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Removing the rotatePoint, width, height from the API
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parent
737ed84174
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5 changed files with 160 additions and 149 deletions
88
src/util.js
88
src/util.js
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@ -97,6 +97,19 @@ var Util = (function UtilClosure() {
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return [xt, yt];
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};
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Util.applyInverseTransform = function Util_applyTransform(p, m) {
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var d = m[0] * m[3] - m[1] * m[2];
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var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
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var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
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return [xt, yt];
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};
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Util.inverseTransform = function Util_inverseTransform(m) {
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var d = m[0] * m[3] - m[1] * m[2];
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return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
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(m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
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};
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// Apply a generic 3d matrix M on a 3-vector v:
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// | a b c | | X |
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// | d e f | x | Y |
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@ -165,7 +178,7 @@ var Util = (function UtilClosure() {
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}
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return result;
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}
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};
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Util.sign = function Util_sign(num) {
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return num < 0 ? -1 : 1;
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@ -174,6 +187,79 @@ var Util = (function UtilClosure() {
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return Util;
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})();
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var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
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function PageViewport(viewBox, scale, rotate, offsetX, offsetY) {
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// creating transform to convert pdf coordinate system to the normal
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// canvas like coordinates taking in account scale and rotation
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var centerX = (viewBox[2] + viewBox[0]) / 2;
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var centerY = (viewBox[3] + viewBox[1]) / 2;
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var rotateA, rotateB, rotateC, rotateD;
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switch (rotate) {
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case -180:
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case 180:
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rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
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break;
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case -270:
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case 90:
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rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
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break;
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case -90:
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case 270:
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rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
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break;
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case 360:
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case 0:
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default:
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rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
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break;
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}
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var offsetCanvasX, offsetCanvasY;
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var width, height;
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if (rotateA == 0) {
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offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
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offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
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width = Math.abs(viewBox[3] - viewBox[1]) * scale;
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height = Math.abs(viewBox[2] - viewBox[0]) * scale;
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} else {
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offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
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offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
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width = Math.abs(viewBox[2] - viewBox[0]) * scale;
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height = Math.abs(viewBox[3] - viewBox[1]) * scale;
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}
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// creating transform for the following operations:
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// translate(-centerX, -centerY), rotate and flip vertically,
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// scale, and translate(offsetCanvasX, offsetCanvasY)
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this.transform = [
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rotateA * scale,
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rotateB * scale,
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rotateC * scale,
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rotateD * scale,
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offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
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offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
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];
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this.offsetX = offsetX;
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this.offsetY = offsetY;
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this.width = width;
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this.height = height;
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}
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PageViewport.prototype = {
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convertPointToViewport: function PageViewport_convertPointToViewport(x, y) {
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return Util.applyTransform([x, y], this.transform);
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},
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convertRectangleToViewport:
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function PageViewport_convertRectangeToViewport(rect) {
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var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
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var br = Util.applyTransform([rect[2], rect[3]], this.transform);
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return [tl[0], tl[1], br[0], br[1]];
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},
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convertViewportToPoint: function PageViewport_convertViewportToPoint(x, y) {
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return Util.applyInverseTransform([x, y], this.transform);
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}
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};
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return PageViewport;
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})();
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var PDFStringTranslateTable = [
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
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