<?php
//=======================================================================
// File:        JPGRAPH_TEXT.INC.PHP
// Description: Class to handle text as object in the graph.
//              The low level text layout engine is handled by the GD class
// Created:     2001-01-08 (Refactored to separate file 2008-08-01)
// Ver:         $Id: jpgraph_text.inc.php 1844 2009-09-26 17:05:31Z ljp $
//
// Copyright (c) Asial Corporation. All rights reserved.
//========================================================================


//===================================================
// CLASS Text
// Description: Arbitrary text object that can be added to the graph
//===================================================
class Text
{
    public $t;
    public $x=0;
    public $y=0;
    public $halign="left";
    public $valign="top";
    public $color=array(0,0,0);
    public $hide=false;
    public $dir=0;
    public $iScalePosY=null;
    public $iScalePosX=null;
    public $iWordwrap=0;
    public $font_family=FF_DEFAULT;
    public $font_style=FS_NORMAL; // old. FF_FONT1
    protected $boxed=false; // Should the text be boxed
    protected $paragraph_align="left";
    protected $icornerradius=0;
    protected $ishadowwidth=3;
    protected $fcolor='white';
    protected $bcolor='black';
    protected $shadow=false;
    protected $iCSIMarea='';
    protected $iCSIMalt='';
    protected $iCSIMtarget='';
    protected $iCSIMWinTarget='';
    private $iBoxType = 1; // Which variant of filled box around text we want

    // for __get, __set
    private $_margin;
    private $_font_size=8; // old. 12

    //---------------
    // CONSTRUCTOR

    // Create new text at absolute pixel coordinates
    public function __construct($aTxt="", $aXAbsPos=0, $aYAbsPos=0)
    {
        if (! is_string($aTxt)) {
            JpGraphError::RaiseL(25050);//('First argument to Text::Text() must be s atring.');
        }
        $this->t = $aTxt;
        $this->x = round($aXAbsPos);
        $this->y = round($aYAbsPos);
        $this->margin = 0;
    }
    //---------------
    // PUBLIC METHODS
    // Set the string in the text object
    public function Set($aTxt)
    {
        $this->t = $aTxt;
    }

    // Alias for Pos()
    public function SetPos($aXAbsPos=0, $aYAbsPos=0, $aHAlign="left", $aVAlign="top")
    {
        //$this->Pos($aXAbsPos,$aYAbsPos,$aHAlign,$aVAlign);
        $this->x = $aXAbsPos;
        $this->y = $aYAbsPos;
        $this->halign = $aHAlign;
        $this->valign = $aVAlign;
    }

    public function SetScalePos($aX, $aY)
    {
        $this->iScalePosX = $aX;
        $this->iScalePosY = $aY;
    }

    // Specify alignment for the text
    public function Align($aHAlign, $aVAlign="top", $aParagraphAlign="")
    {
        $this->halign = $aHAlign;
        $this->valign = $aVAlign;
        if ($aParagraphAlign != "") {
            $this->paragraph_align = $aParagraphAlign;
        }
    }

    // Alias
    public function SetAlign($aHAlign, $aVAlign="top", $aParagraphAlign="")
    {
        $this->Align($aHAlign, $aVAlign, $aParagraphAlign);
    }

    // Specifies the alignment for a multi line text
    public function ParagraphAlign($aAlign)
    {
        $this->paragraph_align = $aAlign;
    }

    // Specifies the alignment for a multi line text
    public function SetParagraphAlign($aAlign)
    {
        $this->paragraph_align = $aAlign;
    }

    public function SetShadow($aShadowColor='gray', $aShadowWidth=3)
    {
        $this->ishadowwidth=$aShadowWidth;
        $this->shadow=$aShadowColor;
        $this->boxed=true;
    }

    public function SetWordWrap($aCol)
    {
        $this->iWordwrap = $aCol ;
    }

