page_format.dart
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/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
part of pdf;
class PdfPageFormat {
const PdfPageFormat(this.width, this.height,
{double marginTop = 0.0,
double marginBottom = 0.0,
double marginLeft = 0.0,
double marginRight = 0.0,
double marginAll})
: marginTop = marginAll ?? marginTop,
marginBottom = marginAll ?? marginBottom,
marginLeft = marginAll ?? marginLeft,
marginRight = marginAll ?? marginRight;
static const PdfPageFormat a3 =
PdfPageFormat(29.7 * cm, 42 * cm, marginAll: 2.0 * cm);
static const PdfPageFormat a4 =
PdfPageFormat(21.0 * cm, 29.7 * cm, marginAll: 2.0 * cm);
static const PdfPageFormat a5 =
PdfPageFormat(14.8 * cm, 21.0 * cm, marginAll: 2.0 * cm);
static const PdfPageFormat letter =
PdfPageFormat(8.5 * inch, 11.0 * inch, marginAll: inch);
static const PdfPageFormat legal =
PdfPageFormat(8.5 * inch, 14.0 * inch, marginAll: inch);
static const PdfPageFormat standard = a4;
static const double point = 1.0;
static const double inch = 72.0;
static const double cm = inch / 2.54;
static const double mm = inch / 25.4;
final double width;
final double height;
final double marginTop;
final double marginBottom;
final double marginLeft;
final double marginRight;
PdfPageFormat copyWith(
{double width,
double height,
double marginTop,
double marginBottom,
double marginLeft,
double marginRight}) {
return PdfPageFormat(width ?? this.width, height ?? this.height,
marginTop: marginTop ?? this.marginTop,
marginBottom: marginBottom ?? this.marginBottom,
marginLeft: marginLeft ?? this.marginLeft,
marginRight: marginRight ?? this.marginRight);
}
/// Total page dimensions
PdfPoint get dimension => PdfPoint(width, height);
/// Total page width excluding margins
double get availableWidth => width - marginLeft - marginRight;
/// Total page height excluding margins
double get availableHeight => height - marginTop - marginBottom;
/// Total page dimensions excluding margins
PdfPoint get availableDimension => PdfPoint(availableWidth, availableHeight);
PdfPageFormat get landscape =>
width >= height ? this : copyWith(width: height, height: width);
PdfPageFormat get portrait =>
height >= width ? this : copyWith(width: height, height: width);
PdfPageFormat applyMargin(
{double left, double top, double right, double bottom}) =>
copyWith(
marginLeft: math.max(marginLeft, left),
marginTop: math.max(marginTop, top),
marginRight: math.max(marginRight, right),
marginBottom: math.max(marginBottom, bottom),
);
@override
String toString() {
return 'Page ${width}x$height margins:$marginLeft, $marginTop, $marginRight, $marginBottom';
}
}