vi: undo support for vi with intermediate queuing
function old new delta undo_push - 411 +411 undo_pop - 288 +288 do_cmd 4160 4426 +266 char_insert 363 483 +120 undo_queue_commit - 61 +61 text_hole_delete 108 163 +55 string_insert 94 127 +33 colon 2864 2882 +18 yank_delete 92 101 +9 vi_main 273 280 +7 dot_scroll 88 93 +5 dot_right 29 34 +5 dot_prev 20 25 +5 dot_next 20 25 +5 dot_left 24 29 +5 dot_end 20 25 +5 dot_begin 20 25 +5 init_text_buffer 154 156 +2 text_hole_make 145 142 -3 file_insert 333 318 -15 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 15/2 up/down: 1305/-18) Total: 1287 bytes (without queuing it's ~870 bytes) Signed-off-by: Jody Bruchon <jody@jodybruchon.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Jody Bruchon
Denys Vlasenko
parent
7537406edd
commit
a8d6f9bee4
502
editors/vi.c
502
editors/vi.c
@ -17,7 +17,6 @@
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* it would be easier to change the mark when add/delete lines
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* More intelligence in refresh()
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* ":r !cmd" and "!cmd" to filter text through an external command
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* A true "undo" facility
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* An "ex" line oriented mode- maybe using "cmdedit"
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*/
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@ -136,6 +135,36 @@
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//config: cursor position using "ESC [ 6 n" escape sequence, then read stdin.
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//config:
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//config: This is not clean but helps a lot on serial lines and such.
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//config:config FEATURE_VI_UNDO
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//config: bool "Support undo command 'u'"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Support the 'u' command to undo insertion, deletion, and replacement
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//config: of text.
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//config:config FEATURE_VI_UNDO_QUEUE
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//config: bool "Enable undo operation queuing"
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//config: default y
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//config: depends on FEATURE_VI_UNDO
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//config: help
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//config: The vi undo functions can use an intermediate queue to greatly lower
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//config: malloc() calls and overhead. When the maximum size of this queue is
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//config: reached, the contents of the queue are committed to the undo stack.
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//config: This increases the size of the undo code and allows some undo
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//config: operations (especially un-typing/backspacing) to be far more useful.
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//config:config FEATURE_VI_UNDO_QUEUE_MAX
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//config: int "Maximum undo character queue size"
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//config: default 256
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//config: range 32 65536
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//config: depends on FEATURE_VI_UNDO_QUEUE
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//config: help
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//config: This option sets the number of bytes used at runtime for the queue.
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//config: Smaller values will create more undo objects and reduce the amount
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//config: of typed or backspaced characters that are grouped into one undo
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//config: operation; larger values increase the potential size of each undo
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//config: and will generally malloc() larger objects and less frequently.
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//config: Unless you want more (or less) frequent "undo points" while typing,
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//config: you should probably leave this unchanged.
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//applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
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@ -347,6 +376,42 @@ struct globals {
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char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
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char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
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#if ENABLE_FEATURE_VI_UNDO
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// undo_push() operations
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#define UNDO_INS 0
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#define UNDO_DEL 1
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#define UNDO_INS_CHAIN 2
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#define UNDO_DEL_CHAIN 3
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// UNDO_*_QUEUED must be equal to UNDO_xxx ORed with UNDO_QUEUED_FLAG
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#define UNDO_QUEUED_FLAG 4
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#define UNDO_INS_QUEUED 4
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#define UNDO_DEL_QUEUED 5
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#define UNDO_USE_SPOS 32
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#define UNDO_EMPTY 64
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// Pass-through flags for functions that can be undone
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#define NO_UNDO 0
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#define ALLOW_UNDO 1
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#define ALLOW_UNDO_CHAIN 2
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#if ENABLE_FEATURE_VI_UNDO_QUEUE
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#define ALLOW_UNDO_QUEUED 3
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char undo_queue_state;
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int undo_q;
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char *undo_queue_spos; // Start position of queued operation
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char undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX];
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#else
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// If undo queuing disabled, don't invoke the missing queue logic
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#define ALLOW_UNDO_QUEUED 1
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#endif /* ENABLE_FEATURE_VI_UNDO_QUEUE */
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struct undo_object {
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struct undo_object *prev; // Linking back avoids list traversal (LIFO)
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int u_type; // 0=deleted, 1=inserted, 2=swapped
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int start; // Offset where the data should be restored/deleted
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int length; // total data size
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char *undo_text; // ptr to text that will be inserted
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} *undo_stack_tail;
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#endif /* ENABLE_FEATURE_VI_UNDO */
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};
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#define G (*ptr_to_globals)
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#define text (G.text )
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@ -408,6 +473,16 @@ struct globals {
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#define last_modifying_cmd (G.last_modifying_cmd )
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#define get_input_line__buf (G.get_input_line__buf)
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#if ENABLE_FEATURE_VI_UNDO
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#define undo_stack_tail (G.undo_stack_tail )
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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#define undo_queue_state (G.undo_queue_state)
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#define undo_q (G.undo_q )
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#define undo_queue (G.undo_queue )
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#define undo_queue_spos (G.undo_queue_spos )
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# endif
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#endif
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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last_file_modified = -1; \
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@ -437,10 +512,12 @@ static void dot_next(void); // move dot to next line B-o-l
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static void dot_prev(void); // move dot to prev line B-o-l
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static void dot_scroll(int, int); // move the screen up or down
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static void dot_skip_over_ws(void); // move dot pat WS
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static void dot_delete(void); // delete the char at 'dot'
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static char *bound_dot(char *); // make sure text[0] <= P < "end"
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static char *new_screen(int, int); // malloc virtual screen memory
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static char *char_insert(char *, char); // insert the char c at 'p'
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#if !ENABLE_FEATURE_VI_UNDO
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#define char_insert(a,b,c) char_insert(a,b)
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#endif
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static char *char_insert(char *, char, int); // insert the char c at 'p'
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// might reallocate text[]! use p += stupid_insert(p, ...),
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// and be careful to not use pointers into potentially freed text[]!
