3 files changed, 299 insertions(+), 0 deletions(-)

A text-viewer/include/text_viewer.h
A text-viewer/src/main.c
A text-viewer/src/text_viewer.c

@@ 0,0 1,39 @@
+#ifndef __TEXT_VIEWER_H__
+#define __TEXT_VIEWER_H__
+
+#include "gui.h"
+#include "gui_component_text_view.h"
+#include "mzapo_pheripherals.h"
+
+typedef enum {
+  FILER_SUCCESS,
+  FILER_NOT_FOUND,
+  FILER_NO_PERMISSIONS,
+  FILER_FILE_CANT_OPEN,
+  FILER_CANNOT_READ,
+  FILER_UNKNOWN,
+} file_error_t;
+
+typedef struct {
+  gui_t gui;
+  char *path;
+
+  mzapo_pheripherals_t pheripherals;
+  multiline_text_t *multiline_text;
+  logger_t *logger;
+
+  bool running;
+
+  font_t font;
+} text_viewer_t;
+
+text_viewer_t text_viewer_create(char *path, mzapo_pheripherals_t pheripherals,
+                                 logger_t *logger, font_t font);
+
+void text_viewer_destroy(text_viewer_t *text_viewer);
+
+file_error_t text_viewer_load_file(text_viewer_t *text_viewer);
+
+void text_viewer_start_loop(text_viewer_t *text_viewer);
+
+#endif // __TEXT_VIEWER_H__

@@ 0,0 1,81 @@
+#include "font.h"
+#include "mzapo_led_strip.h"
+#include "nonblocking_io.h"
+#include "serialize_lock.h"
+#include <stdio.h>
+#include <unistd.h>
+#include "logger.h"
+#include "display_utils.h"
+#include "mzapo_pheripherals.h"
+#include "text_viewer.h"
+
+typedef enum {
+  SUCCESS,
+} error_t;
+
+int main(int argc, char *argv[]) {
+  struct termios oldstdin;
+
+  logger_t logger =
+      logger_create(LOG_DEBUG, stdout, stdout, stderr, stderr, NULL);
+
+  /* Try to acquire lock the first */
+  if (serialize_lock(1) <= 0) {
+    printf("System is occupied\n");
+    logger_warn(&logger, __FILE__, __FUNCTION__, __LINE__, "System is occupied");
+
+    if (1) {
+      /* Wait till application holding lock releases IT or exits */
+      logger_info(&logger, __FILE__, __FUNCTION__, __LINE__,
+                  "Waiting");
+      serialize_lock(0);
+    }
+  }
+
+  if (argc < 2) {
+    logger_info(&logger, __FILE__, __FUNCTION__, __LINE__, "Not enough arguments");
+  }
+
+  display_t display = mzapo_create_display();
+  mzapo_rgb_led_t rgb_leds = mzapo_create_rgb_led();
+  mzapo_ledstrip_t ledstrip = mzapo_create_ledstrip();
+  void* knobs = mzapo_get_knobs_address();
+
+  if (!mzapo_check_pheripherals(&ledstrip, &rgb_leds, &display, &knobs)) {
+    logger_error(&logger, __FILE__, __FUNCTION__, __LINE__, "Could not initialize some of the pheripherals.");
+  }
+
+  mzapo_pheripherals_t pheripherals = mzapo_pheripherals_create(&ledstrip, &rgb_leds, &display, &knobs);
+
+  font_t font = font_create(font_rom8x16);
+  font.char_spacing = 2;
+
+  text_viewer_t text_viewer = text_viewer_create(argv[1], pheripherals, &logger, font);
+
+  logger_info(&logger, __FILE__, __FUNCTION__, __LINE__,
+              "Loading file");
+  file_error_t error = text_viewer_load_file(&text_viewer);
+  if (error != FILER_SUCCESS) {
+    logger_error(&logger, __FILE__, __FUNCTION__, __LINE__, "Could not load file.");
+    return 1;
+  }
+
+  file_set_nonblocking(STDIN_FILENO, &oldstdin);
+  logger_info(&logger, __FILE__, __FUNCTION__, __LINE__,
+              "Starting text viewer");
+  text_viewer_start_loop(&text_viewer);
+  logger_info(&logger, __FILE__, __FUNCTION__, __LINE__,
+              "Closing application");
+
+  text_viewer_destroy(&text_viewer);
+  display_deinit(&display);
+
+  file_set_blocking(STDIN_FILENO, &oldstdin);
+
+  serialize_unlock();
+  
+  logger_info(&logger, __FILE__, __FUNCTION__, __LINE__,
+              "Application quit");
+
+  return SUCCESS;
+}

