Import of the watch repository from Pebble

src/fw/apps/demo_apps/text_layout.c

@@ -0,0 +1,161 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "text_layout.h"
+
+#include "applib/app.h"
+#include "applib/fonts/fonts.h"
+#include "applib/ui/ui.h"
+#include "kernel/pbl_malloc.h"
+#include "process_management/app_manager.h"
+#include "process_state/app_state/app_state.h"
+#include "system/logging.h"
+#include <limits.h>
+
+struct AppState {
+  Window window;
+  ScrollLayer scroll_layer;
+  TextLayer text;
+};
+
+static GFont s_system_font;
+static GFont s_fonts[8];
+static int s_font_selection = 0;
+
+static const char* ALL_CODEPOINTS =
+" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿıŁłŒœŠšŸŽžƒˆˇ˘˙˚˛˜˝π–—‘’‚“”„†‡•…‰‹›⁄€™Ω∂∆∏∑−√∞∫≈≠≤≥◊fifl";
+
+static void select_click_handler(ClickRecognizerRef recognizer, void* callback_param) {
+  (void) recognizer;
+  struct AppState* data = (struct AppState*) callback_param;
+
+  PBL_LOG(LOG_LEVEL_DEBUG, "I should be changing the font!");
+  if (++s_font_selection > 7) {
+    s_font_selection = 0;
+  }
+  ScrollLayer* scroll_layer = &data->scroll_layer;
+  TextLayer* text = &data->text;
+
+  text_layer_set_font(text, s_fonts[s_font_selection]);
+  GSize max_size = graphics_text_layout_get_max_used_size(app_state_get_graphics_context(),
+                              text->text, text->font,
+                              GRect(0, 0, text->layer.bounds.size.w, SHRT_MAX),
+                              text->overflow_mode, text->text_alignment, NULL);
+
+  text_layer_set_size(text, max_size);
+  static const int vert_scroll_padding = 4;
+  scroll_layer_set_content_size(scroll_layer, GSize(144, max_size.h + vert_scroll_padding));
+}
+
+#if 0
+static void select_long_click_handler(ClickRecognizerRef recognizer, struct AppState* data) {
+  (void) data;
+  (void) recognizer;
+
+  PBL_LOG(LOG_LEVEL_DEBUG, "SELECT loooong clicked!");
+}
+#endif
+
+static void click_config_provider(struct AppState* data) {
+  // The config that gets passed in, has already the UP and DOWN buttons configured
+  // to scroll up and down. It's possible to override that here, if needed.
+
+  // Configure how the SELECT button should behave:
+  window_single_click_subscribe(BUTTON_ID_SELECT, (ClickHandler) select_click_handler);
+  window_long_click_subscribe(BUTTON_ID_SELECT, 0, (ClickHandler) select_click_handler, NULL);
+  (void)data;
+}
+
+static void prv_window_load(Window *window) {
+  struct AppState* data = window_get_user_data(window);
+
+  ScrollLayer* scroll_layer = &data->scroll_layer;
+  scroll_layer_init(scroll_layer, &window->layer.bounds);
+  scroll_layer_set_click_config_onto_window(scroll_layer, window);
+  scroll_layer_set_callbacks(scroll_layer, (ScrollLayerCallbacks) {
+    .click_config_provider = (ClickConfigProvider) click_config_provider,
+  });
+  scroll_layer_set_context(scroll_layer, data);
+  scroll_layer_set_content_size(scroll_layer, GSize(144, 672));
+
+  const GRect max_text_bounds = GRect(0, 0, 144, 672);
+  TextLayer* text = &data->text;
+  text_layer_init(text, &max_text_bounds);
+  text_layer_set_font(text, s_system_font);
+  text_layer_set_text(text, ALL_CODEPOINTS);
+
+  // Trim text layer and scroll content to fit text box
+  GSize max_size = text_layer_get_content_size(app_state_get_graphics_context(), text);
+  text_layer_set_size(text, max_size);
+  static const int vert_scroll_padding = 4;
+  scroll_layer_set_content_size(scroll_layer, GSize(144, max_size.h + vert_scroll_padding));
+
+  scroll_layer_add_child(scroll_layer, &text->layer);
+  layer_add_child(&window->layer, &scroll_layer->layer);
+}
+
+static void push_window(struct AppState *data) {
+  Window* window = &data->window;
+  window_init(window, WINDOW_NAME("Text Layout Demo"));
+  window_set_user_data(window, data);
+  window_set_window_handlers(window, &(WindowHandlers) {
+    .load = prv_window_load,
+  });
+  const bool animated = true;
+  app_window_stack_push(window, animated);
+}
+
+
+////////////////////
+// App boilerplate
+
+static void handle_init(void) {
+  s_fonts[0] = fonts_get_system_font(FONT_KEY_GOTHIC_14);
+  s_fonts[1] = fonts_get_system_font(FONT_KEY_GOTHIC_14_BOLD);
+  s_fonts[2] = fonts_get_system_font(FONT_KEY_GOTHIC_18);
+  s_fonts[3] = fonts_get_system_font(FONT_KEY_GOTHIC_18_BOLD);
+  s_fonts[4] = fonts_get_system_font(FONT_KEY_GOTHIC_24);
+  s_fonts[5] = fonts_get_system_font(FONT_KEY_GOTHIC_24_BOLD);
+  s_fonts[6] = fonts_get_system_font(FONT_KEY_GOTHIC_28);
+  s_fonts[7] = fonts_get_system_font(FONT_KEY_GOTHIC_28_BOLD);
+  s_system_font = s_fonts[0];
+  struct AppState* data = app_malloc_check(sizeof(struct AppState));
+
+  app_state_set_user_data(data);
+  push_window(data);
+}
+
+static void handle_deinit(void) {
+  struct AppState* data = app_state_get_user_data();
+  app_free(data);
+}
+
+static void s_main(void) {
+  handle_init();
+
+  app_event_loop();
+
+  handle_deinit();
+}
+
+const PebbleProcessMd* text_layout_get_info() {
+  static const PebbleProcessMdSystem text_layout_info = {
+    .common.main_func = &s_main,
+    .name = "\xF3\xBE\x87\x8A Code Points Overflow This!" // The first 4 bytes is a UTF-8 codepoint for the hamster emoji.
+  };
+  return (const PebbleProcessMd*) &text_layout_info;
+}
+