Added reading storage for text and current position, ability to copy from SD Card.

components/epaper/EPD.c

@@ -1749,6 +1749,13 @@ void EPD_clearStringRect(int x, int y, char *str)
 	EPD_fillRect(x+dispWin.x1, y+dispWin.y1, w, h, _bg);
 }
 
+void EPD_frameStringRect(int x, int y, char *str)
+{
+	int w = EPD_getStringWidth(str);
+	int h = EPD_getfontheight();
+	EPD_drawRect(x+dispWin.x1, y+dispWin.y1, w, h, _fg);
+}
+
 //==============================================================================
 /**
  * bit-encoded bar position of all digits' bcd segments

components/epaper/EPD.h

@@ -529,6 +529,10 @@ int EPD_getStringWidth(char* str);
  */
 void EPD_clearStringRect(int x, int y, char *str);
 
+/*
+ * Frames the rectangle occupied by string with current foreground color
+ */
+void EPD_frameStringRect(int x, int y, char *str);
 
 /*
  * Compile font c source file to .fnt file

main/CMakeLists.txt

@@ -1,5 +1,5 @@
 FILE(GLOB_RECURSE app_sources *.cpp *.c)
-set(COMPONENT_SRCS "${app_sources} main.cpp")
+set(COMPONENT_SRCS "${app_sources}" "main.cpp")
 set(COMPONENT_ADD_INCLUDEDIRS "." "../components/")
 
 register_component()

main/core/display.c

@@ -111,3 +111,11 @@ void display_sleep()
 {
     EPD_PowerOff();
 }
+
+void display_alert(char* text)
+{
+    EPD_clearStringRect(CENTER, CENTER, text);
+    EPD_print(text, CENTER, CENTER);
+    EPD_frameStringRect(CENTER, CENTER, text);
+    EPD_UpdateScreen();
+}

main/core/display.h

@@ -14,6 +14,8 @@ void display_update();
 void display_wake();
 void display_sleep();
 
+void display_alert(char* text);
+
 #ifdef __cplusplus
 }
 #endif

main/main.cpp

@@ -6,8 +6,6 @@
 #include <string.h>
 #include "esp_system.h"
 #include "driver/gpio.h"
-#include "esp_system.h"
-#include "esp_heap_alloc_caps.h"
 
 #include "esp_log.h"
 static const char *TAG = "main";

main/modes/InternalMemoryMenuMode.cpp

@@ -1,7 +1,9 @@
+#include <string.h>
 #include "core/common.h"
 #include "core/buttons.h"
 #include "core/display.h"
 #include <epaper/EPD.h>
+#include "reader/reader_storage.h"
 #include "InternalMemoryMenuMode.h"
 
 void InternalMemoryMenuMode::start()
@@ -18,14 +20,25 @@ void InternalMemoryMenuMode::loop()
     EPD_print("Internal Memory", CENTER, 00);
 
     EPD_setFont(DEJAVU18_FONT, NULL);
-    EPD_print("Current File:", 5, 30);
+    // TODO: free memory?
-    EPD_print("/spiffs/book.txt", 20, 50);
 
-    EPD_print("Size:", 5, 80);
+    EPD_print("Size:", 5, 40);
-    EPD_print("1234 kB", 100, 80);
+    long length = reader_storage_get_length();
+    if (length < 0) {
+        strcpy(text, "unknown");
+    } else {
+        sprintf(text, "%ld kB", length / 1024);
+    }
+    EPD_print(text, 100, 40);
 
-    EPD_print("Position:", 5, 100);
+    EPD_print("Position:", 5, 70);
-    EPD_print("45%", 100, 100);
+    long position = reader_storage_get_position();
+    if (position < 0) {
+        strcpy(text, "unknown");
+    } else {
+        sprintf(text, "%d%%", (int)(position * 100 / length));
+    }
+    EPD_print(text, 100, 70);
     display_update();
 
     while (1) {

main/modes/ReaderMode.cpp

@@ -2,6 +2,7 @@
 #include "string.h"
 #include "core/buttons.h"
 #include "core/display.h"
+#include "reader/reader_storage.h"
 #include "ReaderMode.h"
 
