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Move all window-title management into Terminal.

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Previously, window title management happened in a bipartisan sort of
way: front ends would choose their initial window title once they knew
what host name they were connecting to, but then Terminal would
override that later if the server set the window title by escape
sequences.

Now it's all done the same way round: the Terminal object is always
where titles are invented, and they only propagate in one direction,
from the Terminal to the TermWin.

This allows us to avoid duplicating in multiple front ends the logic
for what the initial window title should be. The frontend just has to
make one initial call to term_setup_window_titles, to tell the
terminal what hostname should go in the default title (if the Conf
doesn't override even that). Thereafter, all it has to do is respond
to the TermWin title-setting methods.

Similarly, the logic that handles window-title changes as a result of
the Change Settings dialog is also centralised into terminal.c. This
involved introducing an extra term_pre_reconfig() call that each
frontend can call to modify the Conf that will be used for the GUI
configurer; that's where the code now lives that copies the current
window title into there. (This also means that GTK PuTTY now behaves
consistently with Windows PuTTY on that point; GTK's previous
behaviour was less well thought out.)

It also means there's no longer any need for Terminal to talk to the
front end when a remote query wants to _find out_ the window title:
the Terminal knows the answer already. So TermWin's get_title method
can go.
This commit is contained in:
Simon Tatham
2021-02-07 19:59:20 +00:00
parent 45b03419fd
commit 42ad454f4f
9 changed files with 65 additions and 96 deletions
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5
putty.h
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@ -1149,7 +1149,6 @@ struct TermWinVtable {
void (*get_pos)(TermWin *, int *x, int *y);
void (*get_pixels)(TermWin *, int *x, int *y);
const char *(*get_title)(TermWin *, bool icon);
};
static inline bool win_setup_draw_ctx(TermWin *win)
@ -1210,8 +1209,6 @@ static inline void win_get_pos(TermWin *win, int *x, int *y)
{ win->vt->get_pos(win, x, y); }
static inline void win_get_pixels(TermWin *win, int *x, int *y)
{ win->vt->get_pixels(win, x, y); }
static inline const char *win_get_title(TermWin *win, bool icon)
{ return win->vt->get_title(win, icon); }
/*
* Global functions not specific to a connection instance.
@ -1625,6 +1622,7 @@ void term_blink(Terminal *, bool set_cursor);
void term_do_paste(Terminal *, const wchar_t *, int);
void term_nopaste(Terminal *);
void term_copyall(Terminal *, const int *, int);
void term_pre_reconfig(Terminal *, Conf *);
void term_reconfig(Terminal *, Conf *);
void term_request_copy(Terminal *, const int *clipboards, int n_clipboards);
void term_request_paste(Terminal *, int clipboard);
@ -1639,6 +1637,7 @@ void term_set_trust_status(Terminal *term, bool trusted);
void term_keyinput(Terminal *, int codepage, const void *buf, int len);
void term_keyinputw(Terminal *, const wchar_t * widebuf, int len);
void term_get_cursor_position(Terminal *term, int *x, int *y);
void term_setup_window_titles(Terminal *term, const char *title_hostname);
typedef enum SmallKeypadKey {
SKK_HOME, SKK_END, SKK_INSERT, SKK_DELETE, SKK_PGUP, SKK_PGDN,