From d8fcbcd428c47d1de02b2395fc01ada094eeddcd Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sun, 10 Jul 2016 17:24:00 -0400
Subject: [PATCH] render a file's contents

---
 src/gui/Window.cc | 30 +++++++++++++++++++++---------
 src/gui/Window.h  |  5 ++++-
 src/jes.cc        |  8 +++++++-
 3 files changed, 32 insertions(+), 11 deletions(-)

diff --git a/src/gui/Window.cc b/src/gui/Window.cc
index e294f04..4999f63 100644
--- a/src/gui/Window.cc
+++ b/src/gui/Window.cc
@@ -65,7 +65,7 @@ static bool Initialize_OpenGL()
  * @retval true The Window was created successfully.
  * @retval false There was an error while creating the Window.
  */
-bool Window::create()
+bool Window::create(std::shared_ptr<Buffer> buffer)
 {
     if (!Initialize_SDL())
     {
@@ -110,6 +110,8 @@ bool Window::create()
     m_programs.text->set_texture(0);
     m_programs.text->set_color(1.0, 1.0, 1.0, 1.0);
 
+    m_buffer = buffer;
+
     resize();
 
     return true;
@@ -179,16 +181,26 @@ void Window::redraw()
     glClear(GL_COLOR_BUFFER_BIT);
 
     m_programs.text->use();
-    static const char msg[] = "Welcome to " APPNAME " pre-pre-pre-alpha!!";
+
     int advance = m_font.get_advance();
-    int x = 0;
-    int y = m_height - FONT_SIZE;
-    for (int i = 0, len = strlen(msg); i < len; i++)
+    int line_height = m_font.get_line_height();
+    int y = m_height - line_height;
+    for (auto line = m_buffer->cbegin(); line != m_buffer->cend(); line++)
     {
-        m_programs.text->set_position(x, y);
-        auto g = m_font.get_glyph(msg[i]);
-        g->render();
-        x += advance;
+        int x = 0;
+        for (int i = 0, len = (*line)->size(); i < len; i++)
+        {
+            uint8_t c = (**line)[i];
+            auto g = m_font.get_glyph(c);
+            m_programs.text->set_position(x, y);
+            g->render();
+            x += advance;
+        }
+        y -= line_height;
+        if (y + line_height < 0)
+        {
+            break;
+        }
     }
 
     SDL_GL_SwapWindow(m_window);
diff --git a/src/gui/Window.h b/src/gui/Window.h
index 135d4e1..9dd482a 100644
--- a/src/gui/Window.h
+++ b/src/gui/Window.h
@@ -4,11 +4,12 @@
 #include <SDL.h>
 #include "TextProgram.h"
 #include "Font.h"
+#include "Buffer.h"
 
 class Window
 {
 public:
-    bool create();
+    bool create(std::shared_ptr<Buffer> buffer);
     void run_event_loop();
 
 protected:
@@ -26,6 +27,8 @@ protected:
     } m_programs;
 
     Font m_font;
+
+    std::shared_ptr<Buffer> m_buffer;
 };
 
 #endif
diff --git a/src/jes.cc b/src/jes.cc
index a93b649..2160bdc 100644
--- a/src/jes.cc
+++ b/src/jes.cc
@@ -1,13 +1,19 @@
 #include <iostream>
 #include "Window.h"
 #include "Runtime.h"
+#include <memory>
 
 int main(int argc, char * argv[])
 {
     Runtime::init(argv[0], APPNAME);
 
+    std::shared_ptr<Buffer> b = std::make_shared<Buffer>();
+    if (argc > 1)
+    {
+        b->load_from_file(argv[1]);
+    }
     Window w;
-    if (!w.create())
+    if (!w.create(b))
     {
         std::cerr << "Error creating window." << std::endl;
         return 1;