 #include "esp_log.h"
@@ -11,7 +12,20 @@ static const char *TAG = "ReaderMode";
 
 void ReaderMode::start()
 {
-    this->textReader = textStorage.open("/sdcard/book.txt");
+    char filename[64];
+    reader_storage_get_filename(filename, sizeof(filename));
+    this->textReader = textStorage.open(filename);
+    
+    this->bookmark_max = reader_storage_get_length();
+    this->bookmark = reader_storage_get_position();
+    if (this->bookmark_max < 0) {
+        this->bookmark_max = 0;
+    }
+    if (this->bookmark < 0 || this->bookmark > this->bookmark_max) {
+        this->bookmark = 0;
+    }
+    ESP_LOGI(TAG, "Opening %s for reading at %ld / %ld.",
+        filename, bookmark, bookmark_max);
 }
 
 void ReaderMode::loop()
@@ -42,7 +56,11 @@ void ReaderMode::loop()
     }
 
     display_clear();
-    pagePrinter.print(pageCurrent);
+    if (bookmark == bookmark_max) {
+        display_alert("THE END");
+    } else {
+        pagePrinter.print(pageCurrent);
+    }
     display_update();
 
     //time_t idleStart = clock();
@@ -57,7 +75,10 @@ void ReaderMode::loop()
             ESP_LOGI(TAG, "Turn page PLUS.");
             if (pageCurrent != NULL) {
                 bookmark = pageCurrent->start + pageCurrent->len;
-                // TODO: limit bookmark to file size
+                if (bookmark > bookmark_max) {
+                    bookmark = bookmark_max;
+                }
+                reader_storage_set_position(bookmark);
                 typesetter.destroyPage(pageLast);
                 pageLast = pageCurrent;
                 pageCurrent = NULL;
@@ -70,6 +91,7 @@ void ReaderMode::loop()
             ESP_LOGI(TAG, "Turn page MINUS.");
             if (pageLast != NULL) {
                 bookmark = pageLast->start;
+                reader_storage_set_position(bookmark);
                 typesetter.destroyPage(pageCurrent);
                 pageCurrent = pageLast;
                 pageLast = NULL;

main/modes/ReaderMode.h

@@ -12,6 +12,7 @@ public:
 
 private:
     long bookmark = 0;
+    long bookmark_max = 0;
     Typesetter typesetter;
     PagePrinter pagePrinter;
     TextStorage textStorage;

main/modes/SdCardMenuMode.cpp

@@ -8,11 +8,14 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include "reader/reader_storage.h"
 #include "SdCardMenuMode.h"
 
 #include "esp_log.h"
 static char* TAG = "SdCardMenuMode";
 
+#define SDCARD_BASEDIR "/sdcard/"
+
 // TODO: make use of bytes
 
 void SdCardMenuMode::start()
@@ -104,7 +107,15 @@ void SdCardMenuMode::onOptionSelected(int option)
         this->setFinished();
         return;
     }
-    // TODO files
+
+    // TODO: spawn a copy AppMode
+    display_alert("Copying into internal memory...");
+    char source[64];
+    strcpy(source, SDCARD_BASEDIR);
+    strcat(source, this->options[option]);
+    reader_storage_store_file(source);
+    reader_storage_set_position(0);
+    this->setFinished();
 }
 
 int SdCardMenuMode::getOptionsX()

main/modes/reader/TextReader.cpp

@@ -31,13 +31,6 @@ size_t TextReader::read(long pos, char* text, size_t len)
     } else {
         fseek(this->f, pos, SEEK_SET);
         size_t read = fread(text, 1, len, this->f);
-        if (read > 0) {
-            //ESP_LOGI(TAG, "Read content: %s", text);
-        } else {
-            ESP_LOGI(TAG, "End of file. Closing.");
-            fclose(this->f);
-            this->f = NULL;
-        }
         return read;
     }
 }

main/modes/reader/TextStorage.cpp

@@ -8,7 +8,7 @@ TextStorage::TextStorage()
 
