From 9a2bbd8acbebcde56dd2f89ebca3b196c2b38914 Mon Sep 17 00:00:00 2001
From: Ethan Lee <[EMAIL REDACTED]>
Date: Wed, 12 Jan 2022 13:01:05 -0500
Subject: [PATCH] wayland: Convert URI to local path for DropFile
---
src/video/wayland/SDL_waylandevents.c | 149 ++++++++++++++++++++++----
1 file changed, 129 insertions(+), 20 deletions(-)
diff --git a/src/video/wayland/SDL_waylandevents.c b/src/video/wayland/SDL_waylandevents.c
index dfa62ec6905..bf2aeea5b54 100644
--- a/src/video/wayland/SDL_waylandevents.c
+++ b/src/video/wayland/SDL_waylandevents.c
@@ -1312,36 +1312,145 @@ data_device_handle_motion(void *data, struct wl_data_device *wl_data_device,
{
}
+/* Decodes URI escape sequences in string buf of len bytes
+ (excluding the terminating NULL byte) in-place. Since
+ URI-encoded characters take three times the space of
+ normal characters, this should not be an issue.
+
+ Returns the number of decoded bytes that wound up in
+ the buffer, excluding the terminating NULL byte.
+
+ The buffer is guaranteed to be NULL-terminated but
+ may contain embedded NULL bytes.
+
+ On error, -1 is returned.
+
+ FIXME: This was shamelessly copied from SDL_x11events.c
+ */
+static int Wayland_URIDecode(char *buf, int len) {
+ int ri, wi, di;
+ char decode = '\0';
+ if (buf == NULL || len < 0) {
+ errno = EINVAL;
+ return -1;
+ }
+ if (len == 0) {
+ len = SDL_strlen(buf);
+ }
+ for (ri = 0, wi = 0, di = 0; ri < len && wi < len; ri += 1) {
+ if (di == 0) {
+ /* start decoding */
+ if (buf[ri] == '%') {
+ decode = '\0';
+ di += 1;
+ continue;
+ }
+ /* normal write */
+ buf[wi] = buf[ri];
+ wi += 1;
+ continue;
+ } else if (di == 1 || di == 2) {
+ char off = '\0';
+ char isa = buf[ri] >= 'a' && buf[ri] <= 'f';
+ char isA = buf[ri] >= 'A' && buf[ri] <= 'F';
+ char isn = buf[ri] >= '0' && buf[ri] <= '9';
+ if (!(isa || isA || isn)) {
+ /* not a hexadecimal */
+ int sri;
+ for (sri = ri - di; sri <= ri; sri += 1) {
+ buf[wi] = buf[sri];
+ wi += 1;
+ }
+ di = 0;
+ continue;
+ }
+ /* itsy bitsy magicsy */
+ if (isn) {
+ off = 0 - '0';
+ } else if (isa) {
+ off = 10 - 'a';
+ } else if (isA) {
+ off = 10 - 'A';
+ }
+ decode |= (buf[ri] + off) << (2 - di) * 4;
+ if (di == 2) {
+ buf[wi] = decode;
+ wi += 1;
+ di = 0;
+ } else {
+ di += 1;
+ }
+ continue;
+ }
+ }
+ buf[wi] = '\0';
+ return wi;
+}
+
+/* Convert URI to local filename
+ return filename if possible, else NULL
+
+ FIXME: This was shamelessly copied from SDL_x11events.c
+*/
+static char* Wayland_URIToLocal(char* uri) {
+ char *file = NULL;
+ SDL_bool local;
+
+ if (SDL_memcmp(uri,"file:/",6) == 0) uri += 6; /* local file? */
+ else if (SDL_strstr(uri,":/") != NULL) return file; /* wrong scheme */
+
+ local = uri[0] != '/' || (uri[0] != '\0' && uri[1] == '/');
+
+ /* got a hostname? */
+ if (!local && uri[0] == '/' && uri[2] != '/') {
+ char* hostname_end = SDL_strchr(uri+1, '/');
+ if (hostname_end != NULL) {
+ char hostname[ 257 ];
+ if (gethostname(hostname, 255) == 0) {
+ hostname[ 256 ] = '\0';
+ if (SDL_memcmp(uri+1, hostname, hostname_end - (uri+1)) == 0) {
+ uri = hostname_end + 1;
+ local = SDL_TRUE;
+ }
+ }
+ }
+ }
+ if (local) {
+ file = uri;
+ /* Convert URI escape sequences to real characters */
+ Wayland_URIDecode(file, 0);
+ if (uri[1] == '/') {
+ file++;
+ } else {
+ file--;
+ }
+ }
+ return file;
+}
+
static void
data_device_handle_drop(void *data, struct wl_data_device *wl_data_device)
{
SDL_WaylandDataDevice *data_device = data;
- void *buffer = NULL;
- size_t length = 0;
-
- const char *current_uri = NULL;
- const char *last_char = NULL;
- char *current_char = NULL;
if (data_device->drag_offer != NULL) {
/* TODO: SDL Support more mime types */
- buffer = Wayland_data_offer_receive(data_device->drag_offer,
- &length, FILE_MIME, SDL_FALSE);
-
- /* uri-list */
- current_uri = (const char *)buffer;
- last_char = (const char *)buffer + length;
- for (current_char = buffer; current_char < last_char; ++current_char) {
- if (*current_char == '\n' || *current_char == 0) {
- if (*current_uri != 0 && *current_uri != '#') {
- *current_char = 0;
- SDL_SendDropFile(NULL, current_uri);
+ size_t length;
+ void *buffer = Wayland_data_offer_receive(data_device->drag_offer,
+ &length, FILE_MIME, SDL_FALSE);
+ if (buffer) {
+ char *saveptr = NULL;
+ char *token = SDL_strtokr((char *) buffer, "\r\n", &saveptr);
+ while (token != NULL) {
+ char *fn = Wayland_URIToLocal(token);
+ if (fn) {
+ SDL_SendDropFile(NULL, fn); /* FIXME: Window? */
}
- current_uri = (const char *)current_char + 1;
+ token = SDL_strtokr(NULL, "\r\n", &saveptr);
}
+ SDL_SendDropComplete(NULL); /* FIXME: Window? */
+ SDL_free(buffer);
}
-
- SDL_free(buffer);
}
}