CN102306143A - Method and system for generating and editing PDF (portable document format) document - Google Patents
Method and system for generating and editing PDF (portable document format) document Download PDFInfo
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Abstract
The invention discloses a PDF (portable document format) document. The PDF document comprises a PDF layout stream layer which is used for describing by using abstract syntax based on an image model, a high-level abstract content layer which is arranged on the layout stream layer and comprises logical information of document contents, a PDF object layer which is arranged below the layout stream layer and complies with PDF grammar norms and a document binary stream layer which is arranged below the PDF object layer. The invention also discloses a method and system for generating and editing the PDF document. According to the PDF document as well as the method and system for generating and editing the PDF document disclosed by the invention, the PDF document can be edited, the editability similar to that of doc documents can be realized, and the paragraph contents, formats, pictures and the like in the PDF document can be edited.
Description
Technical field
The present invention relates to PDF (Portable Document Format) file processing field, more particularly, relate to the method and system that a kind of PDF document generates, edits
Background technology
As everyone knows, PDF full name Portable Document Format is translated into Portable Document format, is a kind of electronic document format.This file layout and operating system platform are irrelevant, that is to say, pdf document is no matter be at Windows, and Unix is general in the Mac of Apple OS operating system still.This performance makes it become the desirable document format that on Internet, carries out electronic document distribution and digital information propagation.Increasing e-book, the description of product, company's proclamation, network data, Email are brought into use the PDF file.
Pdf document is the basis with PostScript sound image model, uses abstract syntax to come description document.Comprised many abstract objects in the pdf document, like literal (text), figure (graphic), image (image) etc., these objects have been described full page jointly.Through these objects, the display message of full page is completely fixed, like page layout, form etc.This has realized the independence of PDF, is promptly all showing in an identical manner on the platform arbitrarily.
But the maximum difference of editing files such as pdf document and .doc .html is that the former belongs to format stream (Display Stream), and the latter belongs to content stream (Content Stream).
In the doc file, only comprise content and do not had display message such as layout.How to show on screen that the doc file by CLIENT PROGRAM (Consumer Application), calculates like MS Word based on contextual information, file content, paragraph format in real time.So, maybe be different for demonstration with the different CLIENT PROGRAM of a file, show not necessarily just the same like MS Word and Open Office.So the content stream file can't guarantee portability.But because a file content, thus will be to Edition Contains, revise just very conveniently, how to show that as for amended content CLIENT PROGRAM is layout again.
In pdf document, then comprised display message completely, like the layout of each page, each word is at the displaing coordinate of the page, with what font shows, with which type of font shows, font size is as how.Each is opened page and has all comprised display message completely, so no matter on platform arbitrarily, pdf document all is to show in an identical manner, difference to some extent not.
This method has guaranteed the portability of pdf document, but also makes it lose editability.Such as certain part of having deleted the pdf document Chinese version, then the displaing coordinate of the text after it all will remodify.
Some present PDF softwares for editing, the just object of PDF itself that it is edited is as adding text, picture, font or the like.These editors to as if do not comprise structural information, do not belong to the category of text editing, can't accomplish like the editor as the MS Word, like deletion, change paragraph, fill form etc.
Summary of the invention
The technical matters that the present invention will solve is, provides a kind of editable PDF document to generate, reach editor's method and system.
The invention discloses a kind of PDF document; Comprise with the iconic model being the basis; The format fluid layer of the PDF that the use abstract syntax is described; The higher level of abstraction content layer of include file content logic information is set on described format fluid layer, the PDF object layer that comprises the PDF grammar object is set under described format fluid layer, file scale-of-two fluid layer is set under described PDF object layer.
In PDF document of the present invention, said file content logical message comprises: paragraph, form, figure, image and the multiple form of definition, attribute in paragraph, form, figure, image.
In PDF document of the present invention; But described higher level of abstraction content layer is the content of edit logical layer; When needs are edited PDF; Revise the higher level of abstraction content layer, through format fluid layer and PDF object layer modification is delivered to file scale-of-two fluid layer then, generate new pdf document and replace former PDF document.
