CN102508887A - System and method for resolving digital television interaction service markup language - Google Patents
System and method for resolving digital television interaction service markup language Download PDFInfo
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- CN102508887A CN102508887A CN2011103190610A CN201110319061A CN102508887A CN 102508887 A CN102508887 A CN 102508887A CN 2011103190610 A CN2011103190610 A CN 2011103190610A CN 201110319061 A CN201110319061 A CN 201110319061A CN 102508887 A CN102508887 A CN 102508887A
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Abstract
The invention discloses a system and a method for resolving a digital television interaction service markup language. The system mainly comprises a communication management module, a label resolving module, a Dom module, a Render module and a layout management module. The invention also discloses the method for resolving the digital television interaction service markup language. The method mainly comprises the following steps of: acquiring corresponding website resource information flows; identifying label information in network resource information; resolving the acquired network resource information into label flows, marking special labels for the digital television interaction service markup language, and generating a Dom tree through a Dom Builder according a legal hypertext markup language (html) rule; and transmitting the Dom three to a Layout Engine for performing layout, constructing a Render tree on the constructed DOM tree so as to realize webpage rendering, and adding node position coordinates and color type setting information. According to the system and the method, not only can the resolving efficiency of a set top box browser be improved effectively, but also the digital television interaction service markup language can be supported completely.
Description
Technical field
The present invention relates to the digital television techniques field, relate in particular to a kind of digital television interactive service mark language resolution system and method.
Background technology
In the digital home field, application and service has very great demand to the user for digital television interaction.Yet the page of using for digital television interaction at present appears and does not have unified standard; There is very large difference in each manufacturer, also concrete with each manufacturer equipment and the hardware close-coupled of implementation that the while page appears at aspects such as page rendering, the parsing of page marks element, page info exchange and transmission.Because the disunity of page marks technology and implementation; Caused same service and application on the terminal device of different vendor, not to move; And also be difficult to the exchange of the shared and data of the information of carrying out between the different application and service, this has hindered the development of digital television interaction application and service greatly and has popularized.
Present most of browser major part all is based on the application on PC or the mobile phone; Cause the analytics engine of its core can not well be applied on our the digital television interactive service mark language; The core of these browsers is supported incomplete to DTV interactive service SGML; These engine major parts all will take a large amount of computer resources simultaneously; Be not suitable for less this characteristic of embedded resource, the existing software optimization method very big to a certain extent and be not suitable for all embedded systems, along with deepening continuously of its application; Optimization method for software can not well satisfy demands of applications, and only the cutting of application programs is not enough with optimizing.And in the applied environment of DTV; DTV STB is more just as a kind of terminal that the simple process ability is provided; The computing and the service logic that do not need dealing with complicated; Add popularization and the cost factor of considering DTV STB, STB is generally just as a kind of weak terminal device.This has caused can not being transplanted to smoothly on other the middleware platform to the application of certain middleware product exploitation.Therefore design and realize that one can be supported DTV interactive service SGML analytic model to seem particularly important.In research and practice process to the method, inventor of the present invention has invented a kind of digital television interactive service mark language resolution system and method.
Summary of the invention
Problem to prior art exists the present invention proposes a kind of digital television interactive service mark language resolution system and method.
A kind of digital television interactive service mark language (HSML) resolution system comprises: mainly comprise communication management module, label parsing module, Dom module, Render module and layout management module.
Communication management module is used to obtain Internet resources such as webpage, CSS, XML, picture, comprises cache management, prefetch process, submodules such as Network Transmission and underlying protocol.
The label parsing module is used for identification label, and webpage is resolved to label stream, and the label that belongs to the special usefulness of digital television interactive SGML is carried out mark.
The dom tree generation module is used to make up dom tree, at first generates this node according to label stream, obtains father node then and its son that joins father node in the middle of some, is connect down also and will be connected to its brotgher of node.
Render tree generation module is on the basis of dom tree, to realize playing up of webpage; But be not on dom tree, directly to rewrite, but generate one tree in addition, generative process and DOM are similar; At first to generate this node; Obtain father node then and its son that joins father node in the middle of some, will be connected to its brotgher of node simultaneously, also should be connected to corresponding dom tree node in addition; Then adding the position coordinates of node, composition information such as color.
