/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.gfui; import gplx.*;
import java.awt.font.TextAttribute;
import java.text.AttributedString;
public class GfxStringData {
	public String Val() {
		if (ownerElem == null) return val;
		if (ownerElem.TextVal() == null) return "";
		return ownerElem.TextVal();
	}	String val = "";
	public GfuiAlign AlignH() {return alignH;} GfuiAlign alignH;
	public GfxStringData AlignH_(GfuiAlign val) {
		alignH = val;
		if (ownerElem != null) GfoInvkAble_.InvkCmd_val(ownerElem, GxwElem_lang.AlignH_cmd, alignH);	// needed for TextBox, since its Paint is not overriden
		TextRect_setNull();
		return this;
	}
	public GfuiAlign AlignV() {return alignV;} public GfxStringData AlignV_(GfuiAlign val) {alignV = val; return this;} GfuiAlign alignV = GfuiAlign_.Mid;
	public ColorAdp Color() {return brush.Color();}
		public SolidBrushAdp UnderBrush() {return brush;} SolidBrushAdp brush;
	public AttributedString MnemonicString() {return mnemonicString;} AttributedString mnemonicString;
	String drawn = "";
	public void MnemonicString_sync() {
		int pos = GfuiWinKeyCmdMgr.ExtractPosFromText(this.Val()); if (pos == String_.Find_none) return;
		drawn = String_.MidByLen(this.Val(), 0, pos) + String_.Mid(this.Val(), pos + 1);	// rebuild string without &
		mnemonicString = new AttributedString(drawn);
		mnemonicString.addAttribute(TextAttribute.FONT, font.UnderFont());
		mnemonicString.addAttribute(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON, pos, pos + 1);
	}
	
		public GfxStringData Color_(ColorAdp val) {
		brush = SolidBrushAdp_.new_(val);
		if (ownerElem != null) ownerElem.Core().ForeColor_set(val);
		TextRect_setNull();
		return this;
	}
	public FontAdp Font() {return font;} FontAdp font;
	public GfxStringData Font_(FontAdp val) {
		font = val;
		if (!Env_.Mode_testing() && ownerElem != null) ownerElem.Core().TextFont_set(font);
		TextRect_setNull();
				MnemonicString_sync();
				return this;
	}
	public RectAdpF TextRect() {return textRect;} public void TextRect_set(RectAdpF val) {textRect = val;} public void TextRect_setNull() {textRect = RectAdpF.Null;} RectAdpF textRect = RectAdpF.Null;
	public RectAdpF TextRect_setX(int x) {
		textRect = RectAdpF.new_(x, textRect.Y(), textRect.Width(), textRect.Height());
		return textRect;
	}
	@gplx.Internal protected SizeAdp OwnerSize() {return ownerSize;}
	public void OwnerSize_sync(SizeAdp val) {
		ownerSize = val; TextRect_setNull();
		ownerElem.Core().Invalidate();	// NOTE: force redraw; this may be redundant in WINFORMS but needed in SWING especially when windowOpened causes resize; SWING seems to execute windowOpened -> resize -> paint -> componentResized
	} SizeAdp ownerSize = SizeAdp_.new_(20, 20); 
	@gplx.Internal protected GxwElem UnderElem() {return owner.UnderElem();}
	public void DrawData(GfxAdp gfx) {
		if (textRect.Eq(RectAdpF.Null)) {textRect = TextRect_calc(gfx);}
		gfx.DrawStringXtn(this.Val(), font, brush, textRect.X(), textRect.Y(), textRect.Width(), textRect.Height(), this);
	}
	@gplx.Internal protected void Text_set(String v) {
		if (this.Val() == v) return;
		if (ownerElem != null) {
			ownerElem.TextVal_set(v);
			if (owner.CustomDraw()) ownerElem.Core().Invalidate();
		}
		else
			this.val = v;
		TextRect_setNull();
				MnemonicString_sync();
			}
	public RectAdpF TextRect_calc(GfxAdp gfx) {
				
		float[] sizeAry = gfx.MeasureStringXtn(drawn == "" ? this.Val() : drawn, font, this);
		float width = sizeAry[0], height = sizeAry[1], descent = sizeAry[2];
//		if (String_.Eq("opal.gfds 0.0.1", this.Val())) {
//			Tfds.Write(this.Val(), alignH.Val(), (int)width, ownerSize.Width());
//		}
		float x = GfuiAlign_.CalcInsideOfAxis(alignH.Val(), (int)width, ownerSize.Width());
		float y = 0; int alignVVal = alignV.Val(); float ownerHeight = ownerSize.Height();
		if 		(alignVVal == GfuiAlign_.Null.Val())	y = Int_.MinValue;
		else if (alignVVal == GfuiAlign_.Lo.Val())		y = height - descent;
		else if (alignVVal == GfuiAlign_.Mid.Val())		y = (ownerHeight - (ownerHeight - height) / 2);// - descent; // COMMENT: subtracting descent is theoretically correct, but practically results in text shifted up
		else if (alignVVal == GfuiAlign_.Hi.Val())		y = ownerHeight - descent;
		if (width > ownerElem.Core().Width()) width = ownerElem.Core().Width();	// clip to elem size or else text overflows; EX: tab buttons
				if (x < 0) x = 0; if (y < 0) y = 0;	// occurs when text is larger than elem; do not allow negative values			
		return RectAdpF.new_(x, y, width, height);
	}	GfuiElemBase owner; GxwElem ownerElem;
	public static GfxStringData new_(GfuiElemBase owner, GxwElem ownerElem) {
		GfxStringData rv = new GfxStringData();
		rv.brush = SolidBrushAdp_.Black;
		rv.alignH = GfuiAlign_.Left;
		rv.owner = owner;
		rv.ownerElem = ownerElem;
		// WORKAROUND:.NET: setting font on textBox causes odd selection behavior for MediaTimeBox
				rv.Font_(FontAdp.new_("Arial", 8, FontStyleAdp_.Plain));	// needed for TextBox, since its Paint is not overriden, and .Font property must be set
				return rv;
	}	GfxStringData() {}
	public static final GfxStringData Null = null;
}
