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Match gnome-terminal with its font scaling logic

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Gnome terminal jumps between a predefined set of font scales. libvte seems
to break if we try to jump in between them. This behaviour is an exact
match from what you get in gnome-terminal (and certainly looks
considerably better).

Relevant to issue #195.
Closes #194 since it no longer crashes.
Probably a proper fix (finally) for #47.
This commit is contained in:
Simon Gomizelj 2014-11-10 20:45:02 -05:00
parent bed98f83e8
commit e2c9769f38
1 changed files with 49 additions and 4 deletions
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53
termite.cc
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@ -39,6 +39,34 @@
using namespace std::placeholders; using namespace std::placeholders;
/* Allow scales a bit smaller and a bit larger than the usual pango ranges */
#define TERMINAL_SCALE_XXX_SMALL (PANGO_SCALE_XX_SMALL/1.2)
#define TERMINAL_SCALE_XXXX_SMALL (TERMINAL_SCALE_XXX_SMALL/1.2)
#define TERMINAL_SCALE_XXXXX_SMALL (TERMINAL_SCALE_XXXX_SMALL/1.2)
#define TERMINAL_SCALE_XXX_LARGE (PANGO_SCALE_XX_LARGE*1.2)
#define TERMINAL_SCALE_XXXX_LARGE (TERMINAL_SCALE_XXX_LARGE*1.2)
#define TERMINAL_SCALE_XXXXX_LARGE (TERMINAL_SCALE_XXXX_LARGE*1.2)
#define TERMINAL_SCALE_MINIMUM (TERMINAL_SCALE_XXXXX_SMALL/1.2)
#define TERMINAL_SCALE_MAXIMUM (TERMINAL_SCALE_XXXXX_LARGE*1.2)
static const std::vector<double> zoom_factors = {
TERMINAL_SCALE_MINIMUM,
TERMINAL_SCALE_XXXXX_SMALL,
TERMINAL_SCALE_XXXX_SMALL,
TERMINAL_SCALE_XXX_SMALL,
PANGO_SCALE_XX_SMALL,
PANGO_SCALE_X_SMALL,
PANGO_SCALE_SMALL,
PANGO_SCALE_MEDIUM,
PANGO_SCALE_LARGE,
PANGO_SCALE_X_LARGE,
PANGO_SCALE_XX_LARGE,
TERMINAL_SCALE_XXX_LARGE,
TERMINAL_SCALE_XXXX_LARGE,
TERMINAL_SCALE_XXXXX_LARGE,
TERMINAL_SCALE_MAXIMUM
};
enum class overlay_mode { enum class overlay_mode {
hidden, hidden,
search, search,
@ -640,9 +668,26 @@ void window_title_cb(VteTerminal *vte, gboolean *dynamic_title) {
title ? title : "termite"); title ? title : "termite");
} }
static void update_font_scale(VteTerminal *vte, gdouble update) { static void increase_font_scale(VteTerminal *vte) {
gdouble scale = vte_terminal_get_font_scale(vte); gdouble scale = vte_terminal_get_font_scale(vte);
vte_terminal_set_font_scale(vte, scale + update);
for (auto factor : zoom_factors) {
if ((factor - scale) > 1e-6) {
vte_terminal_set_font_scale(vte, factor);
return;
}
}
}
static void decrease_font_scale(VteTerminal *vte) {
gdouble scale = vte_terminal_get_font_scale(vte);
for (auto factor : zoom_factors) {
if ((scale - factor) > 1e-6) {
vte_terminal_set_font_scale(vte, factor);
return;
}
}
} }
gboolean window_state_cb(GtkWindow *, GdkEventWindowState *event, keybind_info *info) { gboolean window_state_cb(GtkWindow *, GdkEventWindowState *event, keybind_info *info) {
@ -797,10 +842,10 @@ gboolean key_press_cb(VteTerminal *vte, GdkEventKey *event, keybind_info *info)
overlay_show(&info->panel, overlay_mode::urlselect, nullptr); overlay_show(&info->panel, overlay_mode::urlselect, nullptr);
break; break;
case GDK_KEY_plus: case GDK_KEY_plus:
update_font_scale(vte, 0.1); increase_font_scale(vte);
break; break;
case GDK_KEY_minus: case GDK_KEY_minus:
update_font_scale(vte, -0.1); decrease_font_scale(vte);
break; break;
} }
return TRUE; return TRUE;