move base pack here

LICENSE

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+MIT License
+
+Copyright (c) 2022 Roman Shchekin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# flipper-zero-text-viewer
+
+Text Viewer application for Flipper Zero!
+
+A fork with a few changes from [QTRoS' hex viewer](https://github.com/QtRoS/flipper-zero-hex-viewer) to just display text without any hex byte representation
+
+![Text Viewer app!](https://github.com/kyhwana/flipper-zero-hex-viewer/blob/master/textviewerflipper.PNG?raw=true)
+
+[Link to FAP](https://github.com/kyhwana/latest_flipper_zero_apps/raw/main/text_viewer.fap)

application.fam

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+App(
+    appid="text_viewer",
+    name="Text Viewer",
+    apptype=FlipperAppType.EXTERNAL,
+    entry_point="text_viewer_app",
+    requires=[
+        "gui",
+        "dialogs",
+    ],
+    stack_size=2 * 1024,
+    order=20,
+    fap_icon="icons/text_10px.png",
+    fap_category="Tools",
+    fap_icon_assets="icons",
+    fap_author="@kowalski7cc & @kyhwana",
+    fap_version="1.0",
+    fap_description="Text viewer application",
+)

text_viewer.c

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+#include <furi.h>
+#include <furi_hal.h>
+
+#include <text_viewer_icons.h>
+#include <gui/gui.h>
+#include <gui/elements.h>
+#include <dialogs/dialogs.h>
+
+#include <storage/storage.h>
+#include <stream/stream.h>
+#include <stream/buffered_file_stream.h>
+#include <toolbox/stream/file_stream.h>
+
+#define TAG "TextViewer"
+
+#define TEXT_VIEWER_APP_PATH_FOLDER ANY_PATH("")
+#define TEXT_VIEWER_APP_EXTENSION "*"
+
+#define TEXT_VIEWER_BYTES_PER_LINE 20u
+#define TEXT_VIEWER_LINES_ON_SCREEN 5u
+#define TEXT_VIEWER_BUF_SIZE (TEXT_VIEWER_LINES_ON_SCREEN * TEXT_VIEWER_BYTES_PER_LINE)
+
+typedef struct {
+    uint8_t file_bytes[TEXT_VIEWER_LINES_ON_SCREEN][TEXT_VIEWER_BYTES_PER_LINE];
+    uint32_t file_offset;
+    uint32_t file_read_bytes;
+    uint32_t file_size;
+    Stream* stream;
+    bool mode; // Print address or content
+} TextViewerModel;
+
+typedef struct {
+    TextViewerModel* model;
+    FuriMutex** mutex;
+
+    FuriMessageQueue* input_queue;
+
+    ViewPort* view_port;
+    Gui* gui;
+    Storage* storage;
+} TextViewer;
+
+static void render_callback(Canvas* canvas, void* ctx) {
+    TextViewer* text_viewer = ctx;
+    furi_check(furi_mutex_acquire(text_viewer->mutex, FuriWaitForever) == FuriStatusOk);
+
+    canvas_clear(canvas);
+    canvas_set_color(canvas, ColorBlack);
+
+    //elements_button_left(canvas, text_viewer->model->mode ? "Addr" : "Text");
+    text_viewer->model->mode = 1; //text mode
+    //elements_button_right(canvas, "Info");
+
+    int ROW_HEIGHT = 12;
+    int TOP_OFFSET = 10;
+    int LEFT_OFFSET = 3;
+
+    uint32_t line_count = text_viewer->model->file_size / TEXT_VIEWER_BYTES_PER_LINE;
+    if(text_viewer->model->file_size % TEXT_VIEWER_BYTES_PER_LINE != 0) line_count += 1;
+    uint32_t first_line_on_screen = text_viewer->model->file_offset / TEXT_VIEWER_BYTES_PER_LINE;
+    if(line_count > TEXT_VIEWER_LINES_ON_SCREEN) {
+        uint8_t width = canvas_width(canvas);
+        elements_scrollbar_pos(
+            canvas,
+            width,
+            0,
+            ROW_HEIGHT * TEXT_VIEWER_LINES_ON_SCREEN,
+            first_line_on_screen, // TODO
+            line_count - (TEXT_VIEWER_LINES_ON_SCREEN - 1));
+    }
+
+    char temp_buf[32];
+    uint32_t row_iters = text_viewer->model->file_read_bytes / TEXT_VIEWER_BYTES_PER_LINE;
+    if(text_viewer->model->file_read_bytes % TEXT_VIEWER_BYTES_PER_LINE != 0) row_iters += 1;
+
+    for(uint32_t i = 0; i < row_iters; ++i) {
+        uint32_t bytes_left_per_row =
+            text_viewer->model->file_read_bytes - i * TEXT_VIEWER_BYTES_PER_LINE;
+        bytes_left_per_row = MIN(bytes_left_per_row, TEXT_VIEWER_BYTES_PER_LINE);
+
+        if(text_viewer->model->mode) {
+            memcpy(temp_buf, text_viewer->model->file_bytes[i], bytes_left_per_row);
