com.itextpdf.kernel.pdf.canvas.wmf.MetaState Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
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 savedStates;
/**
* List of MetaObjects.
*/
public List MetaObjects;
/**
* Current Point.
*/
public Point currentPoint;
/**
* Current Pen.
*/
public MetaPen currentPen;
/**
* Current Brush.
*/
public MetaBrush currentBrush;
/**
* Current Font.
*/
public MetaFont currentFont;
/**
* The current background color. Default value is DeviceRgb#WHITE.
*/
public Color currentBackgroundColor = ColorConstants.WHITE;
/**
* Current text color. Default value is DeviceRgb#BLACK.
*/
public Color currentTextColor = ColorConstants.BLACK;
/**
* The current background mode. Default value is OPAQUE.
*/
public int backgroundMode = OPAQUE;
/**
* Current polygon fill mode. Default value is ALTERNATE.
*/
public int polyFillMode = ALTERNATE;
/**
* Curent line join. Default value is 1.
*/
public int lineJoin = 1;
/**
* Current text alignment.
*/
public int textAlign;
/**
* Current offset for Wx.
*/
public int offsetWx;
/**
* Current offset for Wy.
*/
public int offsetWy;
/**
* Current extent for Wx.
*/
public int extentWx;
/**
* Current extent for Wy.
*/
public int extentWy;
/**
* Current x value for scaling.
*/
public float scalingX;
/**
* Current y value for scaling.
*/
public float scalingY;
/**
* Creates new MetaState
*/
public MetaState() {
savedStates = new Stack<>();
MetaObjects = new ArrayList<>();
currentPoint = new Point(0, 0);
currentPen = new MetaPen();
currentBrush = new MetaBrush();
currentFont = new MetaFont();
}
/**
* Clones a new MetaState from the specified MetaState.
*
* @param state the state to clone
*/
public MetaState(MetaState state) {
setMetaState(state);
}
/**
* Sets every field of this MetaState to the values of the fields of the specified MetaState.
*
* @param state state to copy
*/
public void setMetaState(MetaState state) {
savedStates = state.savedStates;
MetaObjects = state.MetaObjects;
currentPoint = state.currentPoint;
currentPen = state.currentPen;
currentBrush = state.currentBrush;
currentFont = state.currentFont;
currentBackgroundColor = state.currentBackgroundColor;
currentTextColor = state.currentTextColor;
backgroundMode = state.backgroundMode;
polyFillMode = state.polyFillMode;
textAlign = state.textAlign;
lineJoin = state.lineJoin;
offsetWx = state.offsetWx;
offsetWy = state.offsetWy;
extentWx = state.extentWx;
extentWy = state.extentWy;
scalingX = state.scalingX;
scalingY = state.scalingY;
}
/**
* Add a MetaObject to the State.
*
* @param object MetaObject to be added
*/
public void addMetaObject(MetaObject object) {
for (int k = 0; k < MetaObjects.size(); ++k) {
if (MetaObjects.get(k) == null) {
MetaObjects.set(k, object);
return;
}
}
MetaObjects.add(object);
}
/**
* Select the MetaObject at the specified index and prepare the PdfCanvas.
*
* @param index position of the MetaObject
* @param cb PdfCanvas to prepare
*/
public void selectMetaObject(int index, PdfCanvas cb) {
MetaObject obj = MetaObjects.get(index);
if (obj == null)
return;
int style;
switch (obj.getType()) {
case MetaObject.META_BRUSH:
currentBrush = (MetaBrush)obj;
style = currentBrush.getStyle();
if (style == MetaBrush.BS_SOLID) {
Color color = currentBrush.getColor();
cb.setFillColor(color);
}
else if (style == MetaBrush.BS_HATCHED) {
Color color = currentBackgroundColor;
cb.setFillColor(color);
}
break;
case MetaObject.META_PEN:
{
currentPen = (MetaPen)obj;
style = currentPen.getStyle();
if (style != MetaPen.PS_NULL) {
Color color = currentPen.getColor();
cb.setStrokeColor(color);
cb.setLineWidth(Math.abs(currentPen.getPenWidth() * scalingX / extentWx));
switch (style) {
case MetaPen.PS_DASH:
cb.setLineDash(18, 6, 0);
break;
case MetaPen.PS_DASHDOT:
cb.writeLiteral("[9 6 3 6]0 d\n");
break;
case MetaPen.PS_DASHDOTDOT:
cb.writeLiteral("[9 3 3 3 3 3]0 d\n");
break;
case MetaPen.PS_DOT:
cb.setLineDash(3, 0);
break;
default:
cb.setLineDash(0);
break;
}
}
break;
}
case MetaObject.META_FONT:
{
currentFont = (MetaFont)obj;
break;
}
}
}
/**
* Deletes the MetaObject at the specified index.
*
* @param index index of the MetaObject to delete
*/
public void deleteMetaObject(int index) {
MetaObjects.set(index, null);
}
/**
* Saves the state of this MetaState object.
*
* @param cb PdfCanvas object on which saveState() will be called
*/
public void saveState(PdfCanvas cb) {
cb.saveState();
MetaState state = new MetaState(this);
savedStates.push(state);
}
/**
* Restores the state to the next state on the saved states stack.
*
* @param index index of the state to be restored
* @param cb PdfCanvas object on which restoreState() will be called
*/
public void restoreState(int index, PdfCanvas cb) {
int pops;
if (index < 0)
pops = Math.min(-index, savedStates.size());
else
pops = Math.max(savedStates.size() - index, 0);
if (pops == 0)
return;
MetaState state = null;
while (pops-- != 0) {
cb.restoreState();
state = savedStates.pop();
}
setMetaState(state);
}
/**
* Restres the state of the specified PdfCanvas object for as many times as there are saved states on the stack.