The invention discloses a kind of method of the PDF of generation document, be used to generate the described PDF document of claim 1, comprising:
A1., the higher level of abstraction content layer of include file content logic information is set;
A2. make up high-rise object at the higher level of abstraction content layer;
A3., the PDF object layer that comprises the PDF grammar object is set under the format fluid layer;
A4. described high-rise object is transformed into the PDF object layer through described format fluid layer, obtains the PDF object;
A5., file scale-of-two fluid layer is set under described PDF object layer;
A6. according to the PDF syntax gauge described PDF object is write file scale-of-two fluid layer.
In the method for generation of the present invention PDF document, when making up high-rise object in the said steps A 2, in the format fluid layer, add paragraph, form, figure, image at the higher level of abstraction content layer, and define various attributes, form.
In the method for generation PDF document of the present invention, described PDF object comprises PDF text object, PDF Drawing Object etc.
In the method for generation PDF document of the present invention, also comprise steps A 21 after the steps A 2, preserve described high-rise object.
The invention discloses a kind of system of the PDF of generation document, be used to realize the method for the generation PDF described in the technique scheme, comprising:
Higher level of abstraction content layer unit is set, is used to be provided with the higher level of abstraction content layer of include file content logic information;
Make up high-rise object unit, link to each other, be used for making up high-rise object at the higher level of abstraction content layer with the described abstract content layer of the higher level of abstraction content layer unit that is provided with;
PDF object layer unit is set, links to each other, be used under the format fluid layer, being provided with the PDF object layer that meets the PDF syntax gauge with the high-rise object unit of described structure;
Obtain the PDF object unit, link to each other, be used for described high-rise object is transformed into the PDF object layer through described format fluid layer, obtain the PDF object with the described PDF of setting object layer unit;
File scale-of-two fluid layer unit is set, links to each other, be used under described PDF object layer, being provided with file scale-of-two fluid layer with described acquisition PDF object unit;
Write the PDF object unit, link to each other, be used for described PDF object being write file scale-of-two fluid layer according to the PDF syntax gauge with the described file scale-of-two fluid layer unit that is provided with.
In the system of generation PDF document of the present invention, the high-rise object unit of described structure comprises paragraph subelement, form subelement, figure subelement, image subelement.
In the system of generation PDF document of the present invention, described PDF object layer comprises PDF text object subelement, PDF Drawing Object subelement etc.
In the system of generation PDF document of the present invention, the system of described generation PDF document is business hall user's flow system.
The invention discloses a kind of method of the PDF of editor document, be used to edit the PDF document described in the technique scheme, comprising:
B1. read the high-rise object of abstract content layer information architecture;
B2. described high-rise object is made amendment;
B3. the variation with high-rise object is delivered to file scale-of-two fluid layer;
B4. the pdf document that generates modification is to replace former PDF document.
In the method for editor PDF document of the present invention, also comprise step B21 between step B2 and the step B3, preserve described high-rise object.
In the method for editor PDF document of the present invention, said step B2 comprises: the high-rise object of reduction original from the high-rise object information of preserving, add, revise, delete, edit it.
The invention discloses a kind of system of the PDF of editor document, be used to realize the method for above-mentioned editor PDF document, comprising:
Read high-rise object unit, be used to read the high-rise object of abstract content layer information architecture;
Revise high-rise object unit, read high-rise object unit and link to each other, be used for described high-rise object is made amendment with described;
Transmit high-rise object unit, link to each other, be used for the variation of high-rise object is delivered to file scale-of-two fluid layer with the high-rise object unit of described modification;
Generate the pdf document unit of revising, link to each other with the high-rise object unit of described transmission, the pdf document that is used to generate modification is to replace former PDF document.
In the system of editor PDF document of the present invention, also comprise and preserve high-rise object unit, be used to preserve described high-rise object.
In the system of editor PDF document of the present invention, the system of described editor PDF document is business hall salesman's flow system.
The PDF document of embodiment of the present invention, the method and system of generation and editor PDF document has following beneficial technical effects:
Through adding the higher level of abstraction object layer, realized the editability of pdf document indirectly, make pdf document to revise;
Through adding the dirigibility that indirect layer has strengthened pdf document.Also more convenient, understanding easily on generating.
Description of drawings
Fig. 1 is a kind of PDF file structure of the present invention block scheme;
Fig. 2 is a kind of generation of embodiment of the invention PDF document method workflow diagram;
Fig. 3 is a kind of generation of embodiment of the invention PDF document system block diagram;
Fig. 4 is a kind of editor of embodiment of the invention PDF document method workflow diagram;
Fig. 5 is a kind of editor of embodiment of the invention PDF document system block diagram;
Fig. 6 a generates the process flow diagram that the PDF document system is applied to the business hall for the present invention;
Fig. 6 b edits the process flow diagram that the PDF document system is applied to the business hall for the present invention.
