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decoration: stack: stacks multiple decorations on top of each other

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This commit is contained in:
Daniel Eklöf 2018-12-26 15:59:48 +01:00
parent 09cd27b688
commit a745436ee2
4 changed files with 78 additions and 1 deletions
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45
decorations/stack.c Normal file
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#include "underline.h"
#include <stdlib.h>
struct private {
struct deco **decos;
size_t count;
};
static void
destroy(struct deco *deco)
{
struct private *d = deco->private;
for (size_t i = 0; i < d->count; i++)
d->decos[i]->destroy(d->decos[i]);
free(d->decos);
free(d);
free(deco);
}
static void
expose(const struct deco *deco, cairo_t *cr, int x, int y, int width, int height)
{
const struct private *d = deco->private;
for (size_t i = 0; i < d->count; i++)
d->decos[i]->expose(d->decos[i], cr, x, y, width, height);
}
struct deco *
deco_stack(struct deco *decos[], size_t count)
{
struct private *priv = malloc(sizeof(*priv));
priv->decos = malloc(count * sizeof(priv->decos[0]));
priv->count = count;
for (size_t i = 0; i < count; i++)
priv->decos[i] = decos[i];
struct deco *deco = malloc(sizeof(*deco));
deco->private = priv;
deco->expose = &expose;
deco->destroy = &destroy;
return deco;
}

6
decorations/stack.h Normal file
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#pragma once
#include "../color.h"
#include "../decoration.h"
struct deco *deco_stack(struct deco *decos[], size_t count);