actioneditor.java

一个用java语言编写的网络爬虫程序

            
        ScriptInterpreter interp = Context.getScriptInterpreter ();

        script = new TextArea (4,40);
        if (interp != null) {
            add (ActionFeatureChoice.SCRIPT_ACTION, 
                 panel = Constrain.makeConstrainedPanel (1, 2));
            Constrain.add (panel, new Label (interp.getLanguage() + " Function (crawler, page)"), 
                           Constrain.labelLike (0, 0));
            Constrain.add (panel, script, Constrain.areaLike (0, 1));
        }
        else {
            add (ActionFeatureChoice.SCRIPT_ACTION, 
                 panel = Constrain.makeConstrainedPanel (1, 1));
            Constrain.add (panel, new Label ("No scripting language is available."),
                           Constrain.labelLike (0, 0));
        }
    }
    
    public boolean handleEvent (Event event) {
        if (event.id == Event.ACTION_EVENT) {
            if (event.target == browseMirrorDirectory)
                browse ("Save Pages in Directory", mirrorDirectory);
            else if (event.target == browseConcatFilename)
                browse ("Save Concatenation As", concatFilename);
            else if (event.target == browseExtractFilename)
                browse ("Save Extracts As", extractFilename);
            else if (event.target == optionsButton)
                new ConcatOptions(this).show ();
            else
                return super.handleEvent (event);
        }
        else
            return super.handleEvent (event);
            
        return true;
    }
        
    
    void browse (String title, TextField target) {
        String fn = PopupDialog.askFilename (this, title, target.getText(), false);
        if (fn != null)
            target.setText (fn);
    }
                       
    public void setColor (String color) {
        this.color.select (color);
    }

    public String getColor () {
        return color.getSelectedItem ();
    }

    public void setScale (String scale) {
        try {
            double d = Double.valueOf (scale).doubleValue();
            // FIX: allow user to enter any scale factor ?
            if (d < 1)
                this.scale.select ("small");
            else if (d > 1)
                this.scale.select ("large");
            else
                this.scale.select ("normal");
        } catch (NumberFormatException e) {
            this.scale.select ("normal");                
        }
    }

    public String getScale () {
        switch (scale.getSelectedIndex()) {
            case 0: return "0.5";
            case 2: return "2.0";
            default: return "1.0";
        }
    }

    public void setIcon (String icon) {
        //this.icon.select (color);
    }

    public String getIcon () {
        return null;
        //return icon.getSelectedItem ();
    }

    
    public void setMirrorDirectory (String directory) {
        mirrorDirectory.setText (directory != null ? directory : TEMPORARY_DIR);
    }

    public String getMirrorDirectory () {
        String f = mirrorDirectory.getText ();
        return f.equals (TEMPORARY_DIR) ? null : f;
    }

    public void setMirrorUseBrowser (boolean use) {
        mirrorUseBrowser.setState (use);
    }

    public boolean getMirrorUseBrowser () {
        return mirrorUseBrowser.getState ();
    }

    public void setConcatFilename (String filename) {
        concatFilename.setText (filename != null ? filename : TEMPORARY_FILE);
    }

    public String getConcatFilename () {
        String f = concatFilename.getText ();
        return f.equals (TEMPORARY_FILE) ? null : f;
    }

    public void setConcatUseBrowser (boolean use) {
        concatUseBrowser.setState (use);
    }

    public boolean getConcatUseBrowser () {
        return concatUseBrowser.getState ();
    }

    public void setExtractFilename (String filename) {
        extractFilename.setText (filename != null ? filename : TEMPORARY_FILE);
    }

    public String getExtractFilename () {
        String f = extractFilename.getText ();
        return f.equals (TEMPORARY_FILE) ? null : f;
    }

    public void setExtractUseBrowser (boolean use) {
        extractUseBrowser.setState (use);
    }

    public boolean getExtractUseBrowser () {
        return extractUseBrowser.getState ();
    }

    public void setExtractPattern (String pattern) {
        extractPattern.setText (pattern);
    }

    public String getExtractPattern () {
        return extractPattern.getText ();
    }
    
    public void setTextOnly (boolean f) {
        extractMedium.select (f ? "text" : "HTML");
    }
    
    public boolean getTextOnly () {
        return extractMedium.getSelectedItem().equals ("text");
    }

    public void setScript (String script) {
        this.script.setText (script);
    }

    public String getScript () {
        return script.getText ();
    }
}

class ConcatOptions extends PopupDialog {
    ActionFeatureArgs e;

    TextArea prolog, header, footer, divider, epilog;
    
    Button applyButton;
    Button okButton;
    Button cancelButton;

    public ConcatOptions (ActionFeatureArgs e) {
        super (getFrame (e), "Concatenate Options", true);
        this.e = e;

        setLayout (new GridBagLayout ());

        Constrain.add (this, new Label ("Prolog:"),
                       Constrain.labelLike (0, 0));
        Constrain.add (this, prolog = new TextArea (e.prolog, 3, 40),
                       Constrain.areaLike (1, 0));

        Constrain.add (this, new Label ("Page Header:"),
                       Constrain.labelLike (0, 1));
        Constrain.add (this, header = new TextArea (e.header, 3, 40),
                       Constrain.areaLike (1, 1));

        Constrain.add (this, new Label ("Page Footer:"),
                       Constrain.labelLike (0, 2));
        Constrain.add (this, footer = new TextArea (e.footer, 3, 40),
                       Constrain.areaLike (1, 2));

        Constrain.add (this, new Label ("Page Divider:"),
                       Constrain.labelLike (0, 3));
        Constrain.add (this, divider = new TextArea (e.divider, 3, 40),
                       Constrain.areaLike (1, 3));

        Constrain.add (this, new Label ("Epilog:"),
                       Constrain.labelLike (0, 4));
        Constrain.add (this, epilog = new TextArea (e.epilog, 3, 40),
                       Constrain.areaLike (1, 4));

        Panel panel;    
        Constrain.add (this, panel = new Panel(), 
                       Constrain.centered (Constrain.labelLike (0, 5, 2)));
        panel.add (applyButton = new Button ("Apply"));
        panel.add (okButton = new Button ("OK"));
        panel.add (cancelButton = new Button ("Cancel"));

        pack ();
    }

    void writeBack () {
        e.prolog = prolog.getText();
        e.header = header.getText();
        e.footer = footer.getText();
        e.divider = divider.getText();
        e.epilog = epilog.getText();
    }
    
    
    public boolean handleEvent (Event event) {
        if (event.id == Event.ACTION_EVENT) {
            if (event.target == applyButton)
                writeBack ();
            else if (event.target == okButton) {
                writeBack ();
                close ();
            }
            else if (event.target == cancelButton)
                close ();
            else
                return super.handleEvent (event);
        }
        else
            return super.handleEvent (event);

        return true;
    }
}