Embodiment
By specifying technology contents of the present invention, structural attitude, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 1, a kind of PDF file structure of the present invention block scheme comprises: the format fluid layer 20 of higher level of abstraction content layer 10, PDF, PDF object layer 30, file scale-of-two fluid layer 40.The format fluid layer 20 of PDF is to be the basis with PostScript sound image model; Use abstract syntax to describe the format fluid layer; The higher level of abstraction content layer 10 of include file content logic information is set on the format fluid layer 20 of PDF; The file content logical message is specifically: paragraph, form, figure, image and in paragraph, form, figure, image the multiple form of definition, attribute, that is, and in this layer building abstract object; Like paragraph, form, figure, image etc., in object, define various forms, attribute etc. simultaneously; Format fluid layer at PDF is provided with the PDF object layer 30 that comprises the PDF grammar object 20 times, converts high-rise object into the PDF object at PDF object layer 30, calculates various layout informations simultaneously.At the PDF object layer file scale-of-two fluid layer 40 is set for 30 times, generates final pdf document according to the PDF grammer.
But higher level of abstraction content layer 10 is the content of edit logical layer; When needs are edited PDF, revise higher level of abstraction content layer 10, through format fluid layer 20 and PDF object layer 30 modification is delivered to file scale-of-two fluid layer 40 then; Generate new pdf document, replace old file.
See also Fig. 2, a kind of generation PDF document method workflow diagram comprises:
A1., the higher level of abstraction content layer of include file content logic information is set;
By common practise, we can know, content stream can edit be because its with content and display separation, based on context display message is calculated by CLIENT PROGRAM.Pdf document is a format stream, has only display message, and not substantial logical message can't know oneself whether to have comprised a paragraph such as pdf document, and paragraph format is as how.The present invention so add a layer indirectly, makes up a higher level of abstraction content layer in order to realize the editable purpose of pdf document on the PDF object, wherein comprised the content logic information of file.The higher level of abstraction content layer is the content logic layer, in this layer building abstract object, like paragraph, form, figure, image etc., in object, defines various forms, attribute etc. simultaneously.
A2. make up high-rise object at the higher level of abstraction content layer;
Make up high-rise object at abstract content layer, as MS Word, can in the format fluid layer, add paragraph, form, figure, image etc. in the PDF document, and define various attributes, form etc.; For realizing editability and historical record, also comprise steps A 21, preserve high-rise object information.
A3., the PDF object layer that comprises the PDF grammar object is set under the format fluid layer;
The PDF object comprises PDF text object, PDF Drawing Object etc.
A4. described high-rise object is transformed into the PDF object layer through described format fluid layer, obtains the PDF object;
The PDF object layer converts high-rise object into the PDF object, calculates various layout informations simultaneously;
A5., file scale-of-two fluid layer is set under described PDF object layer;
A6. according to the PDF syntax gauge described PDF object is write file scale-of-two fluid layer.
That is: the PDF object is write final file binary stream, generate pdf document.
See also Fig. 3, a kind of generation PDF document system block diagram comprises:
Higher level of abstraction content layer unit 50 is set, makes up high-rise object unit 60, PDF object layer unit 70 is set, obtains PDF object unit 80, file scale-of-two fluid layer unit 90 is set, writes PDF object unit 100.
Native system is used to realize the described method of embodiment two technical schemes, and the abstract content layer of higher level of abstraction content layer unit 50 is set, and is used to be provided with the higher level of abstraction content layer of include file content logic information; Make up high-rise object unit 60, and the abstract content layer of higher level of abstraction content layer Unit 50 are set link to each other, be used for making up high-rise object at the higher level of abstraction content layer; PDF object layer unit 70 is set, links to each other, be used under the format fluid layer, being provided with the PDF object layer that comprises the PDF grammar object with the high-rise object unit 60 of structure; Obtain PDF object unit 80, and PDF object layer unit 70 is set links to each other, be used for described high-rise object is transformed into the PDF object layer through described format fluid layer acquisition PDF object; File scale-of-two fluid layer unit 90 is set, links to each other, be used under described PDF object layer, being provided with file scale-of-two fluid layer with acquisition PDF object unit 80; Write PDF object unit 100, and file scale-of-two fluid layer unit 90 is set links to each other, be used for described PDF object being write file scale-of-two fluid layer according to the PDF syntax gauge.
