Refactor and fix style of core.js
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1ddb019449
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@ -14,7 +14,7 @@
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* See the License for the specific language governing permissions and
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* limitations under the License.
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*/
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*/
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/* globals assertWellFormed, calculateMD5, Catalog, error, info, isArray,
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/* globals assertWellFormed, calculateMD5, Catalog, Dict, error, info, isArray,
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isArrayBuffer, isName, isStream, isString, LegacyPromise,
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isArrayBuffer, isName, isStream, isString, LegacyPromise,
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Linearization, NullStream, PartialEvaluator, shadow, Stream, Lexer,
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Linearization, NullStream, PartialEvaluator, shadow, Stream, Lexer,
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StreamsSequenceStream, stringToPDFString, stringToBytes, Util, XRef,
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StreamsSequenceStream, stringToPDFString, stringToBytes, Util, XRef,
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@ -25,6 +25,8 @@
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var Page = (function PageClosure() {
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var Page = (function PageClosure() {
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var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792];
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function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) {
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function Page(pdfManager, xref, pageIndex, pageDict, ref, fontCache) {
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this.pdfManager = pdfManager;
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this.pdfManager = pdfManager;
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this.pageIndex = pageIndex;
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this.pageIndex = pageIndex;
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@ -42,20 +44,24 @@ var Page = (function PageClosure() {
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getPageProp: function Page_getPageProp(key) {
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getPageProp: function Page_getPageProp(key) {
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return this.pageDict.get(key);
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return this.pageDict.get(key);
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},
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},
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inheritPageProp: function Page_inheritPageProp(key) {
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getInheritedPageProp: function Page_inheritPageProp(key) {
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var dict = this.pageDict;
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var dict = this.pageDict;
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var obj = dict.get(key);
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var value = dict.get(key);
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while (obj === undefined) {
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while (value === undefined) {
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dict = dict.get('Parent');
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dict = dict.get('Parent');
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if (!dict)
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if (!dict) {
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break;
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break;
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obj = dict.get(key);
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}
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value = dict.get(key);
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}
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}
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return obj;
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return value;
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},
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},
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get content() {
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get content() {
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return this.getPageProp('Contents');
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return this.getPageProp('Contents');
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},
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},
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get resources() {
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get resources() {
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var value = this.getInheritedPageProp('Resources');
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var value = this.getInheritedPageProp('Resources');
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// For robustness: The spec states that a \Resources entry has to be
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// For robustness: The spec states that a \Resources entry has to be
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@ -66,34 +72,41 @@ var Page = (function PageClosure() {
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}
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}
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return shadow(this, 'resources', value);
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return shadow(this, 'resources', value);
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},
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},
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get mediaBox() {
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get mediaBox() {
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var obj = this.inheritPageProp('MediaBox');
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var obj = this.getInheritedPageProp('MediaBox');
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// Reset invalid media box to letter size.
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// Reset invalid media box to letter size.
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if (!isArray(obj) || obj.length !== 4)
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if (!isArray(obj) || obj.length !== 4) {
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obj = [0, 0, 612, 792];
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obj = LETTER_SIZE_MEDIABOX;
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}
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return shadow(this, 'mediaBox', obj);
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return shadow(this, 'mediaBox', obj);
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},
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},
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get view() {
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get view() {
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var mediaBox = this.mediaBox;
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var mediaBox = this.mediaBox;
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var cropBox = this.inheritPageProp('CropBox');
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var cropBox = this.getInheritedPageProp('CropBox');
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if (!isArray(cropBox) || cropBox.length !== 4)
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if (!isArray(cropBox) || cropBox.length !== 4) {
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return shadow(this, 'view', mediaBox);
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return shadow(this, 'view', mediaBox);
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}
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// From the spec, 6th ed., p.963:
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// From the spec, 6th ed., p.963:
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// "The crop, bleed, trim, and art boxes should not ordinarily
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// "The crop, bleed, trim, and art boxes should not ordinarily
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// extend beyond the boundaries of the media box. If they do, they are
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// extend beyond the boundaries of the media box. If they do, they are
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// effectively reduced to their intersection with the media box."
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// effectively reduced to their intersection with the media box."
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cropBox = Util.intersect(cropBox, mediaBox);
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cropBox = Util.intersect(cropBox, mediaBox);
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if (!cropBox)
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if (!cropBox) {
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return shadow(this, 'view', mediaBox);
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return shadow(this, 'view', mediaBox);
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}
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return shadow(this, 'view', cropBox);
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return shadow(this, 'view', cropBox);
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},
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},
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get annotationRefs() {
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get annotationRefs() {
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return shadow(this, 'annotationRefs', this.inheritPageProp('Annots'));
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return shadow(this, 'annotationRefs',
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this.getInheritedPageProp('Annots'));
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},
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},
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get rotate() {
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get rotate() {
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var rotate = this.inheritPageProp('Rotate') || 0;
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var rotate = this.getInheritedPageProp('Rotate') || 0;
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// Normalize rotation so it's a multiple of 90 and between 0 and 270
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// Normalize rotation so it's a multiple of 90 and between 0 and 270
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if (rotate % 90 !== 0) {
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if (rotate % 90 !== 0) {
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rotate = 0;
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rotate = 0;
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@ -106,6 +119,7 @@ var Page = (function PageClosure() {
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}
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}
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return shadow(this, 'rotate', rotate);
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return shadow(this, 'rotate', rotate);
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},
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},
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getContentStream: function Page_getContentStream() {
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getContentStream: function Page_getContentStream() {
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var content = this.content;
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var content = this.content;
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var stream;
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var stream;
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@ -125,9 +139,10 @@ var Page = (function PageClosure() {
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}
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}
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return stream;
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return stream;
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},
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},
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loadResources: function(keys) {
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loadResources: function(keys) {
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if (!this.resourcesPromise) {
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if (!this.resourcesPromise) {
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// TODO: add async inheritPageProp and remove this.
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// TODO: add async getInheritedPageProp and remove this.
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this.resourcesPromise = this.pdfManager.ensure(this, 'resources');
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this.resourcesPromise = this.pdfManager.ensure(this, 'resources');
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}
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}
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var promise = new LegacyPromise();
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var promise = new LegacyPromise();
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@ -141,6 +156,7 @@ var Page = (function PageClosure() {
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}.bind(this));
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}.bind(this));
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return promise;
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return promise;
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},
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},
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getOperatorList: function Page_getOperatorList(handler, intent) {
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getOperatorList: function Page_getOperatorList(handler, intent) {
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var self = this;
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var self = this;
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var promise = new LegacyPromise();
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var promise = new LegacyPromise();
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@ -160,7 +176,7 @@ var Page = (function PageClosure() {
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'Pattern',
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'Pattern',
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'Shading',
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'Shading',
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'XObject',
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'XObject',
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'Font',
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'Font'
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// ProcSet
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// ProcSet
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// Properties
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// Properties
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]);
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]);
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@ -208,6 +224,7 @@ var Page = (function PageClosure() {
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return promise;
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return promise;
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},
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},
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extractTextContent: function Page_extractTextContent() {
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extractTextContent: function Page_extractTextContent() {
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var handler = {
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var handler = {
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on: function nullHandlerOn() {},
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on: function nullHandlerOn() {},
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