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fix(mouse): do not fetch clipboard twice when pasting with middle button #33494

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Problem:
When doing paste operation mouse code tries to figure out it it is
dealing with a multi-line register by calling yank_register_mline(),
which fetches register data and checks its type. Later the code calls
either do_put() or insert_reg() which fetch register data again. This is
unnoticeable when working with internal neovim registers, but starts
hurting when dealing with clipboards, especially remote one (forwarded X
or socket tunnel or similar).

Solution:
Change yank_register_mline() to also return pointer to the
register structure prepared for pasting, and insert_reg() to accept
such register pointer and use it if it is supplied. do_put() already
has support for accepting a register structure to be used for pasting.

Fixes #33493
This commit is contained in:
Dmitry Torokhov
2025-04-16 03:08:41 -07:00
committed by GitHub
parent 07d06dd396
commit 7432781e71
3 changed files with 23 additions and 12 deletions
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19
src/nvim/ops.c
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@@ -966,16 +966,23 @@ yankreg_T *copy_register(int name)
}
/// Check if the current yank register has kMTLineWise register type
bool yank_register_mline(int regname)
/// For valid, non-blackhole registers also provides pointer to the register
/// structure prepared for pasting.
///
/// @param regname The name of the register used or 0 for the unnamed register
/// @param reg Pointer to store yankreg_T* for the requested register. Will be
/// set to NULL for invalid or blackhole registers.
bool yank_register_mline(int regname, yankreg_T **reg)
{
*reg = NULL;
if (regname != 0 && !valid_yank_reg(regname, false)) {
return false;
}
if (regname == '_') { // black hole is always empty
return false;
}
yankreg_T *reg = get_yank_register(regname, YREG_PASTE);
return reg->y_type == kMTLineWise;
*reg = get_yank_register(regname, YREG_PASTE);
return (*reg)->y_type == kMTLineWise;
}
/// Start or stop recording into a yank register.
@@ -1322,7 +1329,7 @@ static int put_in_typebuf(char *s, bool esc, bool colon, int silent)
/// @param literally_arg insert literally, not as if typed
///
/// @return FAIL for failure, OK otherwise
int insert_reg(int regname, bool literally_arg)
int insert_reg(int regname, yankreg_T *reg, bool literally_arg)
{
int retval = OK;
bool allocated;
@@ -1353,7 +1360,9 @@ int insert_reg(int regname, bool literally_arg)
xfree(arg);
}
} else { // Name or number register.
yankreg_T *reg = get_yank_register(regname, YREG_PASTE);
if (reg == NULL) {
reg = get_yank_register(regname, YREG_PASTE);
}
if (reg->y_array == NULL) {
retval = FAIL;
} else {