From f92a7609f7b4a6c72a892b16d371528213eca283 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michael=20G=C3=B6hler?= <somebody.here@gmx.de>
Date: Sun, 7 Sep 2014 21:36:36 +0200
Subject: [PATCH] add color to CODE, H1 and H2 fixed CODE positioning fix segv
 for title only slides

---
 include/parser.h |  1 +
 include/viewer.h |  2 +-
 parser.c         |  9 ++++--
 sample.md        |  7 +++--
 viewer.c         | 74 ++++++++++++++++++++++++++++++++++++++++++++----
 5 files changed, 82 insertions(+), 11 deletions(-)

diff --git a/include/parser.h b/include/parser.h
index f7e6847..da63fa1 100644
--- a/include/parser.h
+++ b/include/parser.h
@@ -13,5 +13,6 @@ int is_utf8(char ch);
 int length_utf8(char ch);
 int next_nonblank(cstring_t *text, int i);
 int next_blank(cstring_t *text, int i);
+int next_word(cstring_t *text, int i);
 
 #endif // !defined( PARSER_H )
diff --git a/include/viewer.h b/include/viewer.h
index 6b6d108..52a2296 100644
--- a/include/viewer.h
+++ b/include/viewer.h
@@ -11,7 +11,7 @@
 #define FADE_DELAY 15000 // micro seconds
 
 int ncurses_display(deck_t *deck, int notrans, int nofade);
-void add_line(WINDOW *window, int y, int x, line_t *line);
+void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols);
 void fade_out(WINDOW *window, int trans, int colors);
 void fade_in(WINDOW *window, int trans, int colors);
 
diff --git a/parser.c b/parser.c
index 3b56b5b..3346634 100644
--- a/parser.c
+++ b/parser.c
@@ -81,7 +81,7 @@ deck_t *markdown_load(FILE *input) {
         } else if(c == '\t') {
 
             // expand tab to spaces
-            for (i = 0;  i <= EXPAND_TABS;  i++) {
+            for (i = 0;  i < EXPAND_TABS;  i++) {
                 (text->expand)(text, ' ');
                 l++;
             }
@@ -172,7 +172,8 @@ deck_t *markdown_load(FILE *input) {
 
                 // remove line from linked list
                 line->prev->next = line->next;
-                line->next->prev = line->prev;
+                if(line->next)
+                    line->next->prev = line->prev;
 
                 // set bits on revious line
                 if(CHECK_BIT(line->bits, IS_H1)) {
@@ -369,3 +370,7 @@ int next_blank(cstring_t *text, int i) {
     return i;
 }
 
+int next_word(cstring_t *text, int i) {
+    return next_nonblank(text, next_blank(text, i));
+}
+
diff --git a/sample.md b/sample.md
index e35b9e8..2f83e53 100644
--- a/sample.md
+++ b/sample.md
@@ -22,13 +22,16 @@ This is another test page.
 
 ## Code example
 
-	public static void main() {
+    public static void main() {
+    
+        printf("%s\n", "hello");
     }
 
 Now with different indentation.
 
 	function expand_tab {
-        }
+        printf("%s\n", "hello");
+    }
 
 ***
 
diff --git a/viewer.c b/viewer.c
index a6cf53c..0f5d928 100644
--- a/viewer.c
+++ b/viewer.c
@@ -160,7 +160,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) {
 
         // print lines
         while(line) {
-            add_line(content, l, (COLS - max_cols) / 2, line);
+            add_line(content, l, (COLS - max_cols) / 2, line, max_cols);
             line = line->next;
             l++;
         }
@@ -227,14 +227,76 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) {
     return(0);
 }
 
-void add_line(WINDOW *window, int y, int x, line_t *line) {
+void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols) {
+    int i = 0; // increment
+
     if(line->text->text) {
         int offset = 0; // text offset
         offset = next_nonblank(line->text, 0);
-        // print line to window
-        mvwprintw(window,
-                  y, x,
-                  "%s", &line->text->text[offset]);
+
+        // IS_CODE
+        if(CHECK_BIT(line->bits, IS_CODE)) {
+
+            // set static offset for code
+            offset = CODE_INDENT;
+
+            // reverse color for code blocks
+            wattron(window, A_REVERSE);
+
+            // print whole lines
+            mvwprintw(window,
+                      y, x,
+                      "%s", &line->text->text[offset]);
+
+        // IS_QUOTE
+        } else if(CHECK_BIT(line->bits, IS_QUOTE)) {
+            //TODO replace greater sign with color block
+
+            //FIXME remove dummy print code
+            mvwprintw(window,
+                      y, x,
+                      "%s", &line->text->text[offset]);
+
+        } else {
+
+            // IF_H1 || IF_H2
+            if(CHECK_BIT(line->bits, IS_H1) || CHECK_BIT(line->bits, IS_H2)) {
+
+                // set headline color
+                wattron(window, COLOR_PAIR(CP_BLUE));
+
+                // enable underline for H1
+                if(CHECK_BIT(line->bits, IS_H1))
+                    wattron(window, A_UNDERLINE);
+
+                // skip hashes
+                while(line->text->text[offset] == '#')
+                    offset = next_word(line->text, offset);
+
+                // print whole lines
+                mvwprintw(window,
+                      y, x,
+                      "%s", &line->text->text[offset]);
+
+                wattroff(window, A_UNDERLINE);
+
+            } else {
+                //TODO for each char in line
+                    //TODO if *|_ highlight (maybe use a stack here?)
+                mvwprintw(window,
+                      y, x,
+                      "%s", &line->text->text[offset]);
+            }
+        }
+
+        // fill rest off line with spaces
+        for(i = getcurx(window) - x; i < max_cols; i++)
+            wprintw(window, "%s", " ");
+
+        // reset to default color
+        wattron(window, COLOR_PAIR(CP_WHITE));
+        wattroff(window, A_UNDERLINE);
+        wattroff(window, A_REVERSE);
     }
 }
 
-- 
2.20.1