Added text viewer app (#74)

tactility/src/apps/system/files/files.c

@@ -2,6 +2,7 @@
 
 #include "app.h"
 #include "apps/system/image_viewer/image_viewer.h"
+#include "apps/system/text_viewer/text_viewer.h"
 #include "assets.h"
 #include "check.h"
 #include "file_utils.h"
@@ -41,6 +42,17 @@ static bool is_supported_image_file(const char* filename) {
     return has_file_extension(filename, ".png");
 }
 
+static bool is_supported_text_file(const char* filename) {
+    return has_file_extension(filename, ".txt") ||
+        has_file_extension(filename, ".ini") ||
+        has_file_extension(filename, ".json") ||
+        has_file_extension(filename, ".yaml") ||
+        has_file_extension(filename, ".yml") ||
+        has_file_extension(filename, ".lua") ||
+        has_file_extension(filename, ".js") ||
+        has_file_extension(filename, ".properties");
+}
+
 // region Views
 
 static void update_views(FilesData* data);
@@ -92,6 +104,15 @@ static void view_file(const char* path, const char* filename) {
         Bundle bundle = tt_bundle_alloc();
         tt_bundle_put_string(bundle, IMAGE_VIEWER_FILE_ARGUMENT, processed_filepath);
         loader_start_app("image_viewer", false, bundle);
+    } else if (is_supported_text_file(filename)) {
+        Bundle bundle = tt_bundle_alloc();
+        if (tt_get_platform() == PlatformEsp) {
+            tt_bundle_put_string(bundle, TEXT_VIEWER_FILE_ARGUMENT, processed_filepath);
+        } else {
+            // Remove forward slash, because we need a relative path
+            tt_bundle_put_string(bundle, TEXT_VIEWER_FILE_ARGUMENT, processed_filepath + 1);
+        }
+        loader_start_app("text_viewer", false, bundle);
     } else {
         TT_LOG_W(TAG, "opening files of this type is not supported");
     }

tactility/src/apps/system/image_viewer/image_viewer.c

@@ -36,7 +36,7 @@ const AppManifest image_viewer_app = {
     .id = "image_viewer",
     .name = "Image Viewer",
     .icon = NULL,
-    .type = AppTypeDesktop,
+    .type = AppTypeHidden,
     .on_start = NULL,
     .on_stop = NULL,
     .on_show = &app_show,

tactility/src/apps/system/text_viewer/text_viewer.c

@@ -0,0 +1,40 @@
+#include "text_viewer.h"
+#include "log.h"
+#include "lvgl.h"
+#include "ui/label_utils.h"
+#include "ui/style.h"
+#include "ui/toolbar.h"
+
+#define TAG "text_viewer"
+
+static void app_show(App app, lv_obj_t* parent) {
+    lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
+    tt_toolbar_create_for_app(parent, app);
+
+    lv_obj_t* wrapper = lv_obj_create(parent);
+    lv_obj_set_width(wrapper, LV_PCT(100));
+    lv_obj_set_flex_grow(wrapper, 1);
+    lv_obj_set_flex_flow(wrapper, LV_FLEX_FLOW_COLUMN);
+    tt_lv_obj_set_style_no_padding(wrapper);
+    tt_lv_obj_set_style_bg_invisible(wrapper);
+
+    lv_obj_t* text = lv_label_create(wrapper);
+    lv_obj_align(text, LV_ALIGN_CENTER, 0, 0);
+    Bundle bundle = tt_app_get_parameters(app);
+    if (tt_bundle_has_string(bundle, TEXT_VIEWER_FILE_ARGUMENT)) {
+        const char* filepath = tt_bundle_get_string(bundle, TEXT_VIEWER_FILE_ARGUMENT);
+        TT_LOG_I(TAG, "Opening %s", filepath);
+        tt_lv_label_set_text_file(text, filepath);
+    }
+}
+
+const AppManifest text_viewer_app = {
+    .id = "text_viewer",
+    .name = "Text Viewer",
+    .icon = NULL,
+    .type = AppTypeHidden,
+    .on_start = NULL,
+    .on_stop = NULL,
+    .on_show = &app_show,
+    .on_hide = NULL
+};

tactility/src/apps/system/text_viewer/text_viewer.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define TEXT_VIEWER_FILE_ARGUMENT "file"
+
+#ifdef __cplusplus
+}
+#endif

tactility/src/tactility.c

@@ -39,6 +39,7 @@ extern const AppManifest image_viewer_app;
 extern const AppManifest power_app;
 extern const AppManifest settings_app;
 extern const AppManifest system_info_app;
+extern const AppManifest text_viewer_app;
 extern const AppManifest wifi_connect_app;
 extern const AppManifest wifi_manage_app;
 
@@ -55,6 +56,7 @@ static const AppManifest* const system_apps[] = {
     &image_viewer_app,
     &settings_app,
     &system_info_app,
+    &text_viewer_app,
     &wifi_connect_app,
     &wifi_manage_app,
 #ifdef ESP_PLATFORM

tactility/src/ui/label_utils.c

@@ -0,0 +1,62 @@
+#include "label_utils.h"
+#include <tactility_core.h>
+#include <unistd.h>
+
+#define TAG "tt_lv_label"
+
+static long file_get_size(FILE* file) {
+    long original_offset = ftell(file);
+
+    if (fseek(file, 0, SEEK_END) != 0) {
+        TT_LOG_E(TAG, "fseek failed");
+        return -1;
+    }
+
+    long file_size = ftell(file);
+    if (file_size == -1) {
+        TT_LOG_E(TAG, "Could not get file length");
+        return -1;
+    }
+
+    if (fseek(file, original_offset, SEEK_SET) != 0) {
+        TT_LOG_E(TAG, "fseek Failed");
+        return -1;
+    }
+
+    return file_size;
+}
+
+static char* str_alloc_from_file(const char* filepath) {
+    FILE* file = fopen(filepath, "rb");
+
+    if (file == NULL) {
+        TT_LOG_E(TAG, "Failed to open %s", filepath);
+        return NULL;
+    }
+
+    long content_length = file_get_size(file);
+
+    char* text_buffer = malloc(content_length + 1);
+    if (text_buffer == NULL) {
+        TT_LOG_E(TAG, "Insufficient memory. Failed to allocate %ldl bytes.", content_length);
+        return NULL;
+    }
+
+    int buffer;
+    uint32_t buffer_offset = 0;
+    text_buffer[0] = 0;
+    while ((buffer = fgetc(file)) != EOF && buffer_offset < content_length) {
+        text_buffer[buffer_offset] = (char)buffer;
+        buffer_offset++;
+    }
+    text_buffer[buffer_offset] = 0;
+
+    fclose(file);
+    return text_buffer;
+}
+
+void tt_lv_label_set_text_file(lv_obj_t* label, const char* filepath) {
+    char* text = str_alloc_from_file(filepath);
+    lv_label_set_text(label, text);
+    free(text);
+}

tactility/src/ui/label_utils.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "lvgl.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void tt_lv_label_set_text_file(lv_obj_t* label, const char* filepath);
+
+#ifdef __cplusplus
+}
+#endif