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static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
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@ -448,11 +525,17 @@ static int find_range(char **, char **, char); // return pointers for an object
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static int st_test(char *, int, int, char *); // helper for skip_thing()
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static char *skip_thing(char *, int, int, int); // skip some object
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static char *find_pair(char *, char); // find matching pair () [] {}
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static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
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#if !ENABLE_FEATURE_VI_UNDO
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#define text_hole_delete(a,b,c) text_hole_delete(a,b)
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#endif
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static char *text_hole_delete(char *, char *, int); // at "p", delete a 'size' byte hole
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// might reallocate text[]! use p += text_hole_make(p, ...),
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// and be careful to not use pointers into potentially freed text[]!
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static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
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static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
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#if !ENABLE_FEATURE_VI_UNDO
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#define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d)
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#endif
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static char *yank_delete(char *, char *, int, int, int); // yank text[] into register then delete
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static void show_help(void); // display some help info
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static void rawmode(void); // set "raw" mode on tty
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static void cookmode(void); // return to "cooked" mode on tty
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@ -514,20 +597,34 @@ static void showmatching(char *); // show the matching pair () [] {}
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#if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
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// might reallocate text[]! use p += string_insert(p, ...),
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// and be careful to not use pointers into potentially freed text[]!
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static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
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# if !ENABLE_FEATURE_VI_UNDO
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#define string_insert(a,b,c) string_insert(a,b)
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# endif
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static uintptr_t string_insert(char *, const char *, int); // insert the string at 'p'
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#endif
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#if ENABLE_FEATURE_VI_YANKMARK
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static char *text_yank(char *, char *, int); // save copy of "p" into a register
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static char what_reg(void); // what is letter of current YDreg
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static void check_context(char); // remember context for '' command
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#endif
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#if ENABLE_FEATURE_VI_UNDO
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static void undo_push(char *, unsigned int, unsigned char); // Push an operation on the undo stack
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static void undo_pop(void); // Undo the last operation
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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static void undo_queue_commit(void); // Flush any queued objects to the undo stack
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# else
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# define undo_queue_commit() ((void)0)
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# endif
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#else
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#define undo_queue_commit() ((void)0)
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#endif
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#if ENABLE_FEATURE_VI_CRASHME
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static void crash_dummy();
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static void crash_test();
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static int crashme = 0;
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#endif
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static void write1(const char *out)
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{
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fputs(out, stdout);
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@ -540,6 +637,14 @@ int vi_main(int argc, char **argv)
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INIT_G();
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#if ENABLE_FEATURE_VI_UNDO
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/* undo_stack_tail = NULL; - already is */
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#if ENABLE_FEATURE_VI_UNDO_QUEUE
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undo_queue_state = UNDO_EMPTY;
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/* undo_q = 0; - already is */
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#endif
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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my_pid = getpid();
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#endif
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@ -631,7 +736,7 @@ static int init_text_buffer(char *fn)
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}
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if (size < 0) {
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// file dont exist. Start empty buf with dummy line
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char_insert(text, '\n');
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char_insert(text, '\n', NO_UNDO);
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rc = 0;
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} else {
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rc = file_insert(fn, text, 1);
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@ -756,7 +861,7 @@ static void edit_file(char *fn)
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crash_dummy(); // generate a random command
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} else {
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crashme = 0;
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string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
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string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n", NO_UNDO); // insert the string
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dot = text;
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refresh(FALSE);
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}
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@ -1015,7 +1120,7 @@ static void colon(char *buf)
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q = begin_line(dot); // assume .,. for the range
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r = end_line(dot);
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}
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dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
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dot = yank_delete(q, r, 1, YANKDEL, ALLOW_UNDO); // save, then delete lines
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dot_skip_over_ws();
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} else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
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// don't edit, if the current file has been modified
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@ -1175,7 +1280,7 @@ static void colon(char *buf)
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// if the insert is before "dot" then we need to update
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if (q <= dot)
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dot += ch;