@@ 0,0 1,179 @@
+#include "text_viewer.h"
+#include "display_utils.h"
+#include "gui.h"
+#include "gui_component_line.h"
+#include "input.h"
+#include "renderer.h"
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "gui_component_text.h"
+#include "gui_component_text_view.h"
+#include <string.h>
+#include <libgen.h>
+
+text_viewer_t text_viewer_create(char *path, mzapo_pheripherals_t pheripherals,
+                                 logger_t *logger, font_t font) {
+  text_viewer_t text_viewer = {
+      .pheripherals = pheripherals,
+      .multiline_text = NULL,
+      .path = path,
+      .logger = logger,
+      .font = font
+  };
+
+  return text_viewer;
+}
+
+void text_viewer_destroy(text_viewer_t *text_viewer) {
+  if (text_viewer->multiline_text != NULL &&
+      text_viewer->multiline_text->text != NULL) {
+    free(text_viewer->multiline_text->text);
+  }
+}
+
+file_error_t file_error_from_errno() {
+  switch (errno) {
+  case ENOENT:
+    return FILER_NOT_FOUND;
+  case EACCES:
+    return FILER_NO_PERMISSIONS;
+  default:
+    return FILER_FILE_CANT_OPEN;
+  }
+}
+
+file_error_t text_viewer_load_file(text_viewer_t *text_viewer) {
+  FILE *file = fopen(text_viewer->path, "r");
+
+  if (file == NULL) {
+    return file_error_from_errno();
+  }
+
+  fseek(file, 0, SEEK_END);
+  long fsize = ftell(file);
+  fseek(file, 0, SEEK_SET);
+
+  char *data = malloc(sizeof(char) * (fsize + 1));
+  data[fsize] = '\0';
+  if (data == NULL) {
+    return FILER_UNKNOWN;
+  }
+
+  long result = fread(data, sizeof(char), fsize, file);
+  if (result != fsize) {
+    fclose(file);
+    return FILER_CANNOT_READ;
+  }
+
+  fclose(file);
+
+  multiline_text_t *text = gui_multiline_text_create(&text_viewer->font, WHITE_PIXEL, data);
+  if (text == NULL) {
+    return FILER_UNKNOWN;
+  }
+
+  text_viewer->multiline_text = text;
+
+  return FILER_SUCCESS;
+}
+
+static void text_viewer_init_gui(text_viewer_t *text_viewer,
+                                 commands_t *commands, renderer_t *renderer) {
+  gui_t gui = gui_create(text_viewer->logger, commands, renderer,
+                         &text_viewer->pheripherals);
+ 
+  text_viewer->gui = gui;
+}
+
+static void command_handle_exit(void *state, int amount) {
+  text_viewer_t *text_viewer = (text_viewer_t*)state;
+  text_viewer->running = false;
+}
+
+static void text_viewer_register_commands(text_viewer_t *text_viewer, commands_t *commands) {
+  commands_register(commands, IN_KEYBOARD, 'e', command_handle_exit,
+                    text_viewer);
+  commands_register(commands, IN_ENCODER_CLICK, 0, command_handle_exit,
+                    text_viewer);
+}
+
+static container_t *text_viewer_gui_add_name_and_line(text_viewer_t *text_viewer, window_t *window, text_t *name_text, component_t *name_and_line_components) {
+  container_t name_and_line =
+      gui_group_container_create(0, 0, name_and_line_components, 2);
+
+  component_t name = gui_text_create(name_text, 5, 3, 0, 0);
+  component_t line = gui_line_create(&WHITE_PIXEL, 0, name.height + name.y,
+                                     text_viewer->gui.size.x, 1);
+
+  gui_group_container_add_component(&name_and_line, name);
+  gui_group_container_add_component(&name_and_line, line);
+
+  name_and_line.width = text_viewer->gui.size.x;
+  name_and_line.height = name.height + line.height + 3;
+  return gui_window_add_container(window, name_and_line);
+}
+
+static container_t *text_viewer_gui_add_view_container(text_viewer_t *text_viewer, container_t *name_and_line, window_t *window) {
+  container_t text_view_container =
+      gui_one_container_create(0, name_and_line->y + name_and_line->height + 2);
+
+  text_view_container.width = text_viewer->gui.size.x;
+  text_view_container.height = text_viewer->gui.size.y - name_and_line->height;
+
+  text_view_container.focused = true;
+  return gui_window_add_container(window, text_view_container);
+}
+
+static component_t *text_viewer_gui_add_text_view(text_viewer_t *text_viewer, container_t *view_container) {
+  component_t text_view = gui_text_view_create(
+      &text_viewer->gui, text_viewer->multiline_text, 0, 0);
+
+  return gui_one_container_set_component(view_container, text_view);
+}
+
+void text_viewer_start_loop(text_viewer_t *text_viewer) {
+  command_t command_arr[20];
+  commands_t commands =
+      commands_create(command_arr, 20, *text_viewer->pheripherals.knobs);
+  renderer_t renderer = renderer_create(text_viewer->pheripherals.display);
+
+  text_viewer_init_gui(text_viewer, &commands, &renderer);
+
+  // window
+  container_t containers[2];
+  window_t text_viewer_window = gui_window_create(containers, 2);
+
+  // name and line
+  component_t name_and_line_components[2];
+  text_t name_text = {.font = &text_viewer->font,
+                      .line = basename(text_viewer->path),
+                      .color = WHITE_PIXEL};
+  container_t *name_and_line = text_viewer_gui_add_name_and_line(
+      text_viewer, &text_viewer_window, &name_text, name_and_line_components);
+
+  // text viewer
+  container_t *text_view_container = text_viewer_gui_add_view_container(
+      text_viewer, name_and_line, &text_viewer_window);
+  component_t *text_view =
+      text_viewer_gui_add_text_view(text_viewer, text_view_container);
+
+  gui_set_active_window(&text_viewer->gui, &text_viewer_window);
+
+  gui_text_view_register_commands(&text_viewer->gui,
+                                  text_view); // TODO: rethink this design
+
+  text_viewer_register_commands(text_viewer, &commands);
+
+  // main loop
+  text_viewer->running = true;
+  while (text_viewer->running) {
+    commands_check_input(&commands);
+
+    gui_update(&text_viewer->gui);
+    gui_render(&text_viewer->gui);
+  }
+
+  renderer_clear(&renderer);
+  renderer_render(&renderer);
+}