feat(config): have overridable defaults

Defaults:

 - `save_dir`
 - `line_size`
 - `text_font`
 - `text_size`

Closes #1

README.md

@@ -42,6 +42,27 @@ Grab a swappshot from a specific window under Sway, using `swaymsg` and `jq`:
 grim -g "$(swaymsg -t get_tree | jq -r '.. | select(.pid? and .visible?) | .rect | "\(.x),\(.y) \(.width)x\(.height)"' | slurp)" - | swappy -f -
 ```
 
+## Config
+
+The config file is located at `$XDG_CONFIG_HOME/swappy/config` or at `$HOME/.config/swappy/config`.
+
+The file follows the GLib `conf` format. See the `man` page for details. There is example config file [here](example/config).
+
+The following lines can be used as swappy's default:
+
+```
+	[Default]
+	save_dir=$HOME/Desktop
+	line_size=5
+	text_size=20
+	text_font=sans-serif
+```
+
+- `save_dir` is where swappshots will be saved, can contain env variables and must exist in your filesystem
+- `line_size` is the default line size (must be between 1 and 50)
+- `text_size` is the default text size (must be between 10 and 50)
+- `text_font` is the font used to render text, its format is pango friendly
+
 ## Keyboard Shortcuts
 
 - `Ctrl+b`: Toggle Paint Panel

example/config

@@ -0,0 +1,5 @@
+[Default]
+save_dir=$HOME/Desktop
+line_size=5
+text_size=20
+text_font=sans-serif

include/config.h

@@ -1,3 +1,8 @@
 #include "swappy.h"
 
-bool config_get_storage_path(struct swappy_state *state);
+#define CONFIG_LINE_SIZE_DEFAULT 5
+#define CONFIG_TEXT_FONT_DEFAULT "sans-serif"
+#define CONFIG_TEXT_SIZE_DEFAULT 20
+
+void config_load(struct swappy_state *state);
+void config_free(struct swappy_state *state);

include/swappy.h

@@ -16,12 +16,9 @@
 
 #define GEOMETRY_PATTERN "xx,yy wwxhh"
 
-#define SWAPPY_STROKE_SIZE_DEFAULT 5
-#define SWAPPY_STROKE_SIZE_MIN 1
-#define SWAPPY_STROKE_SIZE_MAX 50
+#define SWAPPY_LINE_SIZE_MIN 1
+#define SWAPPY_LINE_SIZE_MAX 50
 
-#define SWAPPY_TEXT_FONT_DEFAULT "serif"
-#define SWAPPY_TEXT_SIZE_DEFAULT 20
 #define SWAPPY_TEXT_SIZE_MIN 10
 #define SWAPPY_TEXT_SIZE_MAX 50
 
@@ -49,6 +46,7 @@ struct swappy_paint_text {
   double b;
   double a;
   double s;
+  gchar *font;
   gchar *text;
   size_t cursor;
   struct swappy_point from;
@@ -124,7 +122,7 @@ struct swappy_state_ui {
   GtkRadioButton *custom;
   GtkColorButton *color;
 
-  GtkButton *stroke_size;
+  GtkButton *line_size;
   GtkButton *text_size;
 };
 
@@ -170,17 +168,24 @@ struct swappy_wayland {
 #endif
 };
 
+struct swappy_config {
+  char *config_file;
+  char *save_dir;
+  guint32 line_size;
+  guint32 text_size;
+  char *text_font;
+};
+
 struct swappy_state {
   GtkApplication *app;
 
   struct swappy_state_ui *ui;
+  struct swappy_config *config;
   struct swappy_wayland *wl;
 
   cairo_surface_t *cairo_surface;
   GList *patterns;  // List of cairo_pattern_t
 
-  char *storage_path;
-
   enum swappy_paint_type mode;
 
   /* Options */

src/application.c

@@ -5,6 +5,7 @@
 
 #include "buffer.h"
 #include "clipboard.h"
+#include "config.h"
 #include "file.h"
 #include "notification.h"
 #include "paint.h"
@@ -22,7 +23,7 @@ static void update_ui_undo_redo(struct swappy_state *state) {
 }
 
 static void update_ui_stroke_size_widget(struct swappy_state *state) {
-  GtkButton *button = GTK_BUTTON(state->ui->stroke_size);
+  GtkButton *button = GTK_BUTTON(state->ui->line_size);
   char label[255];
   snprintf(label, 255, "%.0lf", state->settings.w);
   gtk_button_set_label(button, label);
@@ -115,15 +116,15 @@ static void action_stroke_size_decrease(struct swappy_state *state) {
 
   state->settings.w -= step;
 
-  if (state->settings.w < SWAPPY_STROKE_SIZE_MIN) {
-    state->settings.w = SWAPPY_STROKE_SIZE_MIN;