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/*file_modified++; - done by file_insert */
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// file_modified++;
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}
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} else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
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if (file_modified && !useforce) {
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@ -1235,6 +1340,9 @@ static void colon(char *buf)
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char *F, *R, *flags;
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size_t len_F, len_R;
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int gflag; // global replace flag
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#if ENABLE_FEATURE_VI_UNDO
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int dont_chain_first_item = ALLOW_UNDO;
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#endif
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// F points to the "find" pattern
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// R points to the "replace" pattern
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@ -1269,9 +1377,13 @@ static void colon(char *buf)
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if (found) {
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uintptr_t bias;
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// we found the "find" pattern - delete it
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text_hole_delete(found, found + len_F - 1);
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// inset the "replace" patern
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bias = string_insert(found, R); // insert the string
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// For undo support, the first item should not be chained
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text_hole_delete(found, found + len_F - 1, dont_chain_first_item);
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#if ENABLE_FEATURE_VI_UNDO
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dont_chain_first_item = ALLOW_UNDO_CHAIN;
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#endif
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// insert the "replace" patern
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bias = string_insert(found, R, ALLOW_UNDO_CHAIN);
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found += bias;
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ls += bias;
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/*q += bias; - recalculated anyway */
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@ -1572,23 +1684,27 @@ static char *find_line(int li) // find begining of line #li
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//----- Dot Movement Routines ----------------------------------
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static void dot_left(void)
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{
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undo_queue_commit();
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if (dot > text && dot[-1] != '\n')
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dot--;
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}
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static void dot_right(void)
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{
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undo_queue_commit();
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if (dot < end - 1 && *dot != '\n')
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dot++;
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}
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static void dot_begin(void)
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{
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undo_queue_commit();
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dot = begin_line(dot); // return pointer to first char cur line
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}
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static void dot_end(void)
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{
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undo_queue_commit();
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dot = end_line(dot); // return pointer to last char cur line
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}
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@ -1614,11 +1730,13 @@ static char *move_to_col(char *p, int l)
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static void dot_next(void)
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{
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undo_queue_commit();
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dot = next_line(dot);
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}
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static void dot_prev(void)
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{
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undo_queue_commit();
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dot = prev_line(dot);
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}
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@ -1626,6 +1744,7 @@ static void dot_scroll(int cnt, int dir)
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{
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char *q;
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undo_queue_commit();
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for (; cnt > 0; cnt--) {
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if (dir < 0) {
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// scroll Backwards
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@ -1653,11 +1772,6 @@ static void dot_skip_over_ws(void)
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dot++;
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}
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static void dot_delete(void) // delete the char at 'dot'
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{
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text_hole_delete(dot, dot);
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}
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static char *bound_dot(char *p) // make sure text[0] <= P < "end"
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{
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if (p >= end && end > text) {
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@ -1804,17 +1918,34 @@ static char *char_search(char *p, const char *pat, int dir, int range)
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#endif /* FEATURE_VI_SEARCH */
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static char *char_insert(char *p, char c) // insert the char c at 'p'
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static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
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{
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if (c == 22) { // Is this an ctrl-V?
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p += stupid_insert(p, '^'); // use ^ to indicate literal next
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refresh(FALSE); // show the ^
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c = get_one_char();
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*p = c;
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p++;
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#if ENABLE_FEATURE_VI_UNDO
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switch (undo) {
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case ALLOW_UNDO:
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undo_push(p, 1, UNDO_INS);
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break;
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case ALLOW_UNDO_CHAIN:
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undo_push(p, 1, UNDO_INS_CHAIN);
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break;
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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case ALLOW_UNDO_QUEUED:
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undo_push(p, 1, UNDO_INS_QUEUED);
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break;
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# endif
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}
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#else
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file_modified++;
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#endif /* ENABLE_FEATURE_VI_UNDO */
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p++;
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} else if (c == 27) { // Is this an ESC?
