From: Roberto E. Vargas Caballero Date: Wed, 29 Aug 2012 17:59:37 +0000 (+0200) Subject: Add tabs field into Term struct X-Git-Url: https://git.danieliu.xyz/?a=commitdiff_plain;h=ee7fd748ac7bfabda2ac37251d230b45adb3e138;p=st.git Add tabs field into Term struct Tabs stop are simulated in st using a fixed size of 8, always, without be worried about sequences changing the tab stops. A user can put a tab stop in each horizontal position of the screen, so we need at least one flag for each column of the screen. In the same way as dirty flags is used for the rows, it is used a bool dinamic array. Signed-off-by: Roberto E. Vargas Caballero --- st.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) --- diff --git a/st.c b/st.c index 4fc4d3d..d169ddf 100644 --- a/st.c +++ b/st.c @@ -164,7 +164,7 @@ typedef struct { int col; /* nb col */ Line* line; /* screen */ Line* alt; /* alternate screen */ - bool* dirty; /* dirtyness of lines */ + bool* dirty; /* dirtyness of lines */ TCursor c; /* cursor */ int top; /* top scroll limit */ int bot; /* bottom scroll limit */ @@ -172,6 +172,7 @@ typedef struct { int esc; /* escape state flags */ char title[ESC_TITLE_SIZ]; int titlelen; + bool *tabs; } Term; /* Purely graphic info */ @@ -847,12 +848,16 @@ tcursor(int mode) { void treset(void) { + unsigned i; term.c = (TCursor){{ .mode = ATTR_NULL, .fg = DefaultFG, .bg = DefaultBG }, .x = 0, .y = 0, .state = CURSOR_DEFAULT}; - + + memset(term.tabs, 0, term.col * sizeof(*term.tabs)); + for (i = TAB; i < term.col; i += TAB) + term.tabs[i] = 1; term.top = 0, term.bot = term.row - 1; term.mode = MODE_WRAP; tclearregion(0, 0, term.col-1, term.row-1); @@ -865,12 +870,14 @@ tnew(int col, int row) { term.line = malloc(term.row * sizeof(Line)); term.alt = malloc(term.row * sizeof(Line)); term.dirty = malloc(term.row * sizeof(*term.dirty)); + term.tabs = malloc(term.col * sizeof(*term.tabs)); for(row = 0; row < term.row; row++) { term.line[row] = malloc(term.col * sizeof(Glyph)); term.alt [row] = malloc(term.col * sizeof(Glyph)); term.dirty[row] = 0; } + memset(term.tabs, 0, term.col * sizeof(*term.tabs)); /* setup screen */ treset(); } @@ -1588,6 +1595,7 @@ tresize(int col, int row) { term.line = realloc(term.line, row * sizeof(Line)); term.alt = realloc(term.alt, row * sizeof(Line)); term.dirty = realloc(term.dirty, row * sizeof(*term.dirty)); + term.tabs = realloc(term.tabs, col * sizeof(*term.tabs)); /* resize each row to new width, zero-pad if needed */ for(i = 0; i < minrow; i++) { @@ -1606,7 +1614,15 @@ tresize(int col, int row) { term.line[i] = calloc(col, sizeof(Glyph)); term.alt [i] = calloc(col, sizeof(Glyph)); } - + if (col > term.col) { + bool *bp = term.tabs + term.col; + + memset(bp, 0, sizeof(*term.tabs) * (col - term.col)); + while (--bp > term.tabs && !*bp) + /* nothing */ ; + for (bp += TAB; bp < term.tabs + col; bp += TAB) + *bp = 1; + } /* update terminal size */ term.col = col, term.row = row; /* make use of the LIMIT in tmoveto */