In the system of generation PDF document of the present invention, make up high-rise object unit 60 and comprise paragraph subelement, form subelement, figure subelement, image subelement.
Generate in the system of PDF document in the present invention, the PDF object layer comprises PDF text object subelement, PDF Drawing Object subelement etc.
See also Fig. 4, a kind of editor PDF document method workflow diagram is used to edit PDF document of the present invention, comprising:
B1. read the high-rise object of abstract content layer information architecture;
Abstract content layer object class is similar to the doc file, can generate the paragraph of attributes such as having any font, specific format, inserts the form with specific format, inserts figure, image etc., in one-piece construction, has only this layer visible to the user.The high-rise obj ect file of reading and saving according to the high-rise object of information restructural wherein, has so just obtained the content logic information in the original.
B2. described high-rise object is made amendment;
When having reduced the high-rise object of file, can add, revise, delete it, modification such as edit.
B21. preserve described high-rise object;
B3. the variation with high-rise object is delivered to file scale-of-two fluid layer;
B4. the pdf document that generates modification is to replace former PDF document.
This edit methods, its essence is: read high-rise object information, the high-rise object of reconstruct is edited, is revised high-rise object, and variation is delivered to bottom, generates the pdf document of upgrading, and realizes editability.
See also Fig. 5; A kind of editor PDF document system; Comprise: be used to realize that the present invention edits the PDF document method, comprise: read high-rise object unit 110, revise high-rise object unit 120, preserve high-rise object unit 130, transmit high-rise object unit 140, generate the pdf document unit of revising 150.Read high-rise object unit 110, be used to read the high-rise object of abstract content layer information architecture; Revise high-rise object unit 120, and read high-rise object unit 110 and link to each other, be used for described high-rise object is made amendment; Preserve high-rise object unit 130, link to each other, be used to preserve described high-rise object, transmit high-rise object unit 140, link to each other, be used for the variation of high-rise object is delivered to file scale-of-two fluid layer with the high-rise object unit 120 of modification with the high-rise object unit 120 of modification; Generate the pdf document unit of revising 150, link to each other with the high-rise object unit 140 of transmission, the pdf document that is used to generate modification is to replace former PDF document.
The present invention can be applicable to telecommunication business Room flow process, and the left side is user's flow process, and it is professional to belong to the foreground, is the pdf document product process; The right side is salesman's flow process, and it is professional to belong to the backstage, is pdf document editor flow process.
The user gets into the business hall transacting business.At first be connected into the single webpage of worker, browse whole webpage, professional beginning; Then convert this webpage into pdf document on the backstage, product process is seen Fig. 6 a.
Then, the user fills in personal information in webpage.Obtain information on the backstage and original pdf document is edited, add the userspersonal information, editor's flow process is seen Fig. 6 b.
End user's testing personal information is errorless, signature then, and the editing pdfs once more on the backstage adds digital signature and seal, generates final pdf document.The user leaves, service ending, pdf document warehouse-in.
In a word, the present invention proposes a kind of method cleverly, and making pdf document become can edit, and realizes and editor's property of doc document similarity, can edit paragraphs, form, form, picture or the like in the existing file.
The PDF document of embodiment of the present invention, the method and system of generation and editor PDF document has following beneficial technical effects:
Through adding the higher level of abstraction object layer, realized the editability of pdf document indirectly, make pdf document to revise;
Through adding the dirigibility that indirect layer has strengthened pdf document; Also more convenient, understanding easily on generating.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (17)
1. PDF document; Comprise with the iconic model being the basis; The format fluid layer of the PDF that the use abstract syntax is described is characterized in that, the higher level of abstraction content layer of include file content logic information is set on described format fluid layer; The PDF object layer that meets the PDF syntax gauge is set under described format fluid layer, file scale-of-two fluid layer is set under described PDF object layer.
2. PDF document according to claim 1 is characterized in that, said file content logical message comprises: paragraph, form, figure, image and the multiple form of definition, attribute in paragraph, form, figure, image.