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cmd_mode = 0;
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undo_queue_commit();
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cmdcnt = 0;
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end_cmd_q(); // stop adding to q
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last_status_cksum = 0; // force status update
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@ -1825,7 +1956,7 @@ static char *char_insert(char *p, char c) // insert the char c at 'p'
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// 123456789
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if ((p[-1] != '\n') && (dot>text)) {
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p--;
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p = text_hole_delete(p, p); // shrink buffer 1 char
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p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char
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}
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} else {
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#if ENABLE_FEATURE_VI_SETOPTS
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@ -1838,6 +1969,27 @@ static char *char_insert(char *p, char c) // insert the char c at 'p'
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#if ENABLE_FEATURE_VI_SETOPTS
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sp = p; // remember addr of insert
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#endif
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#if ENABLE_FEATURE_VI_UNDO
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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if (c == '\n')
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undo_queue_commit();
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# endif
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switch (undo) {
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case ALLOW_UNDO:
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undo_push(p, 1, UNDO_INS);
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break;
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case ALLOW_UNDO_CHAIN:
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undo_push(p, 1, UNDO_INS_CHAIN);
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break;
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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case ALLOW_UNDO_QUEUED:
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undo_push(p, 1, UNDO_INS_QUEUED);
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break;
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# endif
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}
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#else
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file_modified++;
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#endif /* ENABLE_FEATURE_VI_UNDO */
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p += 1 + stupid_insert(p, c); // insert the char
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#if ENABLE_FEATURE_VI_SETOPTS
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if (showmatch && strchr(")]}", *sp) != NULL) {
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@ -1853,6 +2005,9 @@ static char *char_insert(char *p, char c) // insert the char c at 'p'
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bias = text_hole_make(p, len);
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p += bias;
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q += bias;
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#if ENABLE_FEATURE_VI_UNDO
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undo_push(p, len, UNDO_INS);
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#endif
|
||||
memcpy(p, q, len);
|
||||
p += len;
|
||||
}
|
||||
@ -1870,7 +2025,6 @@ static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at
|
||||
bias = text_hole_make(p, 1);
|
||||
p += bias;
|
||||
*p = c;
|
||||
//file_modified++; - done by text_hole_make()
|
||||
return bias;
|
||||
}
|
||||
|
||||
@ -2051,6 +2205,185 @@ static void showmatching(char *p)
|
||||
}
|
||||
#endif /* FEATURE_VI_SETOPTS */
|
||||
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
// Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com)
|
||||
static void undo_push(char *src, unsigned int length, unsigned char u_type) // Add to the undo stack
|
||||
{
|
||||
struct undo_object *undo_temp;
|
||||
// "u_type" values
|
||||
// UNDO_INS: insertion, undo will remove from buffer
|
||||
// UNDO_DEL: deleted text, undo will restore to buffer
|
||||
// UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete
|
||||
// The CHAIN operations are for handling multiple operations that the user
|
||||
// performs with a single action, i.e. REPLACE mode or find-and-replace commands
|
||||
// UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue
|
||||
// for the INS/DEL operation. The raw values should be equal to the values of
|
||||
// UNDO_{INS,DEL} ORed with UNDO_QUEUED_FLAG
|
||||
|
||||
#if ENABLE_FEATURE_VI_UNDO_QUEUE
|
||||
// This undo queuing functionality groups multiple character typing or backspaces
|
||||
// into a single large undo object. This greatly reduces calls to malloc() for
|
||||
// single-character operations while typing and has the side benefit of letting
|
||||
// an undo operation remove chunks of text rather than a single character.
|
||||
switch (u_type) {
|
||||
case UNDO_EMPTY: // Just in case this ever happens...
|
||||
return;
|
||||
case UNDO_DEL_QUEUED:
|
||||
if (length != 1)
|
||||
return; // Only queue single characters
|
||||
switch (undo_queue_state) {
|
||||
case UNDO_EMPTY:
|
||||
undo_queue_state = UNDO_DEL;
|
||||
case UNDO_DEL:
|
||||
undo_queue_spos = src;
|
||||
undo_q++;
|
||||
undo_queue[(CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q)] = *src;
|
||||
// If queue is full, dump it into an object
|
||||
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
|
||||
undo_queue_commit();
|
||||
return;
|
||||
case UNDO_INS:
|
||||
// Switch from storing inserted text to deleted text
|
||||
undo_queue_commit();
|
||||
undo_push(src, length, UNDO_DEL_QUEUED);
|
||||
return;
|
||||
}
|
||||
break;
|
||||
case UNDO_INS_QUEUED:
|
||||
if (length != 1)
|
||||
return;
|
||||
switch (undo_queue_state) {
|
||||
case UNDO_EMPTY:
|
||||
undo_queue_state = UNDO_INS;
|
||||
undo_queue_spos = src;
|
||||
case UNDO_INS:
|
||||
undo_q++; // Don't need to save any data for insertions
|
||||
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
|
||||
undo_queue_commit();
|
||||
return;
|
||||
case UNDO_DEL:
|
||||
// Switch from storing deleted text to inserted text
|
||||
undo_queue_commit();
|
||||
undo_push(src, length, UNDO_INS_QUEUED);
|
||||
return;
|
||||
}
|
||||
break;
|
||||
}
|
||||
#else
|
||||
// If undo queuing is disabled, ignore the queuing flag entirely
|
||||
u_type = u_type & ~UNDO_QUEUED_FLAG;
|
||||
#endif
|
||||
|
||||
// Allocate a new undo object and use it as the stack tail
|
||||
undo_temp = undo_stack_tail;
|
||||
undo_stack_tail = xmalloc(sizeof(struct undo_object));
|
||||
#if ENABLE_FEATURE_VI_UNDO_QUEUE
|
||||
if ((u_type & UNDO_USE_SPOS) != 0) {
|
||||
undo_stack_tail->start = undo_queue_spos - text; // use start position from queue
|
||||
} else {
|
||||
undo_stack_tail->start = src - text; // use offset from start of text buffer
|
||||
}
|
||||
u_type = (u_type & ~UNDO_USE_SPOS);
|
||||
#else
|
||||
undo_stack_tail->start = src - text;
|
||||
#endif /* ENABLE_FEATURE_VI_UNDO_QUEUE */
|
||||
// For UNDO_DEL objects, copy the deleted text somewhere
|
||||
switch (u_type) {
|
||||
case UNDO_DEL:
|
||||
case UNDO_DEL_CHAIN:
|
||||
if ((src + length) == end)
|
||||
length--;
|
||||
// If this deletion empties text[], strip the newline. When the buffer becomes
|
||||
// zero-length, a newline is added back, which requires this to compensate.
