X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=src%2Fviewer.c;h=13ff6f6466eb3f13ea871fa2e2f63e3c3cb22cfb;hb=5f369c826ac0ca4989892b3691f66d0ac73679f3;hp=ee6fc905df3ae364c0e7d59052dfa0a2c0e9fe97;hpb=a1d883fc5b7acbf45fdc80a7806b4d4c21fdcd1f;p=smdp.git

diff --git a/src/viewer.c b/src/viewer.c
index ee6fc90..13ff6f6 100644
--- a/src/viewer.c
+++ b/src/viewer.c
@@ -65,6 +65,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
     int c = 0;          // char
     int i = 0;          // iterate
     int l = 0;          // line number
+    int lc = 0;         // line count
     int sc = 1;         // slide count
     int colors = 0;     // amount of colors supported
     int fade = 0;       // disable color fading by default
@@ -82,41 +83,73 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
     slide_t *slide = deck->slide;
     line_t *line;
 
+    // set locale to display UTF-8 correctly in ncurses
+    setlocale(LC_CTYPE, "");
+
+    // init ncurses
+    initscr();
+
     while(slide) {
-        // set max_lines if line count exceeded
-        max_lines = (slide->lines > max_lines) ? slide->lines : max_lines;
+        lc = 0;
         line = slide->line;
+
         while(line) {
-            // set max_cols if length exceeded
-            max_cols = (line->length > max_cols) ? line->length : max_cols;
+            if(line->length > COLS) {
+                i = line->length;
+                offset = 0;
+                while(i > COLS) {
+
+                    i = prev_blank(line->text, offset + COLS) - offset;
+
+                    // single word is > COLS
+                    if(!i) {
+                        // calculate min_width
+                        i = next_blank(line->text, offset + COLS) - offset;
+
+                        // disable ncurses
+                        endwin();
+
+                        // print error
+                        fprintf(stderr, "Error: Terminal width (%i columns) too small. Need at least %i columns.\n", COLS, i);
+                        fprintf(stderr, "You may need to shorten some lines by inserting line breaks.\n");
+
+                        return 1;
+                    }
+
+                    // set max_cols
+                    max_cols = MAX(i, max_cols);
+
+                    // iterate to next line
+                    offset = prev_blank(line->text, offset + COLS);
+                    i = line->length - offset;
+                    lc++;
+                }
+                // set max_cols one last time
+                max_cols = MAX(i, max_cols);
+            } else {
+                // set max_cols
+                max_cols = MAX(line->length, max_cols);
+            }
+            lc++;
             line = line->next;
         }
-        slide = slide->next;
-    }
 
-    // set locale to display UTF-8 correctly in ncurses
-    setlocale(LC_CTYPE, "");
+        max_lines = MAX(lc, max_lines);
 
-    // init ncurses
-    initscr();
+        slide = slide->next;
+    }
 
-    if((max_cols > COLS) ||
-       (max_lines + bar_top + bar_bottom + 2 > LINES)) {
+    // not enough lines
+    if(max_lines + bar_top + bar_bottom > LINES) {
 
         // disable ncurses
         endwin();
 
         // print error
-        fprintf(stderr, "Error: Terminal size %ix%i too small. Need at least %ix%i.\n",
-            COLS, LINES, max_cols, max_lines + bar_top + bar_bottom + 2);
-
-        // print hint to solve it
-        if(max_lines + bar_top + bar_bottom + 2 > LINES)
-            fprintf(stderr, "You may need to add additional horizontal rules ('***') to split your file in shorter slides.\n");
-        if(max_cols > COLS)
-            fprintf(stderr, "Automatic line wrapping is not supported yet. You may need to shorten some lines by inserting line breaks.\n");
+        fprintf(stderr, "Error: Terminal height (%i lines) too small. Need at least %i lines.\n", LINES, max_lines + bar_top + bar_bottom);
+        fprintf(stderr, "You may need to add additional horizontal rules ('***') to split your file in shorter slides.\n");
 
-        return(1);
+        return 1;
     }
 
     // disable cursor
@@ -161,7 +194,8 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
             init_pair(CP_YELLOW, 208, trans);
 
             // enable color fading
-            if(!nofade) fade = 1;
+            if(!nofade)
+                fade = true;
 
         // 8 color mode
         } else {
@@ -240,8 +274,8 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
         // print lines
         while(line) {
             add_line(content, l, (COLS - max_cols) / 2, line, max_cols, colors);
+            l += (line->length / COLS) + 1;
             line = line->next;
-            l++;
         }
 
         // make content visible
@@ -252,7 +286,8 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
             fade_in(content, trans, colors, invert);
 
         // re-enable fading after any undefined key press
-        if(COLORS == 256 && !nofade) fade = 1;
+        if(COLORS == 256 && !nofade)
+            fade = true;
 
