Enhance LXQt Desktop Enviromment support

The LXQt project has developed a CLI mime apps toolset (qtxdg-mat).
LXQt uses the '$desktop-mimeapps.list' file to store the associations and
defaults.
In xdg-settings we use the already existent set_browser_mime() function so
that the fix_local_desktop_file() can be run. set_browser_mime calls uses
xdg-mime to set the protocols, so LXQt desktop aware mimeapps.list is
properly taken care.

4 files changed, 202 insertions, 6 deletions

diff --git a/scripts/xdg-email.in b/scripts/xdg-email.in
index 6135b24..b302dc4 100644
--- a/scripts/xdg-email.in
+++ b/scripts/xdg-email.in
@@ -191,6 +191,31 @@ open_gnome()
 }
 
 
+open_lxqt()
+{
+    local client
+    local desktop
+    desktop=`qtxdg-mat def-email-client 2>/dev/null`
+    client=`desktop_file_to_binary "$desktop"`
+    echo $client | grep -E 'thunderbird|icedove' > /dev/null 2>&1
+    if [ $? -eq 0 ] ; then
+        run_thunderbird "$client" "$1"
+    fi
+
+    if qtxdg-mat open --help 2>/dev/null 1>&2; then
+        qtxdg-mat open "$1"
+    else
+        exit_failure_operation_impossible "no method available for opening '$1'"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+
 open_xfce()
 {
     DEBUG 1 "Running exo-open \"$1\""
@@ -452,6 +477,10 @@ case "$DE" in
     open_gnome3 "${mailto}"
     ;;
 
+    lxqt)
+    open_lxqt "${mailto}"
+    ;;
+
     xfce)
     open_xfce "${mailto}"
     ;;
@@ -460,7 +489,7 @@ case "$DE" in
     open_flatpak "${mailto}"
     ;;
 
-    generic|lxqt|enlightenment)
+    generic|enlightenment)
     open_generic "${mailto}"
     ;;
 
diff --git a/scripts/xdg-mime.in b/scripts/xdg-mime.in
index 97e7368..1f7c5e3 100644
--- a/scripts/xdg-mime.in
+++ b/scripts/xdg-mime.in
@@ -99,6 +99,21 @@ info_gnome()
     fi
 }
 
+info_lxqt()
+{
+    if qtxdg-mat mimetype --help 2>/dev/null 1>&2; then
+        qtxdg-mat mimetype "$1" 2>/dev/null
+    else
+        exit_failure_operation_impossible "no method available for querying MIME type of '$filename'"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
 info_generic()
 {
     if mimetype --version >/dev/null 2>&1; then
@@ -243,6 +258,23 @@ make_default_kde()
     fi
 }
 
+make_default_lxqt()
+{
+    # $1 is vendor-name.desktop
+    # $2 is mime/type
+    if qtxdg-mat defapp --help 2>/dev/null 1>&2; then
+        qtxdg-mat defapp --set "$1" "$2" 1>/dev/null
+    else
+        exit_failure_operation_impossible "no method available for setting the default application for MIME type(s) of '$mimetype'"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
 make_default_generic()
 {
     # $1 is vendor-name.desktop
@@ -474,6 +506,21 @@ defapp_kde()
     fi
 }
 
+defapp_lxqt()
+{
+    if qtxdg-mat defapp --help 2>/dev/null 1>&2; then
+        qtxdg-mat defapp "$1"
+    else
+        exit_failure_operation_impossible "no method available for querying the default application for MIME type of '$mimetype'"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
 [ x"$1" != x"" ] || exit_failure_syntax
 
 mode=
@@ -576,6 +623,8 @@ if [ "$action" = "makedefault" ]; then
         exit_failure_syntax "mimetype argument missing"
     fi
 
+    detectDE
+
     while [ $# -gt 0 ] ; do
         case $1 in
           -*)
@@ -585,8 +634,16 @@ if [ "$action" = "makedefault" ]; then
         mimetype="$1"
         shift
 
-        make_default_kde "$filename" "$mimetype"
-        make_default_generic "$filename" "$mimetype"
+        case "$DE" in
+            lxqt)
+            make_default_lxqt "$filename" "$mimetype"
+            ;;
+
+            *)
+            make_default_kde "$filename" "$mimetype"
+            make_default_generic "$filename" "$mimetype"
+            ;;
+        esac
     done
     exit_success
 fi
@@ -609,6 +666,10 @@ if [ "$action" = "info" ]; then
         info_gnome "$filename"
         ;;
 
+        lxqt)
+        info_lxqt "$filename"
+        ;;
+
         *)
         info_generic "$filename"
         ;;
@@ -623,8 +684,15 @@ if [ "$action" = "defapp" ]; then
         defapp_kde "$mimetype"
     fi
 