*
* @param cb PdfCanvas object
*/
public void cleanup(PdfCanvas cb) {
int k = savedStates.size();
while (k-- > 0)
cb.restoreState();
}
/**
* Transform the specified value.
*
* @param x the value to transform
* @return the transformed value
*/
public float transformX(int x) {
return ((float)x - offsetWx) * scalingX / extentWx;
}
/**
* Transform the specified value.
*
* @param y the value to transform
* @return transformed value
*/
public float transformY(int y) {
return (1f - ((float)y - offsetWy) / extentWy) * scalingY;
}
/**
* Sets the x value for scaling.
*
* @param scalingX x value for scaling
*/
public void setScalingX(float scalingX) {
this.scalingX = scalingX;
}
/**
* Sets the y value for scaling.
*
* @param scalingY y value for scaling
*/
public void setScalingY(float scalingY) {
this.scalingY = scalingY;
}
/**
* Sets the Wx offset value.
*
* @param offsetWx Wx offset value
*/
public void setOffsetWx(int offsetWx) {
this.offsetWx = offsetWx;
}
/**
* Sets the Wy offset value.
*
* @param offsetWy Wy offset value
*/
public void setOffsetWy(int offsetWy) {
this.offsetWy = offsetWy;
}
/**
* Sets the Wx extent value.
*
* @param extentWx Wx extent value
*/
public void setExtentWx(int extentWx) {
this.extentWx = extentWx;
}
/**
* Sets the Wy extent value.
*
* @param extentWy Wy extent value
*/
public void setExtentWy(int extentWy) {
this.extentWy = extentWy;
}
/**
* Transforms the specified angle. If scalingY is less than 0, the angle is multiplied by -1. If scalingX is less
* than 0, the angle is subtracted from Math.PI.
*
* @param angle the angle to transform
* @return the transformed angle
*/
public float transformAngle(float angle) {
float ta = scalingY < 0 ? -angle : angle;
return (float)(scalingX < 0 ? Math.PI - ta : ta);
}
/**
* Sets the current Point to the specified Point.
*
* @param p Point to set
*/
public void setCurrentPoint(Point p) {
currentPoint = p;
}
/**
* Returns the current Point.
*
* @return current Point
*/
public Point getCurrentPoint() {
return currentPoint;
}
/**
* Returns the current MetaBrush object.
*
* @return current MetaBrush
*/
public MetaBrush getCurrentBrush() {
return currentBrush;
}
/**
* Returns the current MetaPen object.
*
* @return current MetaPen
*/
public MetaPen getCurrentPen() {
return currentPen;
}
/**
* Returns the current MetaFont object.
*
* @return current MetaFont
*/
public MetaFont getCurrentFont() {
return currentFont;
}
/**
* Getter for property currentBackgroundColor.
* @return Value of property currentBackgroundColor.
*/
public Color getCurrentBackgroundColor() {
return currentBackgroundColor;
}
/** Setter for property currentBackgroundColor.
* @param currentBackgroundColor New value of property currentBackgroundColor.
*/
public void setCurrentBackgroundColor(Color currentBackgroundColor) {
this.currentBackgroundColor = currentBackgroundColor;
}
/** Getter for property currentTextColor.
* @return Value of property currentTextColor.
*/
public Color getCurrentTextColor() {
return currentTextColor;
}
/** Setter for property currentTextColor.
* @param currentTextColor New value of property currentTextColor.
*/
public void setCurrentTextColor(Color currentTextColor) {
this.currentTextColor = currentTextColor;
}
/** Getter for property backgroundMode.
* @return Value of property backgroundMode.
*/
public int getBackgroundMode() {
return backgroundMode;
}
/** Setter for property backgroundMode.
* @param backgroundMode New value of property backgroundMode.
*/
public void setBackgroundMode(int backgroundMode) {
this.backgroundMode = backgroundMode;
}
/** Getter for property textAlign.
* @return Value of property textAlign.
*/
public int getTextAlign() {
return textAlign;
}
/** Setter for property textAlign.
* @param textAlign New value of property textAlign.
*/
public void setTextAlign(int textAlign) {
this.textAlign = textAlign;
}
/** Getter for property polyFillMode.
* @return Value of property polyFillMode.
*/
public int getPolyFillMode() {
return polyFillMode;
}
/** Setter for property polyFillMode.
* @param polyFillMode New value of property polyFillMode.
*/
public void setPolyFillMode(int polyFillMode) {
this.polyFillMode = polyFillMode;
}
/**
* Sets the line join style to {@link LineJoinStyle#MITER} if lineJoin isn't 0.
*
* @param cb PdfCanvas to set the line join style
*/
public void setLineJoinRectangle(PdfCanvas cb) {
if (lineJoin != 0) {
lineJoin = 0;
cb.setLineJoinStyle(PdfCanvasConstants.LineJoinStyle.MITER);
}
}
/**
* Sets the line join style to {@link LineJoinStyle#ROUND} if lineJoin is 0.
*
* @param cb PdfCanvas to set the line join style
*/
public void setLineJoinPolygon(PdfCanvas cb) {
if (lineJoin == 0) {
lineJoin = 1;
cb.setLineJoinStyle(PdfCanvasConstants.LineJoinStyle.ROUND);
}
}
/**
* Returns true if lineJoin is 0.
*
* @return true if lineJoin is 0
*/
public boolean getLineNeutral() {
return lineJoin == 0;
}
}