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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* Copyright © 2003 Christian Persch
*
* This file is part of Epiphany.
*
* Epiphany is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Epiphany is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Epiphany. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib.h>
#include "ephy-prefs.h"
#include "ephy-settings.h"
#include "ephy-zoom.h"
#define NUM_ZOOM_STEPS 14
static float
zoom_steps [NUM_ZOOM_STEPS] = {
0.30f,
0.50f,
0.67f,
0.80f,
0.90f,
1.00f,
1.10f,
1.20f,
1.33f,
1.50f,
1.70f,
2.00f,
2.40f,
3.00f
};
float
ephy_zoom_get_changed_zoom_level (float level,
int steps)
{
float new_level;
gint i;
for (i = 0; i < NUM_ZOOM_STEPS; i++) {
if (zoom_steps[i] == level)
break;
}
if (i == NUM_ZOOM_STEPS) {
/* No exact step found, try to find the nearest value */
for (i = 0; i < NUM_ZOOM_STEPS - 1; i++) {
if (zoom_steps[i] < level && zoom_steps[i + 1] > level)
break;
}
}
if (i == NUM_ZOOM_STEPS) {
/* Still no match? Return default */
return g_settings_get_double (EPHY_SETTINGS_WEB, EPHY_PREFS_WEB_DEFAULT_ZOOM_LEVEL);
}
if (steps == -1 && i > 0) {
new_level = zoom_steps[i - 1];
} else if (steps == 1 && i < NUM_ZOOM_STEPS - 1) {
new_level = zoom_steps[i + 1];
} else {
/* Ensure that we have a consistent value */
new_level = level;
}
return new_level;
}
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