org.eclipse.osbp.xtext.chart.ui/src/org/eclipse/osbp/xtext/chart/ui/contentassist/ChartDSLProposalProvider.xtend

/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  All rights reserved. This program and the accompanying materials           
 *  are made available under the terms of the Eclipse Public License 2.0        
 *  which accompanies this distribution, and is available at                  
 *  https://www.eclipse.org/legal/epl-2.0/                                 
 *                                 
 *  SPDX-License-Identifier: EPL-2.0                                 
 *                                                                            
 *  Contributors:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 * 
 *  This copyright notice shows up in the generated Java code
 *
 */
 
package org.eclipse.osbp.xtext.chart.ui.contentassist

import com.google.inject.Inject
import org.eclipse.emf.ecore.EObject
import org.eclipse.jface.viewers.StyledString
import org.eclipse.osbp.xtext.basic.ui.contentassist.BasicDSLProposalProviderHelper
import org.eclipse.osbp.xtext.chart.ChartAxis
import org.eclipse.osbp.xtext.chart.RenderTypeEnum
import org.eclipse.osbp.xtext.chart.ui.ChartDSLDocumentationTranslator
import org.eclipse.swt.widgets.ColorDialog
import org.eclipse.xtext.Assignment
import org.eclipse.xtext.Keyword
import org.eclipse.xtext.RuleCall
import org.eclipse.xtext.common.ui.contentassist.TerminalsProposalProvider
import org.eclipse.xtext.ui.editor.contentassist.ConfigurableCompletionProposal
import org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext
import org.eclipse.xtext.ui.editor.contentassist.ICompletionProposalAcceptor
import org.eclipse.xtext.ui.editor.contentassist.ReplacementTextApplier

class MyReplacementTextApplier extends ReplacementTextApplier {
	var ContentAssistContext context

	def setContext(ContentAssistContext context) {
		this.context = context
	}

	// this will inject a color picker when selecting the color picker proposal	
	override getActualReplacementString(ConfigurableCompletionProposal proposal) {
		var display = context.getViewer().getTextWidget().getDisplay();
		var colorDialog = new ColorDialog(display.getActiveShell());
		var newColor = colorDialog.open();
		return "\"".concat(newColor.red.toString).concat(",").concat(newColor.green.toString).concat(",").concat(
			newColor.blue.toString).concat("\"");
	}
}

class ChartDSLProposalProvider extends AbstractChartDSLProposalProvider {
	@Inject TerminalsProposalProvider provider
	@Inject BasicDSLProposalProviderHelper providerHelper

	override protected StyledString getKeywordDisplayString(Keyword keyword) {
		return BasicDSLProposalProviderHelper.getKeywordDisplayString(keyword,
			ChartDSLDocumentationTranslator.instance())
	}

	/**
	 * This override will enable 1 length non letter characters as keyword.
	 */
	override protected boolean isKeywordWorthyToPropose(Keyword keyword) {
		return true
	}

	override public void completeChartSegmentColor_Rgb(EObject model, Assignment assignment,
		ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		colorPickerProposal(model, assignment, context, acceptor)
	}

	def colorPickerProposal(EObject model, Assignment assignment, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		var pickColor = createCompletionProposal("Pick color...", context) as ConfigurableCompletionProposal
		if (pickColor != null) {
			var applier = new MyReplacementTextApplier()
			applier.setContext(context)
			pickColor.setTextApplier = applier
		}
		acceptor.accept(pickColor)

		// predefined colors
		acceptor.accept(createCompletionProposal("\"230,128,64\" /* orange */", "orange", null, context));
		acceptor.accept(createCompletionProposal("\"255,182,182\" /* light red */", "light red", null, context));
		acceptor.accept(createCompletionProposal("\"255,0,0\" /* red */", "red", null, context));
		acceptor.accept(createCompletionProposal("\"204,102,102\" /* dark red */", "dark red", null, context));
		acceptor.accept(createCompletionProposal("\"255,255,128\" /*light yellow */", "light yellow", null, context));
		acceptor.accept(createCompletionProposal("\"255,255,0\" /* yellow */", "yellow", null, context));
		acceptor.accept(createCompletionProposal("\"128,128,0\" /* dark yellow */", "dark yellow", null, context));
		acceptor.accept(createCompletionProposal("\"102,204,102\" /* light green */", "light green", null, context));
		acceptor.accept(createCompletionProposal("\"0,255,0\" /* green */", "green", null, context));
		acceptor.accept(createCompletionProposal("\"147,183,95\" /* dark green */", "dark green", null, context));
		acceptor.accept(createCompletionProposal("\"0,0,0\" /* black */", "black", null, context));
		acceptor.accept(createCompletionProposal("\"255,255,255\" /* white */", "white", null, context));
	}

	override protected isValidProposal(String proposal, String prefix, ContentAssistContext context) {
		var result = super.isValidProposal(proposal, prefix, context)
		if (context.getCurrentModel() instanceof ChartAxis) {

			// do only allow shortlabels on a category axis
			// ACTUALLY NOT USED! It´s use has to be reviewed! 
			//			if ((context.getCurrentModel() as ChartAxis).renderType != RenderTypeEnum.CATEGORY) {
			//				return false
			//			}
			return true
		}
		return result
	}

	override public void complete_QualifiedName(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		providerHelper.complete_PackageName(model, ruleCall, context, acceptor, this)
	}

	override public void completeChartAxis_Angle(EObject model, Assignment assignment, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		var ruleCall = (assignment.getTerminal() as RuleCall)
		var feature = providerHelper.getAssignedFeature(ruleCall);
		providerHelper.createIntProposal(context, acceptor, ruleCall, feature, 0, "value between -360 and 360", this)
	}

	override public void completeChartBubble_MultiplierValue(EObject model, Assignment assignment,
		ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		providerHelper.createNumberProposal(context, acceptor, (assignment.terminal as RuleCall), this)
	}

	override public void completeChartNumberInterval_NumberIntervalValue(EObject model, Assignment assignment,
		ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		provider.complete_INT(model, (assignment.terminal as RuleCall), context, acceptor)
	}

	// ------------------------ delegates to TerminalsProposalProvider -----------------
	override public void complete_INT(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		provider.complete_INT(model, ruleCall, context, acceptor)
	}

	override public void complete_ID(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		provider.complete_ID(model, ruleCall, context, acceptor)
	}

	override public void complete_TRANSLATABLESTRING(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		provider.complete_STRING(model, ruleCall, context, acceptor)
	}

	override public void complete_TRANSLATABLEID(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		provider.complete_ID(model, ruleCall, context, acceptor)
	}

	override public void completeChartGauge_LabelValue(EObject model, Assignment assignment,
		ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		provider.complete_STRING(model, (assignment.getTerminal() as RuleCall), context, acceptor)
	}

}