 TextReader* TextStorage::open(char* filename)
 {
-    FILE* f = fopen("/sdcard/book.txt", "r");
+    FILE* f = fopen(filename, "r");
     if (f == NULL) {
         ESP_LOGE(TAG, "File could not be opened");
         return NULL;

main/modes/reader/reader_storage.c

@@ -0,0 +1,135 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "esp_system.h"
+#include "spiffs/spiffs_vfs.h"
+
+#include "esp_log.h"
+static const char *TAG = "reader_storage";
+
+static const char* filename_stored = "stored.dat";
+static const char* filename_position = "position.dat";
+
+static int check_storage_ready()
+{
+    if (spiffs_is_mounted == 0) {
+        ESP_LOGE(TAG, "Reader storage is not mounted.");
+    }
+    return spiffs_is_mounted;
+}
+
+void reader_storage_get_filename(char* buf, int len)
+{
+    if (check_storage_ready() == 0) {
+        return;
+    }
+
+    strcpy(buf, SPIFFS_BASE_PATH);
+    strcat(buf, "/");
+    strcat(buf, filename_stored);
+}
+
+long reader_storage_get_length()
+{
+    if (check_storage_ready() == 0) {
+        return -1;
+    }
+
+    char path[64];
+    reader_storage_get_filename(path, sizeof(path));
+
+    long length = -1;
+    struct stat stats;
+    if (stat(path, &stats) == 0) {
+        length = stats.st_size;
+    }
+
+    ESP_LOGI(TAG, "Getting length: %ld", length);
+    return length;
+}
+
+void reader_storage_store_file(char* source_path)
+{
+    if (check_storage_ready() == 0) {
+        return;
+    }
+
+    char dest_path[64];
+    reader_storage_get_filename(dest_path, sizeof(dest_path));
+
+    ESP_LOGI(TAG, "Storing file %s into %s", source_path, dest_path);
+    
+    FILE* src = fopen(source_path, "r");
+    if (src == NULL) {
+        ESP_LOGE(TAG, "Failed opening source file.");
+        return;
+    }
+    FILE* dst = fopen(dest_path, "w");
+    if (dst == NULL) {
+        ESP_LOGE(TAG, "Failed opening destination file.");
+        return;
+    }
+    
+    char buf[32];
+    int len = 0;
+    do {
+        len = fread(buf, 1, sizeof(buf), src);
+        if (len > 0) {
+            len = fwrite(buf, 1, sizeof(buf), dst);
+        }
+    } while (len > 0);
+    fclose(dst);
+    fclose(src);
+    ESP_LOGI(TAG, "File stored.");
+}
+
+long reader_storage_get_position()
+{
+    if (check_storage_ready() == 0) {
+        return -1;
+    }
+
+    long position = 0;
+    char* path[64];
+    strcpy(path, SPIFFS_BASE_PATH);
+    strcat(path, "/");
+    strcat(path, filename_position);
+    FILE* f = fopen(path, "r");
+    if (f == NULL) {
+        ESP_LOGE(TAG, "Failed opening position file for reading.");
+        return;
+    }
+    if (fread(&position, sizeof(position), 1, f) != 1) {
+        ESP_LOGE(TAG, "Failed reading position.");
+        position = -1;
+    }
+    fclose(f);
+    ESP_LOGI(TAG, "Getting position: %ld", position);
+    return position;
+}
+
+void reader_storage_set_position(long position)
+{
+    if (check_storage_ready() == 0) {
+        return;
+    }
+
+    ESP_LOGI(TAG, "Setting position: %ld", position);
+
+    char* path[64];
+    strcpy(path, SPIFFS_BASE_PATH);
+    strcat(path, "/");
+    strcat(path, filename_position);
+    FILE* f = fopen(path, "w");
+    if (f == NULL) {
+        ESP_LOGE(TAG, "Failed opening position file for writing.");
+        return;
+    }
+    if (fwrite(&position, sizeof(position), 1, f) != 1) {
+        ESP_LOGE(TAG, "Failed writing position.");
+    }
+    fclose(f);
+}

main/modes/reader/reader_storage.h

@@ -0,0 +1,14 @@
+#include <stdlib.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void reader_storage_get_filename(char* buf, int len);
+long reader_storage_get_length();
+void reader_storage_store_file(char* source_path);
+long reader_storage_get_position();
+void reader_storage_set_position(long position);
+
+#ifdef __cplusplus
+}
+#endif