         // wait for user input
         c = getch();
@@ -264,6 +299,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
             // show previous slide
             case KEY_UP:
             case KEY_LEFT:
+            case KEY_PPAGE:
             case 8:   // BACKSPACE (ascii)
             case 127: // BACKSPACE (xterm)
             case 263: // BACKSPACE (getty)
@@ -273,13 +309,14 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
                     slide = slide->prev;
                     sc--;
                 } else {
-                    fade = 0;
+                    fade = false;
                 }
                 break;
 
             // show next slide
             case KEY_DOWN:
             case KEY_RIGHT:
+            case KEY_NPAGE:
             case '\n': // ENTER
             case ' ':  // SPACE
             case 'j':
@@ -288,7 +325,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
                     slide = slide->next;
                     sc++;
                 } else {
-                    fade = 0;
+                    fade = false;
                 }
                 break;
 
@@ -320,7 +357,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
                     }
                 } else {
                     // disable fading if slide n doesn't exist
-                    fade = 0;
+                    fade = false;
                 }
                 break;
 
@@ -343,13 +380,13 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
             // quit
             case 'q':
                 // do not fade out on exit
-                fade = 0;
-                slide = (void*)0;
+                fade = false;
+                slide = NULL;
                 break;
 
             default:
                 // disable fading on undefined key press
-                fade = 0;
+                fade = false;
                 break;
         }
 
@@ -360,68 +397,128 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert) {
 
     endwin();
 
-    return(0);
+    return 0;
 }
 
 void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors) {
-    int i = 0; // increment
-    char *c; // char pointer for iteration
-    char *special = "\\*_`"; // list of interpreted chars
-    cstack_t *stack = cstack_init();
-    
-    if(line->text->text) {
-        int offset = 0; // text offset
-
-        // IS_UNORDERED_LIST_3
-        if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_3)) {
-            offset = next_nonblank(line->text, 0);
-            char format_s[15];
-            strcpy(&format_s[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " |  " : "    ");
-            strcpy(&format_s[4], CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)? " |  " : "    ");
-            strcpy(&format_s[8], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? " +- %s" : " `- %s");
-            mvwprintw(window,
-                      y, x,
-                      format_s,
-                      &line->text->text[offset + 2]);
-
-        // IS_UNORDERED_LIST_2
-        } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)) {
-            offset = next_nonblank(line->text, 0);
-            char format_s[11];
-            strcpy(&format_s[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " |  " : "    ");
-            strcpy(&format_s[4], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? " +- %s" : " `- %s");
-            mvwprintw(window,
-                      y, x,
-                      format_s,
-                      &line->text->text[offset + 2]);
-
-        // IS_UNORDERED_LIST_1
-        } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) {
-            offset = next_nonblank(line->text, 0);
-            char format_s[7];
-            strcpy(&format_s[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? " +- %s" : " `- %s");
-            mvwprintw(window,
-                      y, x,
-                      format_s,
-                      &line->text->text[offset + 2]);
-
-        // IS_CODE
-        } else if(CHECK_BIT(line->bits, IS_CODE)) {
-
-            // set static offset for code
-            offset = CODE_INDENT;
-
-            // reverse color for code blocks
-            if(colors)
-                wattron(window, COLOR_PAIR(CP_BLACK));
-
-            // print whole lines
-            mvwprintw(window,
-                      y, x,
-                      "%s", &line->text->text[offset]);
 
