config.c

/*
 * config.c - the platform-independent parts of the PuTTY
 * configuration box.
 */

#include <assert.h>
#include <stdlib.h>

#include "putty.h"
#include "dialog.h"
#include "storage.h"

#define PRINTER_DISABLED_STRING "None (printing disabled)"

#define HOST_BOX_TITLE "Host Name (or IP address)"
#define PORT_BOX_TITLE "Port"

void conf_radiobutton_handler(union control *ctrl, dlgparam *dlg,
                              void *data, int event)
{
    int button;
    Conf *conf = (Conf *)data;

    /*
     * For a standard radio button set, the context parameter gives
     * the primary key (CONF_foo), and the extra data per button
     * gives the value the target field should take if that button
     * is the one selected.
     */
    if (event == EVENT_REFRESH) {
        int val = conf_get_int(conf, ctrl->radio.context.i);
        for (button = 0; button < ctrl->radio.nbuttons; button++)
            if (val == ctrl->radio.buttondata[button].i)
                break;
        /* We expected that `break' to happen, in all circumstances. */
        assert(button < ctrl->radio.nbuttons);
        dlg_radiobutton_set(ctrl, dlg, button);
    } else if (event == EVENT_VALCHANGE) {
        button = dlg_radiobutton_get(ctrl, dlg);
        assert(button >= 0 && button < ctrl->radio.nbuttons);
        conf_set_int(conf, ctrl->radio.context.i,
                     ctrl->radio.buttondata[button].i);
    }
}

void conf_radiobutton_bool_handler(union control *ctrl, dlgparam *dlg,
                                   void *data, int event)
{
    int button;
    Conf *conf = (Conf *)data;

    /*
     * Same as conf_radiobutton_handler, but using conf_set_bool in
     * place of conf_set_int, because it's dealing with a bool-typed
     * config option.
     */
    if (event == EVENT_REFRESH) {
        int val = conf_get_bool(conf, ctrl->radio.context.i);
        for (button = 0; button < ctrl->radio.nbuttons; button++)
            if (val == ctrl->radio.buttondata[button].i)
                break;
        /* We expected that `break' to happen, in all circumstances. */
        assert(button < ctrl->radio.nbuttons);
        dlg_radiobutton_set(ctrl, dlg, button);
    } else if (event == EVENT_VALCHANGE) {
        button = dlg_radiobutton_get(ctrl, dlg);
        assert(button >= 0 && button < ctrl->radio.nbuttons);
        conf_set_bool(conf, ctrl->radio.context.i,
                      ctrl->radio.buttondata[button].i);
    }
}

#define CHECKBOX_INVERT (1<<30)
void conf_checkbox_handler(union control *ctrl, dlgparam *dlg,
                           void *data, int event)
{
    int key;
    bool invert;
    Conf *conf = (Conf *)data;

    /*
     * For a standard checkbox, the context parameter gives the
     * primary key (CONF_foo), optionally ORed with CHECKBOX_INVERT.
     */
    key = ctrl->checkbox.context.i;
    if (key & CHECKBOX_INVERT) {
        key &= ~CHECKBOX_INVERT;
        invert = true;
    } else
        invert = false;

    /*
     * C lacks a logical XOR, so the following code uses the idiom
     * (!a ^ !b) to obtain the logical XOR of a and b. (That is, 1
     * iff exactly one of a and b is nonzero, otherwise 0.)
     */

    if (event == EVENT_REFRESH) {
        bool val = conf_get_bool(conf, key);
        dlg_checkbox_set(ctrl, dlg, (!val ^ !invert));
    } else if (event == EVENT_VALCHANGE) {
        conf_set_bool(conf, key, !dlg_checkbox_get(ctrl,dlg) ^ !invert);
    }
}

void conf_editbox_handler(union control *ctrl, dlgparam *dlg,
                          void *data, int event)
{
    /*
     * The standard edit-box handler expects the main `context'
     * field to contain the primary key. The secondary `context2'
     * field indicates the type of this field:
     *
     *  - if context2 > 0, the field is a string.
     *  - if context2 == -1, the field is an int and the edit box
     *    is numeric.
     *  - if context2 < -1, the field is an int and the edit box is
     *    _floating_, and (-context2) gives the scale. (E.g. if
     *    context2 == -1000, then typing 1.2 into the box will set
     *    the field to 1200.)
     */
    int key = ctrl->editbox.context.i;
    int length = ctrl->editbox.context2.i;
    Conf *conf = (Conf *)data;
    if (length > 0) {
        if (event == EVENT_REFRESH) {
            char *field = conf_get_str(conf, key);
            dlg_editbox_set(ctrl, dlg, field);
        } else if (event == EVENT_VALCHANGE) {
            char *field = dlg_editbox_get(ctrl, dlg);
            conf_set_str(conf, key, field);
            sfree(field);
        }
    } else if (length < 0) {
        if (event == EVENT_REFRESH) {
            char str[80];
            int value = conf_get_int(conf, key);
            if (length == -1)
                sprintf(str, "%d", value);
            else
                sprintf(str, "%g", (double)value / (double)(-length));
            dlg_editbox_set(ctrl, dlg, str);
        } else if (event == EVENT_VALCHANGE) {
            char *str = dlg_editbox_get(ctrl, dlg);
            if (length == -1)
                conf_set_int(conf, key, atoi(str));
            else
                conf_set_int(conf, key, (int)((-length) * atof(str)));
            sfree(str);
        }
    }
}

void conf_filesel_handler(union control *ctrl, dlgparam *dlg,
                          void *data, int event)
{
    int key = ctrl->fileselect.context.i;
    Conf *conf = (Conf *)data;

    if (event == EVENT_REFRESH) {
        dlg_filesel_set(
            ctrl, dlg, conf_get_filename(conf, key));
    } else if (event == EVENT_VALCHANGE) {
        Filename *filename = dlg_filesel_get(ctrl, dlg);
        conf_set_filename(conf, key, filename);
        filename_free(filename);
    }
}

void conf_fontsel_handler(union control *ctrl, dlgparam *dlg,
                          void *data, int event)
{
    int key = ctrl->fontselect.context.i;
    Conf *conf = (Conf *)data;

    if (event == EVENT_REFRESH) {
        dlg_fontsel_set(
            ctrl, dlg, conf_get_fontspec(conf, key));
    } else if (event == EVENT_VALCHANGE) {
        FontSpec *fontspec = dlg_fontsel_get(ctrl, dlg);
        conf_set_fontspec(conf, key, fontspec);
        fontspec_free(fontspec);
    }
}

static void config_host_handler(union control *ctrl, dlgparam *dlg,
                                void *data, int event)
{
    Conf *conf = (Conf *)data;

    /*
     * This function works just like the standard edit box handler,
     * only it has to choose the control's label and text from two
     * different places depending on the protocol.
     */
    if (event == EVENT_REFRESH) {
        if (conf_get_int(conf, CONF_protocol) == PROT_SERIAL) {
            /*
             * This label text is carefully chosen to contain an n,
             * since that's the shortcut for the host name control.