done but i need to fix many many errors :)))

src/Buffer.cpp

@@ -31,7 +31,7 @@ bool Buffer::open(const string & new_file_name)
 			// Remove any newlines that are in the file.
 			for(auto char_loc = line.find_first_of('\n'); char_loc != -1; char_loc = line.find_first_of('\n'))
 				line.erase(char_loc, 1);
-			
+
 			// Replace break tags with newlines.
 			for(auto char_loc = line.find("<br>"); char_loc != -1; char_loc = line.find("<br>"))
 				line.replace(char_loc, 4, "\n");
@@ -49,7 +49,7 @@ bool Buffer::open(const string & new_file_name)
 				std::string link_name = link_tag.substr(second_space_loc + 1);
 
 				v_links_.push_back({file_name, link_name});
-				
+
 				line.replace(tag_loc, tag_len + 1, "<" + link_name + ">[" + to_string(curr_link) + "]");
 			}
 
@@ -63,7 +63,7 @@ bool Buffer::open(const string & new_file_name)
 
 				// However, if the paragraph is empty, then it shouldn't be added.
 				if(curr_p != "")
-				{	
+				{
 					v_lines_.push_back(curr_p);
 					curr_p = "";
 				}
@@ -79,22 +79,33 @@ bool Buffer::open(const string & new_file_name)
 
     file_name_ = new_file_name;
     ix_top_line_ = 0;
+    v_hist_.push_back(file_name);
+    curr_link_itr = v_hist_.end() - 1;
     return true;
 }
 
 bool go(int & link)
 {
-    string f_name = v_links[link - 1];
-	
+    string f_name = v_links[link].first;
+
     if(!open(f_name))
         return false;
     else
+	v_hist_.push_back(f_name);
+	curr_link_itr = v_hist_.end() - 1;
         return true;
-	
 }
 
-void back()
+bool back()
 {
-	
+	v_hist_.erase(curr_link_itr);
+
+	if(v_hist_.size() == 0)
+		return false;
+
+	curr_link_itr = prev(curr_link_itr);
+	open(*current_link_itr);
+
+	return true;
 }
 

src/Buffer.h

@@ -19,13 +19,15 @@ public:
     void move_to_previous_page();
     int max_links();
     bool go(int & link);
-    back();
+    bool back();
     bool open(const std::string & file_name);
     void set_window_height(int h) { window_height_ = h; }
 
 private:
     std::vector<std::string> v_lines_;
-		std::vector<std::pair<std::string, std::string>> v_links_;
+    std::vector<std::pair<std::string, std::string>> v_links_;
+    std::vector<std::string> v_hist_;
+    auto curr_link_itr = v_hist_.end();
     int ix_top_line_ = 0;
     std::string file_name_;
     int window_height_;
@@ -47,8 +49,7 @@ inline void Buffer::move_to_previous_page()
 
 inline int Buffer::max::links()
 {
-	//return v_links.length();
-	return 1;
+	return v_links_.length();
 }
 
 #endif

src/FileBrowser.cpp

@@ -33,8 +33,9 @@ void FileBrowser::display()
 void FileBrowser::execute_command(char command, bool & done)
 {
     switch (command) {
-        /*case 'b': {
-            buffer_.back();
+        case 'b': {
+           if(!buffer_.back())
+		error_message_ = "No pervious links to open";
             break;
         }
         case 'g': {
@@ -55,7 +56,7 @@ void FileBrowser::execute_command(char command, bool & done)
 		error_message_ = "Could not open link " + link;
 	    } 
             break;
-        }*/
+        }
         case 'n': {
             buffer_.move_to_next_page();
             break;