From c56df33d1880d22372e21ef0ebf5dd8805d65a76 Mon Sep 17 00:00:00 2001
From: Jeremy Attali <jeremy.attali@gmail.com>
Date: Sun, 29 Dec 2019 02:12:17 -0500
Subject: [PATCH] feat(swappy): introduce file option

---
 include/swappy.h  |  1 +
 src/application.c | 51 +++++++++++++++++++++++++++++++++++------------
 2 files changed, 39 insertions(+), 13 deletions(-)

diff --git a/include/swappy.h b/include/swappy.h
index 8d98b2b..fa2de24 100644
--- a/include/swappy.h
+++ b/include/swappy.h
@@ -123,6 +123,7 @@ struct swappy_state {
 
   /* Options */
   char *geometry_str;
+  char *file_str;
 
   struct swappy_box *geometry;
 
diff --git a/src/application.c b/src/application.c
index 7c6f0c2..32b3037 100644
--- a/src/application.c
+++ b/src/application.c
@@ -4,6 +4,7 @@
 #include <time.h>
 
 #include "clipboard.h"
+#include "file.h"
 #include "notification.h"
 #include "paint.h"
 #include "render.h"
@@ -522,27 +523,44 @@ static bool init_gtk_window(struct swappy_state *state) {
   return true;
 }
 
-static gboolean is_geometry_valid(struct swappy_state *state) {
+static gboolean has_option_geometry(struct swappy_state *state) {
   return (state->geometry_str != NULL);
 }
 
+static gboolean has_option_file(struct swappy_state *state) {
+  return (state->file_str != NULL);
+}
+
+static gboolean is_file_valid(const char *file) {
+  cairo_surface_t *surface = cairo_image_surface_create_from_png(file);
+  cairo_status_t status = cairo_surface_status(surface);
+
+  if (status) {
+    g_warning("error while loading: %s - cairo status: %s", file,
+              cairo_status_to_string(status));
+    return false;
+  }
+
+  return true;
+}
+
 static gint command_line_handler(GtkApplication *app,
                                  GApplicationCommandLine *cmdline,
                                  struct swappy_state *state) {
-  if (!is_geometry_valid(state)) {
-    g_printerr("geometry parameter is missing\n");
-    return EXIT_FAILURE;
+  if (has_option_geometry(state)) {
+    if (!screencopy_parse_geometry(state)) {
+      return EXIT_FAILURE;
+    }
+
+    if (!screencopy_init(state)) {
+      return EXIT_FAILURE;
+    }
   }
 
-  g_debug("geometry is: %s", state->geometry_str);
-
-  if (!screencopy_parse_geometry(state)) {
-    return EXIT_FAILURE;
-  }
-
-  if (!screencopy_init(state)) {
-    g_printerr("unable to initialize zwlr_screencopy_v1\n");
-    return false;
+  if (has_option_file(state)) {
+    if (!is_file_valid(state->file_str)) {
+      return EXIT_FAILURE;
+    }
   }
 
   if (!init_gtk_window(state)) {
@@ -562,6 +580,13 @@ bool application_init(struct swappy_state *state) {
           .description =
               "Set the region to capture. (Can be an output of slurp)",
       },
+      {
+          .long_name = "file",
+          .short_name = 'f',
+          .arg = G_OPTION_ARG_STRING,
+          .arg_data = &state->file_str,
+          .description = "Load a file at a specific path.",
+      },
       {NULL}};
 
   state->app = gtk_application_new("me.jtheoof.swappy",