2018년 11월 23일 금요일

[C#] WebView Example


1. WebView Example

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using System;
using System.Windows.Forms;
using System.Collections.Generic;

namespace CsLib
{
    class CsWebView
    {
        Panel panel;
        WebBrowser web;
        ToolStripTextBox addr;

        public CsWebView()
        {
            Initialize();
        }

        public CsWebView(Boolean toolbar)
        {
            Initialize();
            if (toolbar)
            {
                makeToolbar();
            }
        }
        private void Initialize()
        {
            web = new WebBrowser();
            web.Anchor = AnchorStyles.Top | AnchorStyles.Right | AnchorStyles.Bottom | AnchorStyles.Left;
            web.Dock = DockStyle.Fill;
            web.ScrollBarsEnabled = true;

            panel = new Panel();
            panel.Anchor = AnchorStyles.Top | AnchorStyles.Right | AnchorStyles.Bottom | AnchorStyles.Left;
            panel.Dock = DockStyle.Fill;
            panel.Controls.Add(web);
        }

        public Panel get()
        {
            return panel;
        }

        public ToolStripButton addToolbarButton(ToolStrip tool, String text, EventHandler handler)
        {
            ToolStripButton button = new ToolStripButton();
            button.Name = text;
            button.Text = text;
            button.Click += handler;
            tool.Items.Add(button);
            return button;
        }

        public ToolStripTextBox addToolbarTextBox(ToolStrip tool, String text, KeyEventHandler handler)
        {
            ToolStripTextBox textbox = new ToolStripTextBox();
            textbox.Name = text;
            textbox.Text = "";
            textbox.Anchor = AnchorStyles.Top | AnchorStyles.Right | AnchorStyles.Bottom | AnchorStyles.Left;
            textbox.Dock = DockStyle.Fill;
            if (handler != null)
            {
                textbox.KeyDown += handler;
            }
            tool.Items.Add(textbox);
            return textbox;
        }

        public void makeToolbar()
        {
            ToolStrip tool = new ToolStrip();
            addToolbarButton(tool, "reload", reloadHandler);
            addToolbarButton(tool, "back", backHandler);
            addToolbarButton(tool, "forward", forwardHandler);
            addToolbarButton(tool, "text", textHandler);
            addToolbarButton(tool, "html", htmlHandler);

            ToolStrip tool2 = new ToolStrip();
            addr = addToolbarTextBox(tool2, "addr", addrHandler);
            addToolbarButton(tool2, "go", goHandler);

            panel.Controls.Add(tool2);
            panel.Controls.Add(tool);
        }

        public void loadUrl(String url)
        {
            web.Navigate(url);
        }

        public String getHtml()
        {
            return web.DocumentText;
        }

        public String getInnerText()
        {
            List<String> htmls = getText("html");
            return htmls[0];
        }

        public String getInnerHtml()
        {
            List<String> htmls = getHtmlText("html");
            return htmls[0];
        }

        public List<String> getText(String tag) //html, body, img ...
        {
            List<String> htmls = new List<String>();
            HtmlElementCollection elm = web.Document.GetElementsByTagName(tag);
            foreach (HtmlElement html in elm)
            {
                htmls.Add(html.InnerText);
            }
            return htmls;
        }

        public List<String> getHtmlText(String tag)
        {
            List<String> htmls = new List<String>();
            HtmlElementCollection elm = web.Document.GetElementsByTagName(tag);
            foreach (HtmlElement html in elm)
            {
                htmls.Add(html.InnerHtml);
            }
            return htmls;
        }

        private void reloadHandler(object source, EventArgs e)
        {
            web.Refresh();
        }

        private void backHandler(object source, EventArgs e)
        {
            if (web.CanGoBack)
            {
                web.GoBack();
            }
        }

        private void forwardHandler(object source, EventArgs e)
        {
            if (web.CanGoForward)
            {
                web.GoForward();
            }
        }

        private void textHandler(object source, EventArgs e)
        {
            Clipboard.SetText(getInnerText());
        }

        private void htmlHandler(object source, EventArgs e)
        {

            Clipboard.SetText(getInnerHtml());
        }

        private void addrHandler(object source, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                web.Navigate(addr.Text);
            }
        }

        private void goHandler(object source, EventArgs e)
        {
            web.Navigate(addr.Text);
        }
    }
}
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