3. PDF document according to claim 1 and 2; It is characterized in that, but described higher level of abstraction content layer is the content of edit logical layer, when needs are edited PDF; Revise the higher level of abstraction content layer; Through format fluid layer and PDF object layer modification is delivered to file scale-of-two fluid layer then, generates new pdf document, replace old file.
4. a method that generates the PDF document is used to generate the described PDF document of claim 1, it is characterized in that, comprising:
A1., the higher level of abstraction content layer of include file content logic information is set;
A2. in the higher level of abstraction content layer of include file content logic information, make up high-rise object;
A3., the PDF object layer that meets the PDF syntax gauge is set under the format fluid layer;
A4. described high-rise object is transformed into the PDF object layer through described format fluid layer, obtains the PDF object;
A5., file scale-of-two fluid layer is set under described PDF object layer;
A6. according to the PDF syntax gauge described PDF object is write file scale-of-two fluid layer.
5. the method for generation according to claim 4 PDF document is characterized in that, when making up high-rise object in the said steps A 2, in the format fluid layer, adds paragraph, form, figure, image at the higher level of abstraction content layer, and defines various attributes, form.
6. according to the method for claim 4 or 5 described generation PDF documents, it is characterized in that described PDF object comprises PDF text object, PDF Drawing Object.
7. the method for generation PDF document according to claim 4 is characterized in that, also comprises after the steps A 2 and preserves described high-rise object.
8. system that generates the PDF document is used to the method that realizes that claim 4 is described, it is characterized in that, comprising:
Higher level of abstraction content layer unit is set, is used to be provided with the higher level of abstraction content layer of include file content logic information;
Make up high-rise object unit, link to each other, be used for making up high-rise object at the higher level of abstraction content layer with the described abstract content layer of the higher level of abstraction content layer unit that is provided with;
PDF object layer unit is set, links to each other, be used under the format fluid layer, being provided with the PDF object layer that comprises the PDF grammar object with the high-rise object unit of described structure;
Obtain the PDF object unit, link to each other, be used for described high-rise object is transformed into the PDF object layer through described format fluid layer, obtain the PDF object with the described PDF of setting object layer unit;
File scale-of-two fluid layer unit is set, links to each other, be used under described PDF object layer, being provided with file scale-of-two fluid layer with described acquisition PDF object unit;
Write the PDF object unit, link to each other, be used for described PDF object being write file scale-of-two fluid layer according to the PDF syntax gauge with the described file scale-of-two fluid layer unit that is provided with.
9. the system of generation PDF document according to claim 8 is characterized in that the high-rise object unit of described structure comprises paragraph subelement, form subelement, figure subelement, image subelement.
10. according to Claim 8 or the systems of 9 described generation PDF documents, it is characterized in that described PDF object layer comprises PDF text object subelement, PDF Drawing Object subelement.
11. the system of generation PDF document according to claim 8 is characterized in that, the system of described generation PDF document is business hall user's flow system.
12. a method of editing the PDF document is used to edit the described PDF document of claim 1, it is characterized in that, comprising:
B1. read the high-rise object of abstract content layer information architecture in the former PDF document;
B2. described high-rise object is made amendment;
B3. the variation with high-rise object is delivered to file scale-of-two fluid layer;
B4. the pdf document that generates modification is to replace former PDF document.
13. the method for editor PDF document according to claim 12 is characterized in that, also comprises after the step B2 and preserves described high-rise object.
14. the method for editor PDF document according to claim 12 is characterized in that said step B2 comprises: the high-rise object of reduction original from the high-rise object information of preserving, add, revise, delete, edit it.
15. a system that edits the PDF document is used to the method that realizes that claim 12 is described, it is characterized in that, comprising:
Read high-rise object unit, be used to read the high-rise object of abstract content layer information architecture;
Revise high-rise object unit, read high-rise object unit and link to each other, be used for described high-rise object is made amendment with described;
Transmit high-rise object unit, link to each other, be used for the variation of high-rise object is delivered to file scale-of-two fluid layer with the high-rise object unit of described modification;
Generate the pdf document unit of revising, link to each other, be used to generate the pdf document of modification, to replace former PDF document with the high-rise object unit of described transmission.
16. the system of editor PDF document according to claim 15 is characterized in that, also comprises and preserves high-rise object unit, is used to preserve described high-rise object.
17. the system of editor PDF document according to claim 15 is characterized in that, the system of described editor PDF document is business hall salesman's flow system.
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