|
||||
undo_stack_tail->undo_text = xmalloc(length);
|
||||
memcpy(undo_stack_tail->undo_text, src, length);
|
||||
break;
|
||||
}
|
||||
undo_stack_tail->prev = undo_temp;
|
||||
undo_stack_tail->length = length;
|
||||
undo_stack_tail->u_type = u_type;
|
||||
file_modified++;
|
||||
}
|
||||
|
||||
static void undo_pop(void) // Undo the last operation
|
||||
{
|
||||
int repeat = 0;
|
||||
char *u_start, *u_end;
|
||||
struct undo_object *undo_temp;
|
||||
|
||||
// Commit pending undo queue before popping (should be unnecessary)
|
||||
undo_queue_commit();
|
||||
|
||||
// Check for an empty undo stack
|
||||
if (undo_stack_tail == NULL) {
|
||||
status_line("Already at oldest change");
|
||||
return;
|
||||
}
|
||||
|
||||
switch (undo_stack_tail->u_type) {
|
||||
case UNDO_DEL:
|
||||
case UNDO_DEL_CHAIN:
|
||||
// make hole and put in text that was deleted; deallocate text
|
||||
u_start = text + undo_stack_tail->start;
|
||||
text_hole_make(u_start, undo_stack_tail->length);
|
||||
memcpy(u_start, undo_stack_tail->undo_text, undo_stack_tail->length);
|
||||
free(undo_stack_tail->undo_text);
|
||||
status_line("Undo [%d] %s %d chars at position %d",
|
||||
file_modified, "restored",
|
||||
undo_stack_tail->length, undo_stack_tail->start);
|
||||
break;
|
||||
case UNDO_INS:
|
||||
case UNDO_INS_CHAIN:
|
||||
// delete what was inserted
|
||||
u_start = undo_stack_tail->start + text;
|
||||
u_end = u_start - 1 + undo_stack_tail->length;
|
||||
text_hole_delete(u_start, u_end, NO_UNDO);
|
||||
status_line("Undo [%d] %s %d chars at position %d",
|
||||
file_modified, "deleted",
|
||||
undo_stack_tail->length, undo_stack_tail->start);
|
||||
break;
|
||||
}
|
||||
// For chained operations, continue popping all the way down the chain.
|
||||
// If this is the end of a chain, lower modification count and refresh display
|
||||
switch (undo_stack_tail->u_type) {
|
||||
case UNDO_DEL:
|
||||
case UNDO_INS:
|
||||
dot = (text + undo_stack_tail->start);
|
||||
refresh(FALSE);
|
||||
break;
|
||||
case UNDO_DEL_CHAIN:
|
||||
case UNDO_INS_CHAIN:
|
||||
repeat = 1;
|
||||
break;
|
||||
}
|
||||
// Deallocate the undo object we just processed
|
||||
undo_temp = undo_stack_tail->prev;
|
||||
free(undo_stack_tail);
|
||||
undo_stack_tail = undo_temp;
|
||||
file_modified--;
|
||||
if (repeat == 1) {
|
||||
undo_pop(); // Follow the undo chain if one exists
|
||||
}
|
||||
}
|
||||
|
||||
#if ENABLE_FEATURE_VI_UNDO_QUEUE
|
||||
static void undo_queue_commit(void) // Flush any queued objects to the undo stack
|
||||
{
|
||||
// Pushes the queue object onto the undo stack
|
||||
if (undo_q > 0) {
|
||||
// Deleted character undo events grow from the end
|
||||
undo_push((undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q),
|
||||
undo_q,
|
||||
(undo_queue_state | UNDO_USE_SPOS)
|
||||
);
|
||||
undo_queue_state = UNDO_EMPTY;
|
||||
undo_q = 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* ENABLE_FEATURE_VI_UNDO */
|
||||
|
||||
// open a hole in text[]
|
||||
// might reallocate text[]! use p += text_hole_make(p, ...),
|
||||
// and be careful to not use pointers into potentially freed text[]!