-    defapp_generic "$mimetype"
+    case "$DE" in
+        lxqt)
+        defapp_lxqt "$mimetype"
+        ;;
 
+        *)
+        defapp_generic "$mimetype"
+        ;;
+    esac
     exit_failure_operation_impossible "no method available for querying default application for '$mimetype'"
 fi
 
diff --git a/scripts/xdg-open.in b/scripts/xdg-open.in
index c1bf58e..5b59263 100755
--- a/scripts/xdg-open.in
+++ b/scripts/xdg-open.in
@@ -520,7 +520,17 @@ open_lxde()
 
 open_lxqt()
 {
-    open_generic "$1"
+    if qtxdg-mat open --help 2>/dev/null 1>&2; then
+        qtxdg-mat open "$1"
+    else
+        exit_failure_operation_impossible "no method available for opening '$1'"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
 }
 
 [ x"$1" != x"" ] || exit_failure_syntax
diff --git a/scripts/xdg-settings.in b/scripts/xdg-settings.in
index 40f739e..ed3554c 100755
--- a/scripts/xdg-settings.in
+++ b/scripts/xdg-settings.in
@@ -386,6 +386,49 @@ set_browser_gnome3()
     done
 }
 # }}} GNOME 3.x
+# {{{ LXQt
+
+get_browser_lxqt()
+{
+    if qtxdg-mat def-web-browser --help 2> /dev/null 1>&2; then
+        qtxdg-mat def-web-browser 2>/dev/null
+    else
+        exit_failure_operation_impossible "no method for getting the default browser"
+    fi
+}
+
+check_browser_lxqt()
+{
+    desktop="$1"
+    check="`desktop_file_to_binary "$1"`"
+    if [ -z "$check" ]; then
+        echo no
+        exit_success
+    fi
+
+    if qtxdg-mat def-web-browser --help 2>/dev/null 1>&2; then
+        browser="`qtxdg-mat def-web-browser`" 2>/dev/null
+        if [ x"$browser" != x"$desktop" ]; then
+            echo no
+            exit_success
+        fi
+    else
+        exit_failure_operation_impossible "no method for checking the default browser"
+    fi
+}
+
+set_browser_lxqt()
+{
+    binary="`desktop_file_to_binary "$1"`"
+    [ "$binary" ] || exit_failure_file_missing
+    set_browser_mime "$1" || return
+
+    # Set the default browser.
+    for protocol in http https about unknown; do
+        set_browser_mime "$1" "x-scheme-handler/$protocol" || return
+    done
+}
+# }}} LXQt
 # {{{ xfce
 
 get_browser_xfce()
@@ -678,6 +721,48 @@ set_url_scheme_handler_gnome()
 }
 
 # }}} GNOME
+# {{{ LXQt
+
+get_url_scheme_handler_lxqt()
+{
+    if qtxdg-mat defapp --help 2> /dev/null 1>&2; then
+        qtxdg-mat defapp "x-scheme-handler/$1" 2> /dev/null
+    else
+        exit_failure_operation_impossible "no method for getting the url_scheme_handler"
+    fi
+}
+
+check_url_scheme_handler_lxqt()
+{
+    desktop="$2"
+    check="`desktop_file_to_binary "$2"`"
+    if [ -z "$check" ]; then
+        echo no
+        exit_success
+    fi
+
+    if qtxdg-mat defapp --help 2> /dev/null 1>&2; then
+        handler="`qtxdg-mat defapp "x-scheme-handler/$1"`" 2> /dev/null
+        if [ x"$handler" != x"$desktop" ]; then
+            echo no
+            exit_success
+        fi
+    else
+        exit_failure_operation_impossible "no method for checking the url_scheme_handler for desktop $DE"
+    fi
+}
+
+set_url_scheme_handler_lxqt()
+{
+    binary="`desktop_file_to_binary "$2"`"
+    [ "$binary" ] || exit_failure_file_missing
+    set_browser_mime "$2" || return
+
+    # Set the default browser.
+    set_browser_mime "$2" "x-scheme-handler/$1" || return
+}
+
+# }}} LXQt
 # {{{ GNOME 3.x
 
 get_url_scheme_handler_gnome3()
@@ -880,11 +965,15 @@ case "$DE" in
     dispatch_specific gnome3 "$@"
     ;;
 
+    lxqt)
+    dispatch_specific lxqt "$@"
+    ;;
+
     xfce)
     dispatch_specific xfce "$@"
     ;;
 
-    generic|lxqt|enlightenment)
+    generic|enlightenment)
     dispatch_specific generic "$@"
     ;;