+            temp_buf[bytes_left_per_row] = '\0';
+            for(uint32_t j = 0; j < bytes_left_per_row; ++j)
+                if(!isprint((int)temp_buf[j])) temp_buf[j] = ' ';
+
+            canvas_set_font(canvas, FontKeyboard);
+            canvas_draw_str(canvas, LEFT_OFFSET, TOP_OFFSET + i * ROW_HEIGHT, temp_buf);
+        } else {
+            uint32_t addr = text_viewer->model->file_offset + i * TEXT_VIEWER_BYTES_PER_LINE;
+            snprintf(temp_buf, 32, "%04lX", addr);
+
+            canvas_set_font(canvas, FontKeyboard);
+            canvas_draw_str(canvas, LEFT_OFFSET, TOP_OFFSET + i * ROW_HEIGHT, temp_buf);
+        }
+    }
+
+    furi_mutex_release(text_viewer->mutex);
+}
+
+static void input_callback(InputEvent* input_event, void* ctx) {
+    TextViewer* text_viewer = ctx;
+    if(input_event->type == InputTypeShort || input_event->type == InputTypeRepeat) {
+        furi_message_queue_put(text_viewer->input_queue, input_event, 0);
+    }
+}
+
+static TextViewer* text_viewer_alloc() {
+    TextViewer* instance = malloc(sizeof(TextViewer));
+
+    instance->model = malloc(sizeof(TextViewerModel));
+    memset(instance->model, 0x0, sizeof(TextViewerModel));
+
+    instance->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
+
+    instance->input_queue = furi_message_queue_alloc(8, sizeof(InputEvent));
+
+    instance->view_port = view_port_alloc();
+    view_port_draw_callback_set(instance->view_port, render_callback, instance);
+    view_port_input_callback_set(instance->view_port, input_callback, instance);
+
+    instance->gui = furi_record_open(RECORD_GUI);
+    gui_add_view_port(instance->gui, instance->view_port, GuiLayerFullscreen);
+
+    instance->storage = furi_record_open(RECORD_STORAGE);
+
+    return instance;
+}
+
+static void text_viewer_free(TextViewer* instance) {
+    furi_record_close(RECORD_STORAGE);
+
+    gui_remove_view_port(instance->gui, instance->view_port);
+    furi_record_close(RECORD_GUI);
+    view_port_free(instance->view_port);
+
+    furi_message_queue_free(instance->input_queue);
+
+    furi_mutex_free(instance->mutex);
+
+    if(instance->model->stream) buffered_file_stream_close(instance->model->stream);
+
+    free(instance->model);
+    free(instance);
+}
+
+static bool text_viewer_open_file(TextViewer* text_viewer, const char* file_path) {
+    furi_assert(text_viewer);
+    furi_assert(file_path);
+
+    text_viewer->model->stream = buffered_file_stream_alloc(text_viewer->storage);
+    bool isOk = true;
+
+    do {
+        if(!buffered_file_stream_open(
+               text_viewer->model->stream, file_path, FSAM_READ, FSOM_OPEN_EXISTING)) {
+            FURI_LOG_E(TAG, "Unable to open stream: %s", file_path);
+            isOk = false;
+            break;
+        };
+
+        text_viewer->model->file_size = stream_size(text_viewer->model->stream);
+    } while(false);
+
+    return isOk;
+}
+
+static bool text_viewer_read_file(TextViewer* text_viewer) {
+    furi_assert(text_viewer);
+    furi_assert(text_viewer->model->stream);
+    furi_assert(text_viewer->model->file_offset % TEXT_VIEWER_BYTES_PER_LINE == 0);
+
+    memset(text_viewer->model->file_bytes, 0x0, TEXT_VIEWER_BUF_SIZE);
+    bool isOk = true;
+
+    do {
+        uint32_t offset = text_viewer->model->file_offset;
+        if(!stream_seek(text_viewer->model->stream, offset, true)) {
+            FURI_LOG_E(TAG, "Unable to seek stream");
+            isOk = false;
+            break;
+        }
+
+        text_viewer->model->file_read_bytes = stream_read(
+            text_viewer->model->stream,
+            (uint8_t*)text_viewer->model->file_bytes,
+            TEXT_VIEWER_BUF_SIZE);
+    } while(false);
+
+    return isOk;
+}
+
+int32_t text_viewer_app(void* p) {
+    TextViewer* text_viewer = text_viewer_alloc();
+
+    FuriString* file_path;
+    file_path = furi_string_alloc();
+
+    do {
+        if(p && strlen(p)) {
+            furi_string_set(file_path, (const char*)p);
+        } else {