|
||||
@ -2082,12 +2415,12 @@ static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte
|
||||
}
|
||||
memmove(p + size, p, end - size - p);
|
||||
memset(p, ' ', size); // clear new hole
|
||||
file_modified++;
|
||||
return bias;
|
||||
}
|
||||
|
||||
// close a hole in text[]
|
||||
static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
|
||||
// "undo" value indicates if this operation should be undo-able
|
||||
static char *text_hole_delete(char *p, char *q, int undo) // delete "p" through "q", inclusive
|
||||
{
|
||||
char *src, *dest;
|
||||
int cnt, hole_size;
|
||||
@ -2102,10 +2435,29 @@ static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclu
|
||||
}
|
||||
hole_size = q - p + 1;
|
||||
cnt = end - src;
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
switch (undo) {
|
||||
case NO_UNDO:
|
||||
break;
|
||||
case ALLOW_UNDO:
|
||||
undo_push(p, hole_size, UNDO_DEL);
|
||||
break;
|
||||
case ALLOW_UNDO_CHAIN:
|
||||
undo_push(p, hole_size, UNDO_DEL_CHAIN);
|
||||
break;
|
||||
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
||||
case ALLOW_UNDO_QUEUED:
|
||||
undo_push(p, hole_size, UNDO_DEL_QUEUED);
|
||||
break;
|
||||
# endif
|
||||
}
|
||||
file_modified--;
|
||||
#endif
|
||||
if (src < text || src > end)
|
||||
goto thd0;
|
||||
if (dest < text || dest >= end)
|
||||
goto thd0;
|
||||
file_modified++;
|
||||
if (src >= end)
|
||||
goto thd_atend; // just delete the end of the buffer
|
||||
memmove(dest, src, cnt);
|
||||
@ -2115,7 +2467,6 @@ static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclu
|
||||
dest = end - 1; // make sure dest in below end-1
|
||||
if (end <= text)
|
||||
dest = end = text; // keep pointers valid
|
||||
file_modified++;
|
||||
thd0:
|
||||
return dest;
|
||||
}
|
||||
@ -2123,7 +2474,7 @@ static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclu
|
||||
// copy text into register, then delete text.
|
||||
// if dist <= 0, do not include, or go past, a NewLine
|
||||
//
|
||||
static char *yank_delete(char *start, char *stop, int dist, int yf)
|
||||
static char *yank_delete(char *start, char *stop, int dist, int yf, int undo)
|
||||
{
|
||||
char *p;
|
||||
|
||||
@ -2152,7 +2503,7 @@ static char *yank_delete(char *start, char *stop, int dist, int yf)
|
||||
text_yank(start, stop, YDreg);
|
||||
#endif
|
||||
if (yf == YANKDEL) {
|
||||
p = text_hole_delete(start, stop);
|
||||
p = text_hole_delete(start, stop, undo);
|
||||
} // delete lines
|
||||
return p;
|
||||
}
|
||||
@ -2218,12 +2569,22 @@ static void end_cmd_q(void)
|
||||
|| ENABLE_FEATURE_VI_CRASHME
|
||||
// might reallocate text[]! use p += string_insert(p, ...),
|
||||
// and be careful to not use pointers into potentially freed text[]!
|
||||
static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
|
||||
static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p'
|
||||
{
|
||||
uintptr_t bias;
|
||||
int i;
|
||||
|
||||
i = strlen(s);
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
switch (undo) {
|
||||
case ALLOW_UNDO:
|
||||
undo_push(p, i, UNDO_INS);
|
||||
break;
|
||||
case ALLOW_UNDO_CHAIN:
|
||||
undo_push(p, i, UNDO_INS_CHAIN);
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
bias = text_hole_make(p, i);
|
||||
p += bias;
|
||||
memcpy(p, s, i);
|
||||
@ -2516,14 +2877,14 @@ static int file_insert(const char *fn, char *p, int update_ro_status)
|
||||
cnt = safe_read(fd, p, size);
|
||||
if (cnt < 0) {
|
||||
status_line_bold_errno(fn);
|
||||
p = text_hole_delete(p, p + size - 1); // un-do buffer insert
|
||||
p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert
|
||||
} else if (cnt < size) {
|
||||
// There was a partial read, shrink unused space text[]
|
||||
p = text_hole_delete(p + cnt, p + size - 1); // un-do buffer insert
|
||||
p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO); // un-do buffer insert
|
||||
status_line_bold("can't read '%s'", fn);
|
||||
}
|
||||
if (cnt >= size)
|
||||
file_modified++;
|
||||
// if (cnt >= size)
|
||||
// file_modified++;
|
||||
close(fd);
|
||||
fi0:
|
||||
#if ENABLE_FEATURE_VI_READONLY
|
||||
@ -3048,11 +3409,12 @@ static void do_cmd(int c)
|
||||
if (*dot == '\n') {
|
||||
// don't Replace past E-o-l
|
||||
cmd_mode = 1; // convert to insert
|
||||
undo_queue_commit();
|
||||
} else {
|
||||
if (1 <= c || Isprint(c)) {
|
||||
if (c != 27)
|
||||
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
||||
dot = char_insert(dot, c); // insert new char
|
||||
dot = yank_delete(dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete char
|
||||
dot = char_insert(dot, c, ALLOW_UNDO_CHAIN); // insert new char
|
||||
}
|
||||
goto dc1;
|
||||
}
|
||||
@ -3062,7 +3424,7 @@ static void do_cmd(int c)
|
||||
if (c == KEYCODE_INSERT) goto dc5;
|
||||
// insert the char c at "dot"
|
||||
if (1 <= c || Isprint(c)) {
|
||||
dot = char_insert(dot, c);
|
||||
dot = char_insert(dot, c, ALLOW_UNDO_QUEUED);
|
||||
}
|
||||
goto dc1;
|
||||
}
|
||||
@ -3108,7 +3470,6 @@ static void do_cmd(int c)
|
||||
//case ']': // ]-
|
||||
//case '_': // _-
|
||||
//case '`': // `-
|
||||
//case 'u': // u- FIXME- there is no undo
|
||||
//case 'v': // v-
|
||||
default: // unrecognized command
|
||||
buf[0] = c;
|
||||
@ -3177,6 +3538,7 @@ static void do_cmd(int c)
|
||||
if (cmd_mode == 0)
|
||||
indicate_error(c);
|
||||
cmd_mode = 0; // stop insrting
|
||||
undo_queue_commit();
|
||||
end_cmd_q();
|
||||
last_status_cksum = 0; // force status update
|
||||
break;
|
||||
@ -3251,15 +3613,20 @@ static void do_cmd(int c)
|
||||
if (c == 'p')
|
||||
dot_right(); // move to right, can move to NL
|
||||
}
|
||||
string_insert(dot, p); // insert the string
|
||||
string_insert(dot, p, ALLOW_UNDO); // insert the string
|
||||
end_cmd_q(); // stop adding to q
|
||||
break;
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
case 'u': // u- undo last operation
|
||||
undo_pop();
|
||||
break;
|
||||
#endif
|
||||
case 'U': // U- Undo; replace current line with original version
|
||||
if (reg[Ureg] != NULL) {
|
||||
p = begin_line(dot);
|
||||
q = end_line(dot);
|
||||
p = text_hole_delete(p, q); // delete cur line
|
||||
p += string_insert(p, reg[Ureg]); // insert orig line
|
||||
p = text_hole_delete(p, q, ALLOW_UNDO); // delete cur line
|
||||
p += string_insert(p, reg[Ureg], ALLOW_UNDO_CHAIN); // insert orig line
|
||||
dot = p;
|
||||
dot_skip_over_ws();
|
||||
}
|
||||
@ -3485,7 +3852,7 @@ static void do_cmd(int c)
|
||||
cnt = count_lines(text, dot); // remember what line we are on
|
||||
c1 = get_one_char(); // get the type of thing to delete
|
||||
find_range(&p, &q, c1);
|
||||
yank_delete(p, q, 1, YANKONLY); // save copy before change
|
||||
yank_delete(p, q, 1, YANKONLY, NO_UNDO); // save copy before change
|
||||
p = begin_line(p);
|
||||
q = end_line(q);
|
||||
i = count_lines(p, q); // # of lines we are shifting
|
||||
@ -3494,16 +3861,16 @@ static void do_cmd(int c)
|
||||
// shift left- remove tab or 8 spaces
|
||||
if (*p == '\t') {
|
||||
// shrink buffer 1 char
|
||||
text_hole_delete(p, p);
|
||||
text_hole_delete(p, p, NO_UNDO);
|
||||
} else if (*p == ' ') {
|
||||
// we should be calculating columns, not just SPACE
|
||||
for (j = 0; *p == ' ' && j < tabstop; j++) {
|
||||
text_hole_delete(p, p);
|
||||
text_hole_delete(p, p, NO_UNDO);
|
||||
}
|
||||
}
|
||||
} else if (c == '>') {
|
||||
// shift right -- add tab or 8 spaces
|
||||
char_insert(p, '\t');
|
||||
char_insert(p, '\t', ALLOW_UNDO);
|
||||
}
|
||||
}
|
||||
dot = find_line(cnt); // what line were we on
|
||||
@ -3538,7 +3905,7 @@ static void do_cmd(int c)
|
||||
save_dot = dot;
|
||||
dot = dollar_line(dot); // move to before NL
|
||||
// copy text into a register and delete
|
||||
dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
|
||||
dot = yank_delete(save_dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete to e-o-l
|
||||
if (c == 'C')
|
||||
goto dc_i; // start inserting
|
||||
#if ENABLE_FEATURE_VI_DOT_CMD
|
||||
@ -3583,15 +3950,22 @@ static void do_cmd(int c)
|
||||
case KEYCODE_INSERT: // Cursor Key Insert
|
||||
dc_i:
|
||||
cmd_mode = 1; // start inserting
|
||||
undo_queue_commit(); // commit queue when cmd_mode changes
|
||||
break;
|
||||
case 'J': // J- join current and next lines together
|
||||
do {
|
||||
dot_end(); // move to NL
|
||||
if (dot < end - 1) { // make sure not last char in text[]
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
undo_push(dot, 1, UNDO_DEL);
|
||||
*dot++ = ' '; // replace NL with space
|
||||
undo_push((dot - 1), 1, UNDO_INS_CHAIN);
|
||||
#else
|
||||
*dot++ = ' ';
|
||||
file_modified++;
|
||||
#endif
|
||||
while (isblank(*dot)) { // delete leading WS
