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term: convert cell 'linefeed' attribute to a row 'linebreak' property

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To do text reflow, we only need to know if a line has been explicitly
linebreaked or not. If not, that means it wrapped, and that we
should *not* insert a linebreak when reflowing text.

When reflowing text, when reaching the end of a row in the old grid,
only insert a linebreak in the new grid if the old row had been
explicitly linebreaked.

Furthermore, when reflowing text and wrapping a row in the new grid,
mark the previous row as linebreaked if either the last cell was
(the last column in the last row) empty, or the current cell (the
first column in the new row) is empty. If both are non-empty, then we
assume a linewrap.
This commit is contained in:
Daniel Eklöf 2020-02-14 22:39:26 +01:00
parent 60056fdd61
commit ce8005545d
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GPG key ID: 5BBD4992C116573F
5 changed files with 30 additions and 42 deletions
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4
terminal.h
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@ -42,8 +42,7 @@ struct attributes {
uint32_t have_fg:1;
uint32_t have_bg:1;
uint32_t selected:2;
uint32_t linefeed:1;
uint32_t reserved:2;
uint32_t reserved:3;
uint32_t bg:24;
};
static_assert(sizeof(struct attributes) == 8, "bad size");
@ -84,6 +83,7 @@ struct damage {
struct row {
struct cell *cells;
bool dirty;
bool linebreak;
};
struct grid {