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tui: eliminate scrolling region data structure

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The scrolling region is always local to a single grid_scroll event, use
local variables and parameters instead.

The invocation of reset_scroll_region in grid_resize is cargo-culted to use
margin reset under exactly the same circumstances, not sure if it is necessary
though.
This commit is contained in:
Björn Linse 2018-09-26 13:06:20 +02:00
parent 1b8939d233
commit edb26f2c65
3 changed files with 42 additions and 59 deletions
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69
src/nvim/tui/tui.c
View File

@ -765,43 +765,31 @@ static void clear_region(UI *ui, int top, int bot, int left, int right,
cursor_goto(ui, data->row, data->col);
}
static bool can_use_scroll(UI * ui)
static void set_scroll_region(UI *ui, int top, int bot, int left, int right)
{
TUIData *data = ui->data;
UGrid *grid = &data->grid;
return data->scroll_region_is_full_screen
|| (data->can_change_scroll_region
&& ((grid->left == 0 && grid->right == ui->width - 1)
|| data->can_set_lr_margin
|| data->can_set_left_right_margin));
}
static void set_scroll_region(UI *ui)
{
TUIData *data = ui->data;
UGrid *grid = &data->grid;
UNIBI_SET_NUM_VAR(data->params[0], grid->top);
UNIBI_SET_NUM_VAR(data->params[1], grid->bot);
UNIBI_SET_NUM_VAR(data->params[0], top);
UNIBI_SET_NUM_VAR(data->params[1], bot);
unibi_out(ui, unibi_change_scroll_region);
if (grid->left != 0 || grid->right != ui->width - 1) {
if (left != 0 || right != ui->width - 1) {
unibi_out_ext(ui, data->unibi_ext.enable_lr_margin);
if (data->can_set_lr_margin) {
UNIBI_SET_NUM_VAR(data->params[0], grid->left);
UNIBI_SET_NUM_VAR(data->params[1], grid->right);
UNIBI_SET_NUM_VAR(data->params[0], left);
UNIBI_SET_NUM_VAR(data->params[1], right);
unibi_out(ui, unibi_set_lr_margin);
} else {
UNIBI_SET_NUM_VAR(data->params[0], grid->left);
UNIBI_SET_NUM_VAR(data->params[0], left);
unibi_out(ui, unibi_set_left_margin_parm);
UNIBI_SET_NUM_VAR(data->params[0], grid->right);
UNIBI_SET_NUM_VAR(data->params[0], right);
unibi_out(ui, unibi_set_right_margin_parm);
}
}
unibi_goto(ui, grid->row, grid->col);
}
static void reset_scroll_region(UI *ui)
static void reset_scroll_region(UI *ui, bool fullwidth)
{
TUIData *data = ui->data;
UGrid *grid = &data->grid;
@ -813,7 +801,7 @@ static void reset_scroll_region(UI *ui)
UNIBI_SET_NUM_VAR(data->params[1], ui->height - 1);
unibi_out(ui, unibi_change_scroll_region);
}
if (grid->left != 0 || grid->right != ui->width - 1) {
if (!fullwidth) {
if (data->can_set_lr_margin) {
UNIBI_SET_NUM_VAR(data->params[0], 0);
UNIBI_SET_NUM_VAR(data->params[1], ui->width - 1);
@ -850,7 +838,7 @@ static void tui_grid_resize(UI *ui, Integer g, Integer width, Integer height)
unibi_out_ext(ui, data->unibi_ext.resize_screen);
// DECSLPP does not reset the scroll region.
if (data->scroll_region_is_full_screen) {
reset_scroll_region(ui);
reset_scroll_region(ui, ui->width == grid->width);
}
} else { // Already handled the SIGWINCH signal; avoid double-resize.
got_winch = false;
@ -1008,28 +996,35 @@ static void tui_mode_change(UI *ui, String mode, Integer mode_idx)
data->showing_mode = (ModeShape)mode_idx;
}
static void tui_grid_scroll(UI *ui, Integer g, Integer top, Integer bot,
Integer left, Integer right,
static void tui_grid_scroll(UI *ui, Integer g, Integer startrow, Integer endrow,
Integer startcol, Integer endcol,
Integer rows, Integer cols)
{
TUIData *data = ui->data;
UGrid *grid = &data->grid;
ugrid_set_scroll_region(&data->grid, (int)top, (int)bot-1,
(int)left, (int)right-1);
int top = (int)startrow, bot = (int)endrow-1;
int left = (int)startcol, right = (int)endcol-1;
data->scroll_region_is_full_screen =
left == 0 && right == ui->width
&& top == 0 && bot == ui->height;
bool fullwidth = left == 0 && right == ui->width-1;
data->scroll_region_is_full_screen = fullwidth
&& top == 0 && bot == ui->height-1;
int clear_top, clear_bot;
ugrid_scroll(grid, (int)rows, &clear_top, &clear_bot);
ugrid_scroll(grid, top, bot, left, right, (int)rows,
&clear_top, &clear_bot);
if (can_use_scroll(ui)) {
bool can_scroll = data->scroll_region_is_full_screen
|| (data->can_change_scroll_region
&& ((left == 0 && right == ui->width - 1)
|| data->can_set_lr_margin
|| data->can_set_left_right_margin));
if (can_scroll) {
// Change terminal scroll region and move cursor to the top
if (!data->scroll_region_is_full_screen) {
set_scroll_region(ui);
set_scroll_region(ui, top, bot, left, right);
}
cursor_goto(ui, grid->top, grid->left);
cursor_goto(ui, top, left);
// also set default color attributes or some terminals can become funny
update_attrs(ui, data->clear_attrs);
@ -1051,19 +1046,19 @@ static void tui_grid_scroll(UI *ui, Integer g, Integer top, Integer bot,
// Restore terminal scroll region and cursor
if (!data->scroll_region_is_full_screen) {
reset_scroll_region(ui);
reset_scroll_region(ui, fullwidth);
}
cursor_goto(ui, data->row, data->col);
if (!(data->bce || no_bg(ui, data->clear_attrs))) {
// Scrolling will leave wrong background in the cleared area on non-BCE
// terminals. Update the cleared area.
clear_region(ui, clear_top, clear_bot, grid->left, grid->right,
clear_region(ui, clear_top, clear_bot, left, right,
data->clear_attrs);
}
} else {
// Mark the entire scroll region as invalid for redrawing later
invalidate(ui, grid->top, grid->bot, grid->left, grid->right);
invalidate(ui, top, bot, left, right);
}
}