+            furi_string_set(file_path, TEXT_VIEWER_APP_PATH_FOLDER);
+
+            DialogsFileBrowserOptions browser_options;
+            dialog_file_browser_set_basic_options(
+                &browser_options, TEXT_VIEWER_APP_EXTENSION, &I_text_10px);
+            browser_options.hide_ext = false;
+
+            DialogsApp* dialogs = furi_record_open(RECORD_DIALOGS);
+            bool res = dialog_file_browser_show(dialogs, file_path, file_path, &browser_options);
+
+            furi_record_close(RECORD_DIALOGS);
+            if(!res) {
+                FURI_LOG_I(TAG, "No file selected");
+                break;
+            }
+        }
+
+        FURI_LOG_I(TAG, "File selected: %s", furi_string_get_cstr(file_path));
+
+        if(!text_viewer_open_file(text_viewer, furi_string_get_cstr(file_path))) break;
+        text_viewer_read_file(text_viewer);
+
+        InputEvent input;
+        while(1) {
+            if(furi_message_queue_get(text_viewer->input_queue, &input, 100) == FuriStatusOk) {
+                if(input.key == InputKeyBack) {
+                    break;
+                } else if(input.key == InputKeyUp) {
+                    furi_check(
+                        furi_mutex_acquire(text_viewer->mutex, FuriWaitForever) == FuriStatusOk);
+                    if(text_viewer->model->file_offset > 0) {
+                        text_viewer->model->file_offset -= TEXT_VIEWER_BYTES_PER_LINE;
+                        if(!text_viewer_read_file(text_viewer)) break;
+                    }
+                    furi_mutex_release(text_viewer->mutex);
+                } else if(input.key == InputKeyDown) {
+                    furi_check(
+                        furi_mutex_acquire(text_viewer->mutex, FuriWaitForever) == FuriStatusOk);
+                    uint32_t last_byte_on_screen =
+                        text_viewer->model->file_offset + text_viewer->model->file_read_bytes;
+
+                    if(text_viewer->model->file_size > last_byte_on_screen) {
+                        text_viewer->model->file_offset += TEXT_VIEWER_BYTES_PER_LINE;
+                        if(!text_viewer_read_file(text_viewer)) break;
+                    }
+                    furi_mutex_release(text_viewer->mutex);
+                } else if(input.key == InputKeyLeft) {
+                    furi_check(
+                        furi_mutex_acquire(text_viewer->mutex, FuriWaitForever) == FuriStatusOk);
+                    text_viewer->model->mode = !text_viewer->model->mode;
+                    furi_mutex_release(text_viewer->mutex);
+                } else if(input.key == InputKeyRight) {
+                    FuriString* buffer;
+                    buffer = furi_string_alloc();
+                    furi_string_printf(
+                        buffer,
+                        "File path: %s\nFile size: %lu (0x%lX)",
+                        furi_string_get_cstr(file_path),
+                        text_viewer->model->file_size,
+                        text_viewer->model->file_size);
+
+                    DialogsApp* dialogs = furi_record_open(RECORD_DIALOGS);
+                    DialogMessage* message = dialog_message_alloc();
+                    dialog_message_set_header(
+                        message, "Text Viewer v1.1", 16, 2, AlignLeft, AlignTop);
+                    dialog_message_set_icon(message, &I_text_10px, 3, 2);
+                    dialog_message_set_text(
+                        message, furi_string_get_cstr(buffer), 3, 16, AlignLeft, AlignTop);
+                    dialog_message_set_buttons(message, NULL, NULL, "Back");
+                    dialog_message_show(dialogs, message);
+
+                    furi_string_free(buffer);
+                    dialog_message_free(message);
+                    furi_record_close(RECORD_DIALOGS);
+                }
+            }
+            view_port_update(text_viewer->view_port);
+        }
+    } while(false);
+
+    furi_string_free(file_path);
+    text_viewer_free(text_viewer);
+
+    return 0;
+}