added some notifications to alert user to errors.

.gitignore

@@ -8,4 +8,8 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+# I used Dracula for my test book so I had to remove the files associated with testing.
 *.epub
+Dracula_*
+

Dracula_bookmark

@@ -1 +0,0 @@
-4

Dracula_next

@@ -1 +0,0 @@
-1

src/main.rs

@@ -13,10 +13,7 @@ use cursive::Cursive;
 use cursive::view::Scrollable;
 use epub::doc::EpubDoc; //library for navigating epubs
 use std::*;
-use std::i32;
 use std::path::Path;
-use std::fs::File;
-use std::io::prelude::*;
 use std::str;
 
 /*
@@ -61,10 +58,8 @@ fn main() {
         Closing program.");
     }
     else {
-        let args: Vec<String> = env::args().collect();
-        let filename = &args[1];
 
-        screen_func(filename);
+        screen_func();
     }
 }
 
@@ -75,7 +70,7 @@ function: screen_func
 Params: string
 Return type: none
  */
-fn screen_func(epub_file: &str){
+fn screen_func(){
     
 
     let mut siv = cursive::default();
@@ -197,12 +192,26 @@ fn get_last_text(s: &mut Cursive) {
 
 
 
-        page_num = page_num - 1;
-        doc.set_current_page(page_num);
-        let content = doc.get_current_str();
-        let str_content = content.unwrap();
-        let text = html_module::main(str_content.0);
-        let number_title = page_num;
+
+
+        if page_num == 1{
+            s.add_layer(Dialog::around(TextView::new("Already on first page!"))
+            .button("ok", |s| {s.pop_layer();})
+            );
+            page_num = 0;
+            let page_string = page_num.to_string();
+
+            //writes where the next page is so that Rust knows where to go
+            fs::write(next_page, page_string.as_bytes()).expect("Unable to write file");
+            get_text(s);
+        }
+        else{
+            page_num = page_num - 1;
+            doc.set_current_page(page_num);
+            let content = doc.get_current_str();
+            let str_content = content.unwrap();
+            let text = html_module::main(str_content.0);
+            let number_title = page_num;
 
 
 
@@ -220,7 +229,8 @@ fn get_last_text(s: &mut Cursive) {
             .button("next", |s| {get_text(s);})
             .scrollable()
             .scroll_x(true),
-    );
+        );
+        }
     }
 
     else{
@@ -230,9 +240,6 @@ fn get_last_text(s: &mut Cursive) {
 
 }
 
-
-
-
 /*
     Loads basic config files for ebook. Checks if there is a bookmark, and if not, displays what it sees and passes along
     to the appropriate function.
@@ -257,7 +264,7 @@ fn get_init_text(s: &mut Cursive) {
         let starting_page = fs::read_to_string(bookmark_file_name.clone()).expect("no file found!");
 
 
-        let mut page_num: usize = starting_page
+        let page_num: usize = starting_page
             .trim()
             .parse()
             .expect("not a number");// converts from string to usize
@@ -300,17 +307,23 @@ fn get_init_text(s: &mut Cursive) {
 
 
 fn bookmark_func(s: &mut Cursive, page_num: usize, bookmark: &str){
+
     if page_num != 1{
-    let mut new_page_num = page_num;
+    let new_page_num = page_num;
     //new_page_num = new_page_num - 1;
     let page_string = new_page_num.to_string();
     fs::write(bookmark, page_string.as_bytes()).expect("Unable to write file");
 
+
     }
     else{
         let page_num = "1";
         fs::write(bookmark, page_num.as_bytes()).expect("Unable to write file");
     }
+
+    s.add_layer(Dialog::around(TextView::new("Bookmark placed!"))
+        .button("ok", |s| {s.pop_layer();})
+    )
     }