From 82715e294cd05a1eb4baee5b5bc08ad61ca2ca6d Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 10 Sep 2022 03:50:35 +0200
Subject: Fix clipboard images for gnome screenshot

---
 src/window/window.c | 75 +++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 52 insertions(+), 23 deletions(-)

diff --git a/src/window/window.c b/src/window/window.c
index 285b255..b60c9e4 100644
--- a/src/window/window.c
+++ b/src/window/window.c
@@ -952,19 +952,20 @@ bool mgl_window_get_clipboard(mgl_window *self, mgl_clipboard_callback callback,
             if(!xev.xselection.property || !xev.xselection.target || xev.xselection.selection != x11_context->clipboard_atom)
                 continue;
 
-            Atom type;
+            Atom type = None;
             int format;
             unsigned long items;
             unsigned long remaining_bytes = 32768;
             unsigned char *data = NULL;
 
             if(xev.xselection.target == XA_TARGETS && requested_clipboard_type == None) {
-                if(XGetWindowProperty(context->connection, self->window, x11_context->clipboard_atom, 0, 1024, False, AnyPropertyType, &type, &format, &items, &remaining_bytes, &data) == Success && data) {
+                if(XGetWindowProperty(context->connection, xev.xselection.requestor, xev.xselection.property, 0, 1024, False, AnyPropertyType, &type, &format, &items, &remaining_bytes, &data) == Success && data) {
                     bool got_clipboard = false;
                     if(type != x11_context->incr_atom && type == XA_ATOM && format == 32) {
                         requested_clipboard_type = find_matching_atom(supported_clipboard_types, num_supported_clipboard_types, (Atom*)data, items);
                         if(requested_clipboard_type == None) {
                             /* Pasting clipboard data type we dont support */
+                            XFree(data);
                             return false;
                         } else {
                             XConvertSelection(context->connection, x11_context->clipboard_atom, requested_clipboard_type, x11_context->clipboard_atom, self->window, CurrentTime);
@@ -973,34 +974,62 @@ bool mgl_window_get_clipboard(mgl_window *self, mgl_clipboard_callback callback,
                     XFree(data);
                 }
             } else if(xev.xselection.target == requested_clipboard_type) {
-                bool success = true;
-                unsigned long offset = 0;
-
-                /* offset is specified in XGetWindowProperty as a multiple of 32-bit (4 bytes) */
-                while(XGetWindowProperty(context->connection, self->window, x11_context->clipboard_atom, offset/4, 32768, False, AnyPropertyType, &type, &format, &items, &remaining_bytes, &data) == Success && data) {
-                    const mgl_clipboard_type clipboard_type = atom_type_to_supported_clipboard_type(x11_context, type, format);
-                    if(type != x11_context->incr_atom && clipboard_type != -1) {
-                        if(!callback(data, items, clipboard_type, userdata)) {
-                            success = false;
+                unsigned int total_size = 0;
+                unsigned int total_offset = 0;
+                while(mgl_clock_get_elapsed_time_seconds(&timeout_timer) < timeout_seconds) {
+                    bool success = false;
+                    unsigned long offset = 0;
+
+                    /* offset is specified in XGetWindowProperty as a multiple of 32-bit (4 bytes) */
+                    while(XGetWindowProperty(context->connection, xev.xselection.requestor, xev.xselection.property, offset/4, 32768, True, AnyPropertyType, &type, &format, &items, &remaining_bytes, &data) == Success) {
+                        if(mgl_clock_get_elapsed_time_seconds(&timeout_timer) >= timeout_seconds)
                             break;
+
+                        if(type == x11_context->incr_atom) {
+                            XDeleteProperty(context->connection, self->window, x11_context->incr_atom);
+                            /* TODO: */
+                            /*receive_property_notify_event(self);*/
+                            total_size = *(unsigned long*)data;
+                            offset = 0;
+                            type = None;
+                            XFree(data);
+                            data = NULL;
+                            continue;
                         }
-                    }
-                    offset += (items * (format/8)); // format is the bit size of the data
-                    XFree(data);
 
-                    if(remaining_bytes == 0)
-                        break;
+                        const size_t num_items_bytes = items * (format/8);
+                        const mgl_clipboard_type clipboard_type = atom_type_to_supported_clipboard_type(x11_context, type, format);
+                        if(data && num_items_bytes > 0 && clipboard_type != -1) {
+                            if(!callback(data, num_items_bytes, clipboard_type, userdata)) {
+                                XFree(data);
+                                break;
+                            }
+                        }
+                        offset += num_items_bytes; // format is the bit size of the data
+                        total_offset += num_items_bytes;
 
-                    if(mgl_clock_get_elapsed_time_seconds(&timeout_timer) >= timeout_seconds) {
-                        success = false;
-                        break;
+                        if(data) {
+                            XFree(data);
+                            data = NULL;
+                        }
+
+                        if((total_size == 0 && remaining_bytes == 0) || (total_size > 0 && total_offset >= total_size)) {
+                            success = true;
+                            break;
+                        }
+
+                        if(remaining_bytes == 0)
+                            break;
                     }
-                }
 
-                if(remaining_bytes != 0)
-                    success = false;
+                    if((total_size == 0 && remaining_bytes != 0) || (total_size > 0 && total_offset < total_size)) {
+                        offset = 0;
+                        XDeleteProperty(context->connection, self->window, x11_context->incr_atom);
+                        continue;
+                    }
 
-                return success;
+                    return success;
+                }
             }
         }
     }
-- 
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