From: Michael Göhler <somebody.here@gmx.de>
Date: Sun, 8 Feb 2015 16:46:42 +0000 (+0100)
Subject: added support for interupting slides line by line, #45, #75
X-Git-Url: https://git.danieliu.xyz/?a=commitdiff_plain;h=680d0478fc66d6d25b1f258be0114d6c915ec0a0;p=smdp.git

added support for interupting slides line by line, #45, #75
---

diff --git a/include/markdown.h b/include/markdown.h
index f38a646..da8805e 100644
--- a/include/markdown.h
+++ b/include/markdown.h
@@ -53,6 +53,7 @@ enum line_bitmask {
     IS_UNORDERED_LIST_3,
     IS_UNORDERED_LIST_EXT,
     IS_CENTER,
+    IS_STOP,
     IS_EMPTY
 };
 
@@ -70,6 +71,7 @@ typedef struct _slide_t {
     struct _slide_t *prev;
     struct _slide_t *next;
     int lines;
+    int stop;
 } slide_t;
 
 typedef struct _deck_t {
diff --git a/src/markdown.c b/src/markdown.c
index 05c77be..dd1ea48 100644
--- a/src/markdown.c
+++ b/src/markdown.c
@@ -43,7 +43,7 @@ slide_t *new_slide() {
     slide_t *x = malloc(sizeof(slide_t));
     x->line = NULL;
     x->prev = x->next = NULL;
-    x->lines = 0;
+    x->lines = x->stop = 0;
     return x;
 }
 
diff --git a/src/parser.c b/src/parser.c
index 59b6b52..5ca7ea2 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -68,6 +68,14 @@ deck_t *markdown_load(FILE *input) {
                 // clear text
                 (text->reset)(text);
 
+            } else if(line && CHECK_BIT(bits, IS_STOP)) {
+
+                // set stop bit on last line
+                SET_BIT(line->bits, IS_STOP);
+
+                // clear text
+                (text->reset)(text);
+
             // if text is markdown hr
             } else if(CHECK_BIT(bits, IS_HR) &&
                       CHECK_BIT(line->bits, IS_EMPTY)) {
@@ -308,6 +316,15 @@ int markdown_analyse(cstring_t *text, int prev) {
     // count leading spaces
     offset = next_nonblank(text, 0);
 
+    // IS_STOP
+    if((offset < CODE_INDENT || !CHECK_BIT(prev, IS_CODE)) &&
+       (!wcsncmp(&text->value[offset], L"<br>", 4) ||
+        !wcsncmp(&text->value[offset], L"<BR>", 4) ||
+        !wcsncmp(&text->value[offset], L"^", 1))) {
+        SET_BIT(bits, IS_STOP);
+        return bits;
+    }
+
     // strip trailing spaces
     for(eol = text->size; eol > offset && iswspace(text->value[eol - 1]); eol--);
 
@@ -381,7 +398,8 @@ int markdown_analyse(cstring_t *text, int prev) {
         // IS_CODE
         if(offset >= CODE_INDENT &&
            (CHECK_BIT(prev, IS_EMPTY) ||
-            CHECK_BIT(prev, IS_CODE))) {
+            CHECK_BIT(prev, IS_CODE)  ||
+            CHECK_BIT(prev, IS_STOP))) {
             SET_BIT(bits, IS_CODE);
 
         } else {
diff --git a/src/viewer.c b/src/viewer.c
index bf8af68..5ca04a5 100644
--- a/src/viewer.c
+++ b/src/viewer.c
@@ -73,6 +73,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
     int max_lines = 0;  // max lines per slide
     int max_cols = 0;   // max columns per line
     int offset;         // text offset
+    int stop = 0;       // passed stop bits per slide
 
     // header line 1 is displayed at the top
     int bar_top = (deck->headers > 0) ? 1 : 0;
@@ -291,21 +292,34 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
         wrefresh(stdscr);
 
         line = slide->line;
-        l = 0;
+        l = stop = 0;
 
         // print lines
         while(line) {
             add_line(content, l, (COLS - max_cols) / 2, line, max_cols, colors);
+
+            // raise stop counter if we pass a line having a stop bit
+            if(CHECK_BIT(line->bits, IS_STOP))
+                stop++;
+
             l += (line->length / COLS) + 1;
             line = line->next;
+
+            // only stop here if we didn't stop here recently
+            if(stop > slide->stop)
+                break;
         }
 
-        int i, ymax;
-        getmaxyx( content, ymax, i );
-        for (i = 0; i < url_get_amount(); i++) {
-            mvwprintw(content, ymax - url_get_amount() - 1 + i, 3,
-                      "[%d] ", i);
-            waddwstr(content, url_get_target(i));
+        // print pandoc URL references
+        // only if we already printed all lines of the current slide
+        if(!line) {
+            int i, ymax;
+            getmaxyx( content, ymax, i );
+            for (i = 0; i < url_get_amount(); i++) {
+                mvwprintw(content, ymax - url_get_amount() - 1 + i, 3,
+                          "[%d] ", i);
+                waddwstr(content, url_get_target(i));
+            }
         }
 
         // make content visible
@@ -326,7 +340,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
         i = 0;
         switch(c) {
 
-            // show previous slide
+            // show previous slide or stop bit
             case KEY_UP:
             case KEY_LEFT:
             case KEY_PPAGE:
@@ -335,15 +349,23 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
             case 263: // BACKSPACE (getty)
             case 'h':
             case 'k':
-                if(slide->prev) {
-                    slide = slide->prev;
-                    sc--;
+                if(stop > 1 || (stop == 1 && !line)) {
+                    // show current slide again
+                    // but stop one stop bit earlier
+                    slide->stop--;
                 } else {
-                    fade = false;
+                    if(slide->prev) {
+                        // show previous slide
+                        slide = slide->prev;
+                        sc--;
+                    } else {
+                        // do nothing
+                        fade = false;
+                    }
                 }
                 break;
 
-            // show next slide
+            // show next slide or stop bit
             case KEY_DOWN:
             case KEY_RIGHT:
             case KEY_NPAGE:
@@ -351,11 +373,19 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa
             case ' ':  // SPACE
             case 'j':
             case 'l':
-                if(slide->next) {
-                    slide = slide->next;
-                    sc++;
+                if(stop && line) {
+                    // show current slide again
+                    // but stop one stop bit later (or at end of slide)
+                    slide->stop++;
                 } else {
-                    fade = false;
+                    if(slide->next) {
+                        // show next slide
+                        slide = slide->next;
+                        sc++;
+                    } else {
+                        // do nothing
+                        fade = false;
+                    }
                 }
                 break;