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config: add ‘font-size-adjustment=N[px|%]’ option

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This patch adds a new config option, font-size-adjustment.

It lets you configure how much the font size should be
incremented/decremented when zooming in or out (ctrl-+, ctrl+-).

Values can be specified in points, pixels or percent.

Closes #1188
This commit is contained in:
Daniel Eklöf 2022-12-15 11:10:32 +01:00
parent 7bb5c80d04
commit f6ca8c90e1
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GPG key ID: 5BBD4992C116573F
6 changed files with 120 additions and 19 deletions
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26
config.c
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@ -925,6 +925,31 @@ parse_section_main(struct context *ctx)
return true;
}
else if (strcmp(key, "font-size-adjustment") == 0) {
const size_t len = strlen(ctx->value);
if (len >= 1 && ctx->value[len - 1] == '%') {
errno = 0;
char *end = NULL;
float percent = strtof(ctx->value, &end);
if (!(errno == 0 && end == ctx->value + len - 1)) {
LOG_CONTEXTUAL_ERR(
"invalid percent value (must be in the form 10.5%%)");
return false;
}
conf->font_size_adjustment.percent = percent / 100.;
conf->font_size_adjustment.pt_or_px.pt = 0;
conf->font_size_adjustment.pt_or_px.px = 0;
return true;
} else {
bool ret = value_to_pt_or_px(ctx, &conf->font_size_adjustment.pt_or_px);
if (ret)
conf->font_size_adjustment.percent = 0.;
return ret;
}
}
else if (strcmp(key, "line-height") == 0)
return value_to_pt_or_px(ctx, &conf->line_height);
@ -2886,6 +2911,7 @@ config_load(struct config *conf, const char *conf_path,
},
.startup_mode = STARTUP_WINDOWED,
.fonts = {{0}},
.font_size_adjustment = {.percent = 0., .pt_or_px = {.pt = 0.5, .px = 0}},
.line_height = {.pt = 0, .px = -1},
.letter_spacing = {.pt = 0, .px = 0},
.horizontal_letter_offset = {.pt = 0, .px = 0},