31
src/nvim/ugrid.c
View File

@ -32,10 +32,6 @@ void ugrid_resize(UGrid *grid, int width, int height)
grid->cells[i] = xcalloc((size_t)width, sizeof(UCell));
}
grid->top = 0;
grid->bot = height - 1;
grid->left = 0;
grid->right = width - 1;
grid->row = grid->col = 0;
grid->width = width;
grid->height = height;
@ -57,25 +53,18 @@ void ugrid_goto(UGrid *grid, int row, int col)
grid->col = col;
}
void ugrid_set_scroll_region(UGrid *grid, int top, int bot, int left, int right)
{
grid->top = top;
grid->bot = bot;
grid->left = left;
grid->right = right;
}
void ugrid_scroll(UGrid *grid, int count, int *clear_top, int *clear_bot)
void ugrid_scroll(UGrid *grid, int top, int bot, int left, int right,
int count, int *clear_top, int *clear_bot)
{
// Compute start/stop/step for the loop below
int start, stop, step;
if (count > 0) {
start = grid->top;
stop = grid->bot - count + 1;
start = top;
stop = bot - count + 1;
step = 1;
} else {
start = grid->bot;
stop = grid->top - count - 1;
start = bot;
stop = top - count - 1;
step = -1;
}
@ -83,10 +72,10 @@ void ugrid_scroll(UGrid *grid, int count, int *clear_top, int *clear_bot)
// Copy cell data
for (i = start; i != stop; i += step) {
UCell *target_row = grid->cells[i] + grid->left;
UCell *source_row = grid->cells[i + count] + grid->left;
UCell *target_row = grid->cells[i] + left;
UCell *source_row = grid->cells[i + count] + left;
memcpy(target_row, source_row,
sizeof(UCell) * (size_t)(grid->right - grid->left + 1));
sizeof(UCell) * (size_t)(right - left + 1));
}
// clear cells in the emptied region,
@ -97,7 +86,7 @@ void ugrid_scroll(UGrid *grid, int count, int *clear_top, int *clear_bot)
*clear_bot = stop;
*clear_top = stop + count + 1;
}
clear_region(grid, *clear_top, *clear_bot, grid->left, grid->right, 0);
clear_region(grid, *clear_top, *clear_bot, left, right, 0);
}
static void clear_region(UGrid *grid, int top, int bot, int left, int right,

1
src/nvim/ugrid.h
View File

@ -15,7 +15,6 @@ struct ucell {
};
struct ugrid {
int top, bot, left, right;
int row, col;
int width, height;
UCell **cells;