+    if(!line->text->text) {
+        return;
+    }
+
+    int i; // increment
+    int offset = 0; // text offset
+
+    // move the cursor in position
+    wmove(window, y, x);
+
+    // IS_UNORDERED_LIST_3
+    if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_3)) {
+        offset = next_nonblank(line->text, 0);
+        char prompt[13];
+        strcpy(&prompt[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " |  " : "    ");
+        strcpy(&prompt[4], CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)? " |  " : "    ");
+
+        if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+            strcpy(&prompt[8], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? " |  " : "    ");
+        } else {
+            strcpy(&prompt[8], " +- ");
+            offset += 2;
+        }
+
+        wprintw(window,
+                "%s", prompt);
+
+        if(!CHECK_BIT(line->bits, IS_CODE))
+            inline_display(window, &line->text->text[offset], colors);
+
+    // IS_UNORDERED_LIST_2
+    } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)) {
+        offset = next_nonblank(line->text, 0);
+        char prompt[9];
+        strcpy(&prompt[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " |  " : "    ");
+
+        if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+            strcpy(&prompt[4], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? " |  " : "    ");
+        } else {
+            strcpy(&prompt[4], " +- ");
+            offset += 2;
+        }
+
+        wprintw(window,
+                "%s", prompt);
+
+        if(!CHECK_BIT(line->bits, IS_CODE))
+            inline_display(window, &line->text->text[offset], colors);
+
+    // IS_UNORDERED_LIST_1
+    } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) {
+        offset = next_nonblank(line->text, 0);
+        char prompt[5];
+
+        if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+            strcpy(&prompt[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? " |  " : "    ");
+        } else {
+            strcpy(&prompt[0], " +- ");
+            offset += 2;
+        }
+
+        wprintw(window,
+                "%s", prompt);
+
+        if(!CHECK_BIT(line->bits, IS_CODE))
+            inline_display(window, &line->text->text[offset], colors);
+    }
+
+    // IS_CODE
+    if(CHECK_BIT(line->bits, IS_CODE)) {
+
+        // set static offset for code
+        offset = CODE_INDENT;
+
+        // reverse color for code blocks
+        if(colors)
+            wattron(window, COLOR_PAIR(CP_BLACK));
+
+        // print whole lines
+        wprintw(window,
+                "%s", &line->text->text[offset]);
+    }
+
+    if(!CHECK_BIT(line->bits, IS_UNORDERED_LIST_1) &&
+       !CHECK_BIT(line->bits, IS_UNORDERED_LIST_2) &&
+       !CHECK_BIT(line->bits, IS_UNORDERED_LIST_3) &&
+       !CHECK_BIT(line->bits, IS_CODE)) {
+
+        // IS_QUOTE
+        if(CHECK_BIT(line->bits, IS_QUOTE)) {
+            while(line->text->text[offset] == '>') {
+                // print a reverse color block
+                if(colors) {
+                    wattron(window, COLOR_PAIR(CP_BLACK));
+                    wprintw(window, "%s", " ");
+                    wattron(window, COLOR_PAIR(CP_WHITE));
+                    wprintw(window, "%s", " ");
+                } else {
+                    wprintw(window, "%s", ">");
+                }
+
+                // find next quote or break
+                offset++;
+                if(line->text->text[offset] == ' ')
+                    offset = next_word(line->text, offset);
+            }
+
+            inline_display(window, &line->text->text[offset], colors);
         } else {
 
+            // IS_CENTER
+            if(CHECK_BIT(line->bits, IS_CENTER)) {
+                if(line->length < max_cols) {
+                    wmove(window, y, x + ((max_cols - line->length) / 2));
+                }
+            }
+
             // IS_H1 || IS_H2
             if(CHECK_BIT(line->bits, IS_H1) || CHECK_BIT(line->bits, IS_H2)) {
 
@@ -438,144 +535,126 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo
                     offset = next_word(line->text, offset);
 
                 // print whole lines
-                mvwprintw(window,
-                      y, x,
-                      "%s", &line->text->text[offset]);
+                wprintw(window,
+                        "%s", &line->text->text[offset]);
 
                 wattroff(window, A_UNDERLINE);
 
+            // no line-wide markdown
             } else {
-                // move the cursor in position
-                wmove(window, y, x);
-
-                // IS_QUOTE
-                if(CHECK_BIT(line->bits, IS_QUOTE)) {
-                    while(line->text->text[offset] == '>') {
-                        // print a reverse color block
-                        if(colors) {
-                            wattron(window, COLOR_PAIR(CP_BLACK));
-                            wprintw(window, "%s", " ");
-                            wattron(window, COLOR_PAIR(CP_WHITE));
-                            wprintw(window, "%s", " ");
-                        } else {
-                            wprintw(window, "%s", ">");
-                        }
 
-                        // find next quote or break
-                        offset++;
-                        if(line->text->text[offset] == ' ')
-                            offset = next_word(line->text, offset);
-                    }
-                }
+                inline_display(window, &line->text->text[offset], colors);
+            }
+        }
+    }
 
-                // for each char in line
-                c = &line->text->text[offset];
-                while(*c) {
-
-                    // if char is in special char list
-                    if(strchr(special, *c)) {
-
-                        // closing special char (or second backslash)
-                        if((stack->top)(stack, *c)) {
-
-                            switch(*c) {
-                                // print escaped backslash
-                                case '\\':
-                                    wprintw(window, "%c", *c);
-                                    break;
-                                // disable highlight
-                                case '*':
-                                    if(colors)
-                                        wattron(window, COLOR_PAIR(CP_WHITE));
-                                    break;
-                                // disable underline
-                                case '_':
-                                    wattroff(window, A_UNDERLINE);
-                                    break;
-                                // disable inline code
-                                case '`':
-                                    if(colors)
-                                        wattron(window, COLOR_PAIR(CP_WHITE));
-                                    break;
-                            }
+    // fill rest off line with spaces
+    for(i = getcurx(window) - x; i < max_cols; i++)
+        wprintw(window, "%s", " ");
 
-                            // remove top special char from stack
-                            (stack->pop)(stack);
+    // reset to default color
+    if(colors)
+        wattron(window, COLOR_PAIR(CP_WHITE));
+    wattroff(window, A_UNDERLINE);
+}
 
-                        // treat special as regular char
-                        } else if((stack->top)(stack, '\\')) {
-                            wprintw(window, "%c", *c);
+void inline_display(WINDOW *window, const char *c, const int colors) {
+    const static char *special = "\\*_`"; // list of interpreted chars
+    cstack_t *stack = cstack_init();
 
-                            // remove backslash from stack
-                            (stack->pop)(stack);
+    // for each char in line
+    for(; *c; c++) {
 
-                        // opening special char
-                        } else {
-                            switch(*c) {
-                                // enable highlight
-                                case '*':
-                                    if(colors)
-                                        wattron(window, COLOR_PAIR(CP_RED));
-                                    break;
-                                // enable underline
-                                case '_':
-                                    wattron(window, A_UNDERLINE);
-                                    break;
-                                // enable inline code
-                                case '`':
-                                    if(colors)
-                                        wattron(window, COLOR_PAIR(CP_BLACK));
-                                    break;
-                                // do nothing for backslashes
-                            }
-
-                            // push special char to stack
-                            (stack->push)(stack, *c);
-                        }
+        // if char is in special char list
+        if(strchr(special, *c)) {
 
-                    } else {
-                        // remove backslash from stack
-                        if((stack->top)(stack, '\\'))
-                            (stack->pop)(stack);
+            // closing special char (or second backslash)
+            if((stack->top)(stack, *c)) {
 
-                        // print regular char
+                switch(*c) {
+                    // print escaped backslash
+                    case '\\':
                         wprintw(window, "%c", *c);
-                    }
-
-                    c++;
+                        break;
+                    // disable highlight
+                    case '*':
+                        if(colors)
+                            wattron(window, COLOR_PAIR(CP_WHITE));
+                        break;
+                    // disable underline
+                    case '_':
+                        wattroff(window, A_UNDERLINE);
+                        break;
+                    // disable inline code
+                    case '`':
+                        if(colors)
+                            wattron(window, COLOR_PAIR(CP_WHITE));
+                        break;
                 }
 
-                // pop stack until empty to prevent formated trailing spaces
-                while(!(stack->empty)(stack)) {
-                    switch((stack->pop)(stack)) {
-                        // disable highlight
-                        case '*':
-                            if(colors)
-                                wattron(window, COLOR_PAIR(CP_WHITE));
-                            break;
-                        // disable underline
-                        case '_':
-                            wattroff(window, A_UNDERLINE);
-                            break;
-                        // disable inline code
-                        case '`':
-                            if(colors)
-                                wattron(window, COLOR_PAIR(CP_WHITE));
-                            break;
-                        // do nothing for backslashes
-                    }
+                // remove top special char from stack
+                (stack->pop)(stack);
+
+            // treat special as regular char
+            } else if((stack->top)(stack, '\\')) {
+                wprintw(window, "%c", *c);
+
+                // remove backslash from stack
+                (stack->pop)(stack);
+
+            // opening special char
+            } else {
+                switch(*c) {
+                    // enable highlight
+                    case '*':
+                        if(colors)
+                            wattron(window, COLOR_PAIR(CP_RED));
+                        break;
+                    // enable underline
+                    case '_':
+                        wattron(window, A_UNDERLINE);
+                        break;
+                    // enable inline code
+                    case '`':
+                        if(colors)
+                            wattron(window, COLOR_PAIR(CP_BLACK));
+                        break;
+                    // do nothing for backslashes
                 }
+
+                // push special char to stack
+                (stack->push)(stack, *c);
             }
-        }
 
-        // fill rest off line with spaces
-        for(i = getcurx(window) - x; i < max_cols; i++)
-            wprintw(window, "%s", " ");
+        } else {
+            // remove backslash from stack
+            if((stack->top)(stack, '\\'))
+                (stack->pop)(stack);
 
-        // reset to default color
-        if(colors)
-            wattron(window, COLOR_PAIR(CP_WHITE));
-        wattroff(window, A_UNDERLINE);
+            // print regular char
+            wprintw(window, "%c", *c);
+        }
+    }
+
+    // pop stack until empty to prevent formated trailing spaces
+    while(!(stack->empty)(stack)) {
+        switch((stack->pop)(stack)) {
+            // disable highlight
+            case '*':
+                if(colors)
+                    wattron(window, COLOR_PAIR(CP_WHITE));
+                break;
+            // disable underline
+            case '_':
+                wattroff(window, A_UNDERLINE);
+                break;
+            // disable inline code
+            case '`':
+                if(colors)
+                    wattron(window, COLOR_PAIR(CP_WHITE));
+                break;
+            // do nothing for backslashes
+        }
     }
 
     (stack->delete)(stack);