+  if (state->settings.w < SWAPPY_LINE_SIZE_MIN) {
+    state->settings.w = SWAPPY_LINE_SIZE_MIN;
   }
 
   update_ui_stroke_size_widget(state);
 }
 
 static void action_stroke_size_reset(struct swappy_state *state) {
-  state->settings.w = SWAPPY_STROKE_SIZE_DEFAULT;
+  state->settings.w = state->config->line_size;
 
   update_ui_stroke_size_widget(state);
 }
@@ -132,8 +133,8 @@ static void action_stroke_size_increase(struct swappy_state *state) {
   guint step = state->settings.w >= 10 ? 5 : 1;
   state->settings.w += step;
 
-  if (state->settings.w > SWAPPY_STROKE_SIZE_MAX) {
-    state->settings.w = SWAPPY_STROKE_SIZE_MAX;
+  if (state->settings.w > SWAPPY_LINE_SIZE_MAX) {
+    state->settings.w = SWAPPY_LINE_SIZE_MAX;
   }
 
   update_ui_stroke_size_widget(state);
@@ -150,7 +151,7 @@ static void action_text_size_decrease(struct swappy_state *state) {
   update_ui_text_size_widget(state);
 }
 static void action_text_size_reset(struct swappy_state *state) {
-  state->settings.t = SWAPPY_TEXT_SIZE_DEFAULT;
+  state->settings.t = state->config->text_size;
   update_ui_text_size_widget(state);
 }
 static void action_text_size_increase(struct swappy_state *state) {
@@ -188,14 +189,14 @@ void application_finish(struct swappy_state *state) {
   paint_free_all(state);
   buffer_free_all(state);
   cairo_surface_destroy(state->cairo_surface);
-  g_free(state->storage_path);
   g_free(state->file_str);
   g_free(state->geometry_str);
   g_free(state->geometry);
   g_free(state->ui);
   g_object_unref(state->app);
 
   wayland_finish(state);
+  config_free(state);
 }
 
 static void action_save_area_to_file(struct swappy_state *state) {
@@ -213,7 +214,7 @@ static void action_save_area_to_file(struct swappy_state *state) {
   c_time_string = ctime(&current_time);
   c_time_string[strlen(c_time_string) - 1] = '\0';
   char path[MAX_PATH];
-  snprintf(path, MAX_PATH, "%s/%s %s.png", state->storage_path, "Swappshot",
+  snprintf(path, MAX_PATH, "%s/%s %s.png", state->config->save_dir, "Swappshot",
            c_time_string);
   gdk_pixbuf_savev(pixbuf, path, "png", NULL, NULL, &error);
 
@@ -561,7 +562,7 @@ static bool load_layout(struct swappy_state *state) {
   state->ui->color =
       GTK_COLOR_BUTTON(gtk_builder_get_object(builder, "custom-color-button"));
 
-  state->ui->stroke_size =
+  state->ui->line_size =
       GTK_BUTTON(gtk_builder_get_object(builder, "stroke-size-button"));
   state->ui->text_size =
       GTK_BUTTON(gtk_builder_get_object(builder, "text-size-button"));
@@ -616,9 +617,21 @@ static gboolean is_file_from_stdin(const char *file) {
   return (strcmp(file, "-") == 0);
 }
 
+static void init_settings(struct swappy_state *state) {
+  state->settings.r = 1;
+  state->settings.g = 0;
+  state->settings.b = 0;
+  state->settings.a = 1;
+  state->settings.w = state->config->line_size;
+  state->settings.t = state->config->text_size;
+}
+
 static gint command_line_handler(GtkApplication *app,
                                  GApplicationCommandLine *cmdline,
                                  struct swappy_state *state) {
+  config_load(state);
+  init_settings(state);
+
   if (!wayland_init(state)) {
     g_warning(
         "error while initializing wayland objects, can only be used in file "
@@ -688,13 +701,6 @@ bool application_init(struct swappy_state *state) {
   g_signal_connect(state->app, "command-line", G_CALLBACK(command_line_handler),
                    state);
 
-  state->settings.r = 1;
-  state->settings.g = 0;
-  state->settings.b = 0;
-  state->settings.a = 1;
-  state->settings.w = SWAPPY_STROKE_SIZE_DEFAULT;
-  state->settings.t = SWAPPY_TEXT_SIZE_DEFAULT;
-
   return true;
 }