "embedded");
     cxListAdd(embedded_objects->objects, em);
 }
@@ -337,6 +349,8 @@ static gboolean editor_drop_cb(
         double y,
         NoteEditor *editor)
 {
+    char *attachment_path = NULL;
+    
     gboolean success = TRUE;
     GdkPixbuf *pixbuf = NULL;
     if(G_VALUE_HOLDS(value, G_TYPE_FILE)) {
@@ -353,6 +367,7 @@ static gboolean editor_drop_cb(
         g_free(scheme);
         
         char *path = g_file_get_path(file);
+        attachment_path = strdup(path);
         printf("dnd file: %s\n", path);
         
         if(path_is_image_file(cx_str(path))) {
@@ -375,7 +390,9 @@ static gboolean editor_drop_cb(
     }
     
     if(pixbuf && success) {
-        editor_attach_image(editor, pixbuf);
+        editor_attach_image(editor, pixbuf, attachment_path);
+    } else {
+        free(attachment_path);
     }
     
     return success;
@@ -700,11 +717,35 @@ cxmutstr editor_get_markdown(UiText *text, const CxAllocator *a) {
     
     CxMap *prev_tags = cxHashMapCreateSimple(CX_STORE_POINTERS);
     
+    GtkTextChildAnchor *anchor = NULL;
+    
     GtkTextIter start;
     GtkTextIter iter;
     gtk_text_buffer_get_iter_at_offset(buffer, &iter, 0);
     start = iter;
     while(gtk_text_iter_forward_to_tag_toggle(&iter, NULL)) {
+        if(anchor) {
+            EmbeddedWidget *em = g_object_get_data(G_OBJECT(anchor), "em");
+            if(em) {
+                em->serialize(em, &out);
+            }
+            anchor = NULL;
+        }
+        
+        // check for anchors
+        GtkTextIter a = start;
+        while(!gtk_text_iter_equal(&a, &iter)) {
+            anchor = gtk_text_iter_get_child_anchor(&a);
+            gtk_text_iter_forward_char(&a);
+            if(anchor) {
+                iter = a;
+                break;
+            }
+        }
+        if(!anchor) {
+            anchor = gtk_text_iter_get_child_anchor(&iter);
+        }
+        
         gchar *text = gtk_text_buffer_get_text(buffer, &start, &iter, TRUE);
         
         GSList *tags = gtk_text_iter_get_tags(&start);
diff --git a/application/gtk-text.h b/application/gtk-text.h
index 97f30dd..c9f9bc2 100644
--- a/application/gtk-text.h
+++ b/application/gtk-text.h
@@ -30,6 +30,7 @@
 #define GTK_TEXT_H
 
 #include "editor.h"
+#include <cx/buffer.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -56,9 +57,13 @@ typedef struct BufferEmbeddedObjects {
 
 typedef struct EmbeddedWidget EmbeddedWidget;
 struct EmbeddedWidget {
-    void (*restore)(NoteEditor *, EmbeddedWidget *);
     GtkWidget *widget;
     GtkTextChildAnchor *anchor;
+    char *name;
+    char *path;
+    void *data1;
+    void *data2;
+    void (*serialize)(EmbeddedWidget *e, CxBuffer *out);
 };
 
 typedef void (*set_style_cb)(MDActiveStyles *style, GtkTextTag *tag);
-- 
2.43.5