The result of layout management module to resolving, the dom tree that does not promptly comprise positional information carries out the processing of aspects such as position calculation, arrangement of elements.
Optional, the dom tree generation module will realize also and the cooperation of Render tree module that for the situation that contains JS in the webpage, it also will call the JS engine, and utilizes its analysis result to improve dom tree.
Optional, the layout management module need calculate position and the arrangement mode that needs each object of demonstration in the page; The result of layout management module generates the Render tree according to dom tree, and makes all nodes in the Render tree all be filled positional information, then it is presented at it on screen.
Optional, the parsing of digital television interactive service mark language mainly comprises lexical analysis, grammatical analysis and semantic analysis three phases, so the core of HSML resolver is Lexical Analysis Module, syntax Analysis Module and semantic module.
Optional, it must be effective document that HSML requires the HSML document, so the rule that defines in also need be according to the HSMLDTD document before the beginning lexical analysis is carried out validity check to document.
Optional, the HSML resolver semantic analysis and the processing stage can call other parsing module with other middleware or application interface the HSML tagged element is resolved and is handled.
Optional; In the process that HSML resolves; Any one symbol for input has only a conversion at most, and for any one character string of confirming of reading in; Can only point to a definite state at most, therefore whole resolving adopts a definite type finte-state machine (DFA) model to describe.
A kind of digital television interactive service mark language (HSML) analytic method may further comprise the steps:
S01: obtain corresponding website resource information stream;
S02: the label information in the recognition network resource information, the network resource information that obtains is resolved to label stream, the label that belongs to the special usefulness of digital television interactive SGML is carried out mark, generate the Dom tree through Dom Builder by legal html standard;
S03: pass to LayoutEngine to Dom, carry out layout,, just resolve through CSSParser if the CSS pattern is arranged;
S04: on the dom tree that makes up, make up the Render tree, realize playing up of webpage, add node location coordinate and color composition information; Each just Render node of a correspondence of triggering establishment of a dom tree node of creating is realized the simultaneous growth of dom tree and Render tree.
Wherein, site resource information comprises Internet resources such as obtaining webpage, CSS, XML, picture among the step S01, and acquisition process and resolving are carried out simultaneously, from meshwork buffering, reads a secondary data at every turn, just can trigger analytics engine and carry out one parsing.
Wherein, for the situation that contains JS in the webpage, it also will call the JS engine among the step S02, and utilizes its analysis result to improve dom tree.
The present invention implements a kind of digital television interactive service mark language resolution system and method are provided, and not only can effectively improve the analyzing efficiency of set box browser, and can support DTV interactive service SGML fully.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is digital television interactive service mark language process of analysis figure among the present invention;
Fig. 2 is a digital television interactive service mark language resolution system structural drawing among the present invention;
Fig. 3 is the graph of a relation between HSML resolver framework of the present invention and HSML resolver and other parsing module.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
This paper studies and designs label and interface that DTV interactive service SGML (HSML) is supported on the basis of extensible HyperText Markup Language (XHTML1.0).Information exchange system and the Analytic principle used through research HSML, with the resolving of HSML abstract be a definite type finite automata model.Method of the present invention comprises: network resource management, and to the parsing of digital television interactive service mark language web page label, the generation of the dom tree of simplification and Render tree.Technical scheme of the present invention can realize the support fully of DTV interactive service SGML and efficient the parsing.
Digital television interactive service mark language process of analysis of the present invention is as shown in Figure 1, comprises the steps:
S01: obtain corresponding website resource information stream; Here mainly be to obtain Internet resources such as webpage, CSS, XML, picture.Acquisition process and resolving are carried out simultaneously.From meshwork buffering, read a secondary data at every turn, just can trigger analytics engine and carry out one parsing.
S02: the label information in the recognition network resource information, the network resource information that obtains is resolved to label stream, the label that belongs to the special usefulness of digital television interactive SGML is carried out mark, generate the Dom tree through Dom Builder by legal html standard; Wherein, for the situation that contains JS in the webpage, it also will call the JS engine, and utilizes its analysis result to improve dom tree.
S03: pass to LayoutEngine to Dom, carry out layout,, just resolve through CSSParser if the CSS pattern is arranged.