    // Specify that the text should be boxed. fcolor=frame color, bcolor=border color,
    // $shadow=drop shadow should be added around the text.
    public function SetBox($aFrameColor=array(255,255,255), $aBorderColor=array(0,0,0), $aShadowColor=false, $aCornerRadius=4, $aShadowWidth=3)
    {
        if ($aFrameColor === false) {
            $this->boxed=false;
        } else {
            $this->boxed=true;
        }
        $this->fcolor=$aFrameColor;
        $this->bcolor=$aBorderColor;
        // For backwards compatibility when shadow was just true or false
        if ($aShadowColor === true) {
            $aShadowColor = 'gray';
        }
        $this->shadow=$aShadowColor;
        $this->icornerradius=$aCornerRadius;
        $this->ishadowwidth=$aShadowWidth;
    }

    public function SetBox2($aFrameColor=array(255,255,255), $aBorderColor=array(0,0,0), $aShadowColor=false, $aCornerRadius=4, $aShadowWidth=3)
    {
        $this->iBoxType=2;
        $this->SetBox($aFrameColor, $aBorderColor, $aShadowColor, $aCornerRadius, $aShadowWidth);
    }

    // Hide the text
    public function Hide($aHide=true)
    {
        $this->hide=$aHide;
    }

    // This looks ugly since it's not a very orthogonal design
    // but I added this "inverse" of Hide() to harmonize
    // with some classes which I designed more recently (especially)
    // jpgraph_gantt
    public function Show($aShow=true)
    {
        $this->hide=!$aShow;
    }

    // Specify font
    public function SetFont($aFamily, $aStyle=FS_NORMAL, $aSize=10)
    {
        $this->font_family=$aFamily;
        $this->font_style=$aStyle;
        $this->font_size=$aSize;
    }

    // Center the text between $left and $right coordinates
    public function Center($aLeft, $aRight, $aYAbsPos=false)
    {
        $this->x = $aLeft + ($aRight-$aLeft)/2;
        $this->halign = "center";
        if (is_numeric($aYAbsPos)) {
            $this->y = $aYAbsPos;
        }
    }

    // Set text color
    public function SetColor($aColor)
    {
        $this->color = $aColor;
    }

    public function SetAngle($aAngle)
    {
        $this->SetOrientation($aAngle);
    }

    // Orientation of text. Note only TTF fonts can have an arbitrary angle
    public function SetOrientation($aDirection=0)
    {
        if (is_numeric($aDirection)) {
            $this->dir=$aDirection;
        } elseif ($aDirection=="h") {
            $this->dir = 0;
        } elseif ($aDirection=="v") {
            $this->dir = 90;
        } else {
            JpGraphError::RaiseL(25051);
        }//(" Invalid direction specified for text.");
    }

    // Total width of text
    public function GetWidth($aImg)
    {
        $aImg->SetFont($this->font_family, $this->font_style, $this->raw_font_size);
        $w = $aImg->GetTextWidth($this->t, $this->dir);
        return $w;
    }

    // Hight of font
    public function GetFontHeight($aImg)
    {
        $aImg->SetFont($this->font_family, $this->font_style, $this->raw_font_size);
        $h = $aImg->GetFontHeight();
        return $h;
    }

    public function GetTextHeight($aImg)
    {
        $aImg->SetFont($this->font_family, $this->font_style, $this->raw_font_size);
        $h = $aImg->GetTextHeight($this->t, $this->dir);
        return $h;
    }

    public function GetHeight($aImg)
    {
        // Synonym for GetTextHeight()
        $aImg->SetFont($this->font_family, $this->font_style, $this->raw_font_size);
        $h = $aImg->GetTextHeight($this->t, $this->dir);
        return $h;
    }