|
||||
dot_delete();
|
||||
text_hole_delete(dot, dot, ALLOW_UNDO_CHAIN);
|
||||
}
|
||||
}
|
||||
} while (--cmdcnt > 0);
|
||||
@ -3620,10 +3994,10 @@ static void do_cmd(int c)
|
||||
dot_prev();
|
||||
case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
|
||||
dot_end();
|
||||
dot = char_insert(dot, '\n');
|
||||
dot = char_insert(dot, '\n', ALLOW_UNDO);
|
||||
} else {
|
||||
dot_begin(); // 0
|
||||
dot = char_insert(dot, '\n'); // i\n ESC
|
||||
dot = char_insert(dot, '\n', ALLOW_UNDO); // i\n ESC
|
||||
dot_prev(); // -
|
||||
}
|
||||
goto dc_i;
|
||||
@ -3631,6 +4005,7 @@ static void do_cmd(int c)
|
||||
case 'R': // R- continuous Replace char
|
||||
dc5:
|
||||
cmd_mode = 2;
|
||||
undo_queue_commit();
|
||||
break;
|
||||
case KEYCODE_DELETE:
|
||||
c = 'x';
|
||||
@ -3645,7 +4020,7 @@ static void do_cmd(int c)
|
||||
if (dot[dir] != '\n') {
|
||||
if (c == 'X')
|
||||
dot--; // delete prev char
|
||||
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
||||
dot = yank_delete(dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete char
|
||||
}
|
||||
} while (--cmdcnt > 0);
|
||||
end_cmd_q(); // stop adding to q
|
||||
@ -3716,6 +4091,7 @@ static void do_cmd(int c)
|
||||
c1 = get_one_char(); // get the type of thing to delete
|
||||
// determine range, and whether it spans lines
|
||||
ml = find_range(&p, &q, c1);
|
||||
place_cursor(0, 0);
|
||||
if (c1 == 27) { // ESC- user changed mind and wants out
|
||||
c = c1 = 27; // Escape- do nothing
|
||||
} else if (strchr("wW", c1)) {
|
||||
@ -3727,13 +4103,13 @@ static void do_cmd(int c)
|
||||
q--;
|
||||
}
|
||||
}
|
||||
dot = yank_delete(p, q, ml, yf); // delete word
|
||||
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete word
|
||||
} else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
|
||||
// partial line copy text into a register and delete
|
||||
dot = yank_delete(p, q, ml, yf); // delete word
|
||||
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete word
|
||||
} else if (strchr("cdykjHL+-{}\r\n", c1)) {
|
||||
// whole line copy text into a register and delete
|
||||
dot = yank_delete(p, q, ml, yf); // delete lines
|
||||
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete lines
|
||||
whole = 1;
|
||||
} else {
|
||||
// could not recognize object
|
||||
@ -3743,7 +4119,7 @@ static void do_cmd(int c)
|
||||
}
|
||||
if (ml && whole) {
|
||||
if (c == 'c') {
|
||||
dot = char_insert(dot, '\n');
|
||||
dot = char_insert(dot, '\n', ALLOW_UNDO_CHAIN);
|
||||
// on the last line of file don't move to prev line
|
||||
if (whole && dot != (end-1)) {
|
||||
dot_prev();
|
||||
@ -3789,8 +4165,14 @@ static void do_cmd(int c)
|
||||
case 'r': // r- replace the current char with user input
|
||||
c1 = get_one_char(); // get the replacement char
|
||||
if (*dot != '\n') {
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
undo_push(dot, 1, UNDO_DEL);
|
||||
*dot = c1;
|
||||
undo_push(dot, 1, UNDO_INS_CHAIN);
|
||||
#else
|
||||
*dot = c1;
|
||||
file_modified++;
|
||||
#endif
|
||||
}
|
||||
end_cmd_q(); // stop adding to q
|
||||
break;
|
||||
@ -3830,6 +4212,17 @@ static void do_cmd(int c)
|
||||
break;
|
||||
case '~': // ~- flip the case of letters a-z -> A-Z
|
||||
do {
|
||||
#if ENABLE_FEATURE_VI_UNDO
|
||||
if (islower(*dot)) {
|
||||
undo_push(dot, 1, UNDO_DEL);
|
||||
*dot = toupper(*dot);
|
||||
undo_push(dot, 1, UNDO_INS_CHAIN);
|
||||
} else if (isupper(*dot)) {
|
||||
undo_push(dot, 1, UNDO_DEL);
|
||||
*dot = tolower(*dot);
|
||||
undo_push(dot, 1, UNDO_INS_CHAIN);
|
||||
}
|
||||
#else
|
||||
if (islower(*dot)) {
|
||||
*dot = toupper(*dot);
|
||||
file_modified++;
|
||||
@ -3837,6 +4230,7 @@ static void do_cmd(int c)
|
||||
*dot = tolower(*dot);
|
||||
file_modified++;
|
||||
}
|
||||
#endif
|
||||
dot_right();
|
||||
} while (--cmdcnt > 0);
|
||||
end_cmd_q(); // stop adding to q
|
||||
@ -3866,7 +4260,7 @@ static void do_cmd(int c)
|
||||
dc1:
|
||||
// if text[] just became empty, add back an empty line
|
||||
if (end == text) {
|
||||
char_insert(text, '\n'); // start empty buf with dummy line
|
||||
char_insert(text, '\n', NO_UNDO); // start empty buf with dummy line
|
||||
dot = text;
|
||||
}
|
||||
// it is OK for dot to exactly equal to end, otherwise check dot validity
|
||||
|
||||
Loading…
Reference in New Issue
Block a user