ui/gtk/webview.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2025 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "toolkit.h"
#include "container.h"

#include "webview.h"
#include "widget.h"

#ifdef UI_WEBVIEW

UIWIDGET ui_webview_create(UiObject *obj, UiWebviewArgs *args) {
    GtkWidget *webview = webkit_web_view_new();
    
    ui_set_name_and_style(webview, args->name, args->style_class);
    
    ui_widget_size_request(webview, args->width, args->height);
    
    UiVar *var = uic_widget_var(obj->ctx, obj->ctx, args->value, args->varname, UI_VAR_GENERIC);
    if(var) {
        WebViewData *data = malloc(sizeof(WebViewData));
        memset(data, 0, sizeof(WebViewData));
        data->webview = WEBKIT_WEB_VIEW(webview);
        WebKitSettings *settings = webkit_web_view_get_settings(data->webview);
        data->javascript = webkit_settings_get_enable_javascript(settings);
        data->zoom = webkit_web_view_get_zoom_level(data->webview);
        
        UiGeneric *value = var->value;
        value->get = ui_webview_get;
        value->get_type = ui_webview_get_type;
        value->set = ui_webview_set;
        value->obj = data;
        if(value->value && value->type && !strcmp(value->type, UI_WEBVIEW_OBJECT_TYPE)) {
            ui_webview_set(value, value->value, UI_WEBVIEW_OBJECT_TYPE);
        }
    }
    
    ui_set_widget_states(obj->ctx, webview, args->states);
    UiContainerPrivate *ct = (UiContainerPrivate*)obj->container_end;
    UiLayout layout = UI_ARGS2LAYOUT(args);
    ct->add(ct, webview, &layout);
    
    return webview;
}

void* ui_webview_get(UiGeneric *g) {
    return g->value;
}

const char* ui_webview_get_type(UiGeneric *g) {
    return UI_WEBVIEW_OBJECT_TYPE;
}

int ui_webview_set(UiGeneric *g, void *value, const char *type) {
    if(!type || strcmp(type, UI_WEBVIEW_OBJECT_TYPE)) {
        return 1;
    }
    
    WebViewData *obj = g->obj;
    if(!obj->webview) {
        return 1;
    }
    
    WebViewData *data = value;
    if(data->type == WEBVIEW_CONTENT_URL) {
        webkit_web_view_load_uri(obj->webview, data->uri);
    } else {
        if(!data->content) {
            return 1;
        }
        
        GBytes *bytes = g_bytes_new(data->content, data->contentlength);
        webkit_web_view_load_bytes(obj->webview, bytes, data->mimetype, data->encoding, data->uri);
    }
    
    ui_webview_enable_javascript(g, data->javascript);
    ui_webview_set_zoom(g, data->zoom);
    
    return 0;
}

void ui_webview_load_url(UiGeneric *g, const char *url) {
    WebViewData data = { .uri = (char*)url, .type = WEBVIEW_CONTENT_URL, .javascript = TRUE, .zoom = 1 };
    g->set(g, &data, UI_WEBVIEW_OBJECT_TYPE);
}

void ui_webview_load_content(
        UiGeneric *g,
        const char *uri,
        const char *content,
        size_t contentlength,
        const char *mimetype,
        const char *encoding)
{
    WebViewData *data0 = g->obj;
    if(!data0) {
        return;
    }
    
    WebViewData data;
    memset(&data, 0, sizeof(WebViewData));
    data.webview = data0->webview;
    data.uri = (char*)uri;
    data.content = (char*)content;
    data.contentlength = contentlength;
    data.mimetype = (char*)mimetype;
    data.encoding = (char*)encoding;
    data.type = WEBVIEW_CONTENT_CONTENT;
    data.javascript = FALSE;
    data.zoom = 1;
    g->set(g, &data, UI_WEBVIEW_OBJECT_TYPE);
}

void ui_webview_reload(UiGeneric *g) {
    WebViewData *webview = g->obj;
    webkit_web_view_reload(webview->webview);
}

UiBool ui_webview_can_go_back(UiGeneric *g) {
    WebViewData *webview = g->obj;
    return webkit_web_view_can_go_back(webview->webview);
}

UiBool ui_webview_can_go_forward(UiGeneric *g) {
    WebViewData *webview = g->obj;
    return webkit_web_view_can_go_forward(webview->webview);
}

void ui_webview_go_back(UiGeneric *g) {
    WebViewData *webview = g->obj;
    webkit_web_view_go_back(webview->webview);
}

void ui_webview_go_forward(UiGeneric *g) {
    WebViewData *webview = g->obj;
    webkit_web_view_go_forward(webview->webview);
}

const char* ui_webview_get_uri(UiGeneric *g) {
    WebViewData *webview = g->obj;
    return webkit_web_view_get_uri(webview->webview);
}

void ui_webview_enable_javascript(UiGeneric *g, UiBool enable) {
    WebViewData *webview = g->obj;
    WebKitSettings *settings = webkit_web_view_get_settings(webview->webview);
    webkit_settings_set_enable_javascript(settings, enable);
}

void ui_webview_set_zoom(UiGeneric *g, double zoom) {
    WebViewData *webview = g->obj;
    webkit_web_view_set_zoom_level(webview->webview, zoom);
    webview->zoom = zoom;
}

double ui_webview_get_zoom(UiGeneric *g) {
    WebViewData *webview = g->obj;
    webview->zoom = webkit_web_view_get_zoom_level(webview->webview);
    return webview->zoom;
}


#endif