From 7936c07b4100895c412e6068e5905ac0c6e44938 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franti=C5=A1ek=20Boh=C3=A1=C4=8Dek?=
 <fandabohacek@gmail.com>
Date: Sun, 27 Jun 2021 15:35:30 +0200
Subject: [PATCH] feat: add text zoom to file browser

---
 file-browser/include/gui_list_commands.h |  2 ++
 file-browser/src/gui_list_commands.c     | 25 ++++++++++++++++++++++++
 file-browser/src/window_initial.c        |  1 +
 3 files changed, 28 insertions(+)

diff --git a/file-browser/include/gui_list_commands.h b/file-browser/include/gui_list_commands.h
index 92d1f401342de8c319e93b936324d8cdc2741ba9..59d85761d4026c9e930d64f746e507fd98a3b9ce 100644
--- a/file-browser/include/gui_list_commands.h
+++ b/file-browser/include/gui_list_commands.h
@@ -11,6 +11,8 @@ typedef struct {
   void *state;
   container_t *container;
 
+  font_t *font;
+
   gui_t *gui;
   window_t *window;
 } gui_list_command_state_t;
diff --git a/file-browser/src/gui_list_commands.c b/file-browser/src/gui_list_commands.c
index c1d45369dc5a32b784fe4a3b72a912d6226a3b09..d25006154e6dfc3a4eef1d62f06f51021f0ec468 100644
--- a/file-browser/src/gui_list_commands.c
+++ b/file-browser/src/gui_list_commands.c
@@ -13,6 +13,22 @@ static void command_handler_gui_list_clicked(void *state, int amount) {
   }
 }
 
+static void command_handler_zoom_in(void *state,
+                                 int amount) {
+  gui_list_command_state_t *click_state = (gui_list_command_state_t *)state;
+  if (click_state->window == click_state->gui->active_window &&
+      click_state->font != NULL && amount != 0) {
+    click_state->font->size += amount > 0 ? 1 : -1;
+    gui_list_container_set_item_height(click_state->container,
+                                       click_state->font->size);
+  }
+}
+
+static void command_handler_zoom_out(void *state,
+                                    int amount) {
+  command_handler_zoom_in(state, -amount);
+}
+
 static void command_handler_move(void *state, direction_t direction, int amount) {
   gui_list_command_state_t *click_state = (gui_list_command_state_t *)state;
   if (click_state->window == click_state->gui->active_window) {
@@ -54,4 +70,13 @@ void gui_list_commands_register(commands_t *commands, gui_list_command_state_t *
                     command_handler_move_right, state);
   commands_register(commands, IN_ENCODER_ROTATE, ROTATION_ENCODER_VERTICAL,
                     command_handler_move_down, state);
+
+  if (state->font != NULL) {
+    commands_register(commands, IN_KEYBOARD, KEYBOARD_ZOOM_IN,
+                      command_handler_zoom_in, state);
+    commands_register(commands, IN_KEYBOARD, KEYBOARD_ZOOM_OUT,
+                      command_handler_zoom_out, state);
+    commands_register(commands, IN_ENCODER_ROTATE, ROTATION_ENCODER_ZOOM,
+                      command_handler_zoom_in, state);
+  }
 }
diff --git a/file-browser/src/window_initial.c b/file-browser/src/window_initial.c
index aad21606882b9db91a0d3aee5062507615fcf2f6..ecbc2227f55dc7e5b16f9096b5f6cada6ac71789 100644
--- a/file-browser/src/window_initial.c
+++ b/file-browser/src/window_initial.c
@@ -114,6 +114,7 @@ static void *initial_window_construct(window_t *window, void *state) {
   istate->click_state.container = istate->list_container;
   istate->click_state.state = state;
   istate->click_state.clicked = initial_window_item_clicked;
+  istate->click_state.font = &istate->font;
   istate->click_state.gui = istate->gui;
   istate->click_state.window = window;