diff options
Diffstat (limited to 'src/nvim/undo.c')
| -rw-r--r-- | src/nvim/undo.c | 111 |
1 files changed, 57 insertions, 54 deletions
diff --git a/src/nvim/undo.c b/src/nvim/undo.c index b8cdffcda0..f16b4264d7 100644 --- a/src/nvim/undo.c +++ b/src/nvim/undo.c @@ -4,29 +4,29 @@ * The saved lines are stored in a list of lists (one for each buffer): * * b_u_oldhead------------------------------------------------+ - * | - * V - * +--------------+ +--------------+ +--------------+ - * b_u_newhead--->| u_header | | u_header | | u_header | - * | uh_next------>| uh_next------>| uh_next---->NULL - * NULL<--------uh_prev |<---------uh_prev |<---------uh_prev | - * | uh_entry | | uh_entry | | uh_entry | - * +--------|-----+ +--------|-----+ +--------|-----+ - * | | | - * V V V - * +--------------+ +--------------+ +--------------+ - * | u_entry | | u_entry | | u_entry | - * | ue_next | | ue_next | | ue_next | - * +--------|-----+ +--------|-----+ +--------|-----+ - * | | | - * V V V - * +--------------+ NULL NULL - * | u_entry | - * | ue_next | - * +--------|-----+ - * | - * V - * etc. + * | + * V + * +--------------+ +--------------+ +--------------+ + * b_u_newhead--->| u_header | | u_header | | u_header | + * | uh_next------>| uh_next------>| uh_next---->NULL + * NULL<--------uh_prev |<---------uh_prev |<---------uh_prev | + * | uh_entry | | uh_entry | | uh_entry | + * +--------|-----+ +--------|-----+ +--------|-----+ + * | | | + * V V V + * +--------------+ +--------------+ +--------------+ + * | u_entry | | u_entry | | u_entry | + * | ue_next | | ue_next | | ue_next | + * +--------|-----+ +--------|-----+ +--------|-----+ + * | | | + * V V V + * +--------------+ NULL NULL + * | u_entry | + * | ue_next | + * +--------|-----+ + * | + * V + * etc. * * Each u_entry list contains the information for one undo or redo. * curbuf->b_u_curhead points to the header of the last undo (the next redo), @@ -37,30 +37,30 @@ * uh_seq field is numbered sequentially to be able to find a newer or older * branch. * - * +---------------+ +---------------+ - * b_u_oldhead --->| u_header | | u_header | - * | uh_alt_next ---->| uh_alt_next ----> NULL - * NULL <----- uh_alt_prev |<------ uh_alt_prev | - * | uh_prev | | uh_prev | - * +-----|---------+ +-----|---------+ - * | | - * V V - * +---------------+ +---------------+ - * | u_header | | u_header | - * | uh_alt_next | | uh_alt_next | - * b_u_newhead --->| uh_alt_prev | | uh_alt_prev | - * | uh_prev | | uh_prev | - * +-----|---------+ +-----|---------+ - * | | - * V V - * NULL +---------------+ +---------------+ - * | u_header | | u_header | - * | uh_alt_next ---->| uh_alt_next | - * | uh_alt_prev |<------ uh_alt_prev | - * | uh_prev | | uh_prev | - * +-----|---------+ +-----|---------+ - * | | - * etc. etc. + * +---------------+ +---------------+ + * b_u_oldhead --->| u_header | | u_header | + * | uh_alt_next ---->| uh_alt_next ----> NULL + * NULL <----- uh_alt_prev |<------ uh_alt_prev | + * | uh_prev | | uh_prev | + * +-----|---------+ +-----|---------+ + * | | + * V V + * +---------------+ +---------------+ + * | u_header | | u_header | + * | uh_alt_next | | uh_alt_next | + * b_u_newhead --->| uh_alt_prev | | uh_alt_prev | + * | uh_prev | | uh_prev | + * +-----|---------+ +-----|---------+ + * | | + * V V + * NULL +---------------+ +---------------+ + * | u_header | | u_header | + * | uh_alt_next ---->| uh_alt_next | + * | uh_alt_prev |<------ uh_alt_prev | + * | uh_prev | | uh_prev | + * +-----|---------+ +-----|---------+ + * | | + * etc. etc. * * * All data is allocated and will all be freed when the buffer is unloaded. @@ -1782,7 +1782,13 @@ void undo_time(long step, int sec, int file, int absolute) /* "target" is the node below which we want to be. * Init "closest" to a value we can't reach. */ if (absolute) { - target = step; + if (step == 0) { + // target 0 does not exist, got to 1 and above it. + target = 1; + above = true; + } else { + target = step; + } closest = -1; } else { /* When doing computations with time_t subtract starttime, because @@ -2870,9 +2876,7 @@ static char_u *u_save_line(linenr_T lnum) /// @return true if the buffer has changed bool bufIsChanged(buf_T *buf) { - return - !bt_dontwrite(buf) && - (buf->b_changed || file_ff_differs(buf, true)); + return !bt_dontwrite(buf) && (buf->b_changed || file_ff_differs(buf, true)); } /// Check if the 'modified' flag is set, or 'ff' has changed (only need to @@ -2882,9 +2886,8 @@ bool bufIsChanged(buf_T *buf) /// @return true if the current buffer has changed bool curbufIsChanged(void) { - return - !bt_dontwrite(curbuf) && - (curbuf->b_changed || file_ff_differs(curbuf, true)); + return (!bt_dontwrite(curbuf) + && (curbuf->b_changed || file_ff_differs(curbuf, true))); } /* |