cleanup. refactored dirt-related function.

[st.git] / st.c

diff --git a/st.c b/st.c
index e6a5e4e..4dc1c5a 100644 (file)
--- a/st.c
+++ b/st.c
@@ -66,17 +66,61 @@
 #define X2COL(x) (((x) - BORDER)/xw.cw)
 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
 
-/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
-enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
-enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
-       CURSOR_SAVE, CURSOR_LOAD };
-enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
-enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
-enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
-       MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
-enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
-enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
+enum glyph_attribute {
+       ATTR_NULL      = 0,
+       ATTR_REVERSE   = 1,
+       ATTR_UNDERLINE = 2,
+       ATTR_BOLD      = 4,
+       ATTR_GFX       = 8,
+};
+
+enum cursor_movement {
+       CURSOR_UP,
+       CURSOR_DOWN,
+       CURSOR_LEFT,
+       CURSOR_RIGHT,
+       CURSOR_SAVE,
+       CURSOR_LOAD
+};
+
+enum cursor_state {
+       CURSOR_DEFAULT  = 0,
+       CURSOR_HIDE     = 1,
+       CURSOR_WRAPNEXT = 2
+};
+
+enum glyph_state {
+       GLYPH_SET   = 1,
+       GLYPH_DIRTY = 2
+};
 
+enum term_mode {
+       MODE_WRAP        = 1,
+       MODE_INSERT      = 2,
+       MODE_APPKEYPAD   = 4,
+       MODE_ALTSCREEN   = 8,
+       MODE_CRLF        = 16,
+       MODE_MOUSEBTN    = 32,
+       MODE_MOUSEMOTION = 64,
+       MODE_MOUSE       = 32|64,
+       MODE_REVERSE     = 128
+};
+
+enum escape_state {
+       ESC_START      = 1,
+       ESC_CSI        = 2,
+       ESC_OSC        = 4,
+       ESC_TITLE      = 8,
+       ESC_ALTCHARSET = 16
+};
+
+enum window_state {
+       WIN_VISIBLE = 1,
+       WIN_REDRAW  = 2,
+       WIN_FOCUSED = 4
+};
+
+/* bit macro */
 #undef B0
 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
 
@@ -215,6 +259,7 @@ static void tsetattr(int*, int);
 static void tsetchar(char*);
 static void tsetscroll(int, int);
 static void tswapscreen(void);
+static void tsetdirt(int, int);
 static void tfulldirt(void);
 
 static void ttynew(void);
@@ -402,8 +447,8 @@ utf8size(char *s) {
 
 void
 selinit(void) {
-       sel.tclick1.tv_sec = 0;
-       sel.tclick1.tv_usec = 0;
+       memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+       memset(&sel.tclick2, 0, sizeof(sel.tclick2));
        sel.mode = 0;
        sel.bx = -1;
        sel.clip = NULL;
@@ -476,8 +521,7 @@ bpress(XEvent *e) {
                mousereport(e);
        else if(e->xbutton.button == Button1) {
                if(sel.bx != -1)
-                       for(int i=sel.b.y; i<=sel.e.y; i++)
-                               term.dirty[i] = 1;
+                       tsetdirt(sel.b.y, sel.e.y);
                sel.mode = 1;
                sel.ex = sel.bx = X2COL(e->xbutton.x);
                sel.ey = sel.by = Y2ROW(e->xbutton.y);
@@ -487,21 +531,28 @@ bpress(XEvent *e) {
 void
 selcopy(void) {
        char *str, *ptr;
-       int x, y, sz, sl, ls = 0;
+       int x, y, bufsize, is_selected = 0;
 
        if(sel.bx == -1)
                str = NULL;
+
        else {
-               sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
-               ptr = str = malloc(sz);
+               bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
+               ptr = str = malloc(bufsize);
+
+               /* append every set & selected glyph to the selection */
                for(y = 0; y < term.row; y++) {
-                       for(x = 0; x < term.col; x++)
-                               if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
-                                       sl = utf8size(term.line[y][x].c);
-                                       memcpy(ptr, term.line[y][x].c, sl);
-                                       ptr += sl;
+                       for(x = 0; x < term.col; x++) {
+                               is_selected = selected(x, y);
+                               if((term.line[y][x].state & GLYPH_SET) && is_selected) {
+                                       int size = utf8size(term.line[y][x].c);
+                                       memcpy(ptr, term.line[y][x].c, size);
+                                       ptr += size;
                                }
-                       if(ls && y < sel.e.y)
+                       }
+
+                       /* \n at the end of every selected line except for the last one */
+                       if(is_selected && y < sel.e.y)
                                *ptr++ = '\n';
                }
                *ptr = 0;
@@ -643,8 +694,7 @@ bmotion(XEvent *e) {
                if(oldey != sel.ey || oldex != sel.ex) {
                        int starty = MIN(oldey, sel.ey);
                        int endy = MAX(oldey, sel.ey);
-                       for(int i = starty; i <= endy; i++)
-                               term.dirty[i] = 1;
+                       tsetdirt(starty, endy);
                        draw();
                }
        }
@@ -665,7 +715,7 @@ execsh(void) {
        char **args;
        char *envshell = getenv("SHELL");
 
-       DEFAULT(envshell, "sh");
+       DEFAULT(envshell, SHELL);
        putenv("TERM="TNAME);
        args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
        execvp(args[0], args);
@@ -769,14 +819,24 @@ ttyresize(int x, int y) {
 }
 
 void
-tfulldirt(void)
+tsetdirt(int top, int bot)
 {
        int i;
-       for(i = 0; i < term.row; i++)
+
+       LIMIT(top, 0, term.row-1);
+       LIMIT(bot, 0, term.row-1);
+
+       for(i = top; i <= bot; i++)
                term.dirty[i] = 1;
 }
 
 void
+tfulldirt(void)
+{
+       tsetdirt(0, term.row-1);
+}
+
+void
 tcursor(int mode) {
        static TCursor c;
 
@@ -1343,8 +1403,17 @@ csihandle(void) {
 
 void
 csidump(void) {
-       fwrite("\033[", 1, 2, stdout);
-       fwrite(escseq.buf, 1, escseq.len, stdout);
+       int i;
+       printf("ESC[");
+       for(i = 0; i < escseq.len; i++) {
+               uint c = escseq.buf[i] & 0xff;
+               if(isprint(c)) putchar(c);
+               else if(c == '\n') printf("(\\n)");
+               else if(c == '\r') printf("(\\r)");
+               else if(c == 0x1b) printf("(\\e)");
+               else printf("(%02x)", c);
+       }
+       putchar('\n');
 }
 
 void