    // Set the margin which will be interpretated differently depending
    // on the context.
    public function SetMargin($aMarg)
    {
        $this->margin = $aMarg;
    }

    public function StrokeWithScale($aImg, $axscale, $ayscale)
    {
        if ($this->iScalePosX === null || $this->iScalePosY === null) {
            $this->Stroke($aImg);
        } else {
            $this->Stroke(
                $aImg,
                round($axscale->Translate($this->iScalePosX)),
                round($ayscale->Translate($this->iScalePosY))
            );
        }
    }

    public function SetCSIMTarget($aURITarget, $aAlt='', $aWinTarget='')
    {
        $this->iCSIMtarget = $aURITarget;
        $this->iCSIMalt = $aAlt;
        $this->iCSIMWinTarget = $aWinTarget;
    }

    public function GetCSIMareas()
    {
        if ($this->iCSIMtarget !== '') {
            return $this->iCSIMarea;
        } else {
            return '';
        }
    }

    // Display text in image
    public function Stroke($aImg, $x=null, $y=null)
    {
        if ($x !== null) {
            $this->x = round($x);
        }
        if ($y !== null) {
            $this->y = round($y);
        }

        // Insert newlines
        if ($this->iWordwrap > 0) {
            $this->t = wordwrap($this->t, $this->iWordwrap, "\n");
        }

        // If position been given as a fraction of the image size
        // calculate the absolute position
        if ($this->x < 1 && $this->x > 0) {
            $this->x *= $aImg->width;
        }
        if ($this->y < 1 && $this->y > 0) {
            $this->y *= $aImg->height;
        }

        $aImg->PushColor($this->color);
        $aImg->SetFont($this->font_family, $this->font_style, $this->raw_font_size);
        $aImg->SetTextAlign($this->halign, $this->valign);

        if ($this->boxed) {
            if ($this->fcolor=="nofill") {
                $this->fcolor=false;
            }

            $oldweight=$aImg->SetLineWeight(1);

            if ($this->iBoxType == 2 && $this->font_family > FF_FONT2+2) {
                $bbox = $aImg->StrokeBoxedText2(
                    $this->x,
                    $this->y,
                    $this->t,
                    $this->dir,
                    $this->fcolor,
                    $this->bcolor,
                    $this->shadow,
                    $this->paragraph_align,
                    2,
                    4,
                    $this->icornerradius,
                    $this->ishadowwidth
                );
            } else {
                $bbox = $aImg->StrokeBoxedText(
                    $this->x,
                    $this->y,
                    $this->t,
                    $this->dir,
                    $this->fcolor,
                    $this->bcolor,
                    $this->shadow,
                    $this->paragraph_align,
                    3,
                    3,
                    $this->icornerradius,
                    $this->ishadowwidth
                );
            }

            $aImg->SetLineWeight($oldweight);
        } else {
            $debug=false;
            $bbox = $aImg->StrokeText($this->x, $this->y, $this->t, $this->dir, $this->paragraph_align, $debug);
        }

        // Create CSIM targets
        $coords = $bbox[0].','.$bbox[1].','.$bbox[2].','.$bbox[3].','.$bbox[4].','.$bbox[5].','.$bbox[6].','.$bbox[7];
        $this->iCSIMarea = "<area shape=\"poly\" coords=\"$coords\" href=\"".htmlentities($this->iCSIMtarget)."\" ";
        if (trim($this->iCSIMalt) != '') {
            $this->iCSIMarea .= " alt=\"".$this->iCSIMalt."\" ";
            $this->iCSIMarea .= " title=\"".$this->iCSIMalt."\" ";
        }
        if (trim($this->iCSIMWinTarget) != '') {
            $this->iCSIMarea .= " target=\"".$this->iCSIMWinTarget."\" ";
        }
        $this->iCSIMarea .= " />\n";

        $aImg->PopColor($this->color);
    }

    public function __get($name)
    {
        if (strpos($name, 'raw_') !== false) {
            // if $name == 'raw_left_margin' , return $this->_left_margin;
            $variable_name = '_' . str_replace('raw_', '', $name);
            return $this->$variable_name;
        }

        $variable_name = '_' . $name;

        if (isset($this->$variable_name)) {
            return $this->$variable_name * SUPERSAMPLING_SCALE;
        } else {
            JpGraphError::RaiseL('25132', $name);
        }
    }

    public function __set($name, $value)
    {
        $this->{'_'.$name} = $value;
    }
} // Class