S04: on the dom tree that makes up, make up the Render tree, realize playing up of webpage, add node location coordinate and color composition information.Each just Render node of a correspondence of triggering establishment of a dom tree node of creating is realized the simultaneous growth of dom tree and Render tree.
The framework of DTV SGML analytic model and common built-in browser is similar, and is as shown in Figure 2, mainly comprises communication management module, label parsing module, Dom module, Render module and layout management module.
Communication management module is mainly used in Internet resources such as obtaining webpage, CSS, XML, picture. comprise cache management, prefetch process, submodules such as Network Transmission and underlying protocol.So that reach better effect, do not need whole Internet resources all to download to finish to begin to resolve, but while downloading the dynamic process of parsing.Thereby need a buffer zone to realize the synchronous of network portion and other parts.
The label parsing module is mainly used in identification label, and webpage is resolved to label stream, and the label that belongs to the special usefulness of digital television interactive SGML is carried out mark.
The dom tree generation module is mainly used in the structure dom tree, at first generates this node according to label stream, obtains father node then and its son that joins father node in the middle of some, is connect down also and will be connected to its brotgher of node.In addition the dom tree generation module also will be realized and the cooperation of Render tree module, and for the situation that contains JS in the webpage, it also will call the JS engine, and utilizes its analysis result to improve dom tree.
Render tree generation module mainly is on the basis of dom tree, to realize playing up of webpage; But be not on dom tree, directly to rewrite, but generate one tree in addition, generative process and DOM are similar; At first to generate this node; Obtain father node then and its son that joins father node in the middle of some, will be connected to its brotgher of node simultaneously, also should be connected to corresponding dom tree node in addition.Then adding the position coordinates of node, composition information such as color.
The layout management module is mainly carried out the processing of aspects such as position calculation, arrangement of elements to the result's (dom tree that does not promptly comprise positional information) who resolves.Layout management need calculate position and the arrangement mode that needs each object of demonstration in the page.The result of layout management module generates the Render tree according to dom tree, and makes all nodes in the Render tree all be filled positional information, then it is presented at it on screen.
The parsing of HSML mainly comprises lexical analysis, grammatical analysis and semantic analysis three phases, so the core of HSML resolver is Lexical Analysis Module, syntax Analysis Module and semantic module.To require the HSML document must be effective document (valid document) to HSML in addition, so the rule that defines in also need be according to HSML DTD document before the beginning lexical analysis is carried out validity check to document.Relation between HSML resolver framework and HSML resolver and other parsing module is as shown in Figure 3, the HSML resolver semantic analysis and the processing stage can call other parsing module with other middleware or application interface the HSML tagged element is resolved and is handled.
In the process that HSML resolves, any one symbol for input has only a conversion at most, and for the character string of confirming that any one reads in, can only point to a definite state at most.Therefore whole resolving can adopt a definite type finte-state machine (DFA) model to describe.
(deterministic finite automation DFA) is the automat that can realize state transitions to a definite type finite-state automata.For a given state that belongs to this automat and a character that belongs to this automat alphabet ∑, it can both transfer to next state (this state might be exactly previous that state) according to prior given transfer function.A DFA can adopt the form of a five-tuple to represent: A=(Q; ∑, δ, s; F); Wherein Q is a non-NULL finite state set, and ∑ is an input alphabet (the non-NULL limited character set closes in other words), and δ: Q * ∑ → Q is a state transition function; S ∈ Q is an initial state,
be that accepting state is gathered.The DFA model that HSML resolves can use five-tuple A=(Q, ∑, δ, s F) is expressed as:
Q＝{S_Start，S_Other，S_XMLDeclare，S_Doctype，S_HTMLRootStartTag，S_Error，S_HSMLStartTag，S_HSMLContent，…，S_End}；
∑＝{“<?xml”，“<！--”，“<！DOCTYPE”，“<html”，“<html”，“<hsml”，“</>”，“/”，“</>html”}；
δ: if (condition) S
1→ S
2, S wherein
1, S
2∈ Q, condition is true when character string q ∈ ∑ and the character string on the state transitions arrow of input are complementary;
s：S_Start；
F＝{S_Start，S_End，S_Error}；
When the character string of being indicated on character string of reading in and the arrow is complementary, just forward next state to according to arrow points, what wherein otherwise represented is the state that turns to when not satisfying other condition.In this DFA model, respectively XML statement, Doctype DTD, HSML tag element and html tag element are resolved and are handled, wherein run into comment section (promptly "!--" part of beginning) will directly skip and not process.The DFA model that HSML resolves can use algorithmic notation to be:
Because the HSML of this paper definition is the expansion on the XHTML basis of setting up; So this automaton model has only been explained in traditional HTML resolution system; How to add the HSML parsing module HSML element of expanded definition is resolved, and do not discuss parsing situation CSS (CSS) and script (like Javascript).Because HSML does not make amendment to CSS and script and expands, get final product so only need adopt corresponding parsing module in the common html parser that they are resolved.
The present invention implements a kind of digital television interactive service mark language resolution system and method are provided, and not only can effectively improve the analyzing efficiency of set box browser, and can support DTV interactive service SGML fully.
More than to a kind of digital television interactive service mark language resolution system and method that the embodiment of the invention provided; Carried out detailed introduction; Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a digital television interactive service mark language (HSML) resolution system is characterized in that, comprising: mainly comprise communication management module, label parsing module, Dom module, Render module and layout management module;
Communication management module is used to obtain Internet resources such as webpage, CSS, XML, picture, comprises cache management, prefetch process, submodules such as Network Transmission and underlying protocol;
The label parsing module is used for identification label, and webpage is resolved to label stream, and the label that belongs to the special usefulness of digital television interactive SGML is carried out mark;
The dom tree generation module is used to make up dom tree, at first generates this node according to label stream, obtains father node then and its son that joins father node in the middle of some, is connect down also and will be connected to its brotgher of node;
Render tree generation module is on the basis of dom tree, to realize playing up of webpage; But be not on dom tree, directly to rewrite, but generate one tree in addition, generative process and DOM are similar; At first to generate this node; Obtain father node then and its son that joins father node in the middle of some, will be connected to its brotgher of node simultaneously, also should be connected to corresponding dom tree node in addition; Then adding the position coordinates of node, composition information such as color;
The result of layout management module to resolving, the dom tree that does not promptly comprise positional information carries out the processing of aspects such as position calculation, arrangement of elements.
2. the system of claim 1 is characterized in that, in addition the dom tree generation module also will be realized and the cooperation of Render tree module, and for the situation that contains JS in the webpage, it also will call the JS engine, and utilizes its analysis result to improve dom tree.
3. the system of claim 1 is characterized in that, the layout management module need calculate position and the arrangement mode that needs each object of demonstration in the page; The result of layout management module generates the Render tree according to dom tree, and makes all nodes in the Render tree all be filled positional information, then it is presented at it on screen.
4. the system of claim 1; It is characterized in that; The parsing of digital television interactive service mark language mainly comprises lexical analysis, grammatical analysis and semantic analysis three phases, so the core of HSML resolver is Lexical Analysis Module, syntax Analysis Module and semantic module.
5. the system of claim 1 is characterized in that, it must be effective document that HSML requires the HSML document, so the rule that defines in also need be according to HSML DTD document before the beginning lexical analysis is carried out validity check to document.
6. like claim 1 or 4 described systems, it is characterized in that, the HSML resolver semantic analysis and the processing stage can call other parsing module with other middleware or application interface the HSML tagged element is resolved and is handled.
7. the system of claim 1; It is characterized in that, in the process that HSML resolves, for any one symbol of input; Has only a conversion at most; And for the character string of confirming that any one reads in, can only point to a definite state at most, therefore whole resolving adopts a definite type finte-state machine (DFA) model to describe.
8. a digital television interactive service mark language (HSML) analytic method is characterized in that, may further comprise the steps:
S01: obtain corresponding website resource information stream;
S02: the label information in the recognition network resource information, the network resource information that obtains is resolved to label stream, the label that belongs to the special usefulness of digital television interactive SGML is carried out mark, generate the Dom tree through Dom Builder by legal html standard;
S03: pass to LayoutEngine to Dom, carry out layout,, just resolve through CSSParser if the CSS pattern is arranged;
S04: on the dom tree that makes up, make up the Render tree, realize playing up of webpage, add node location coordinate and color composition information; Each just Render node of a correspondence of triggering establishment of a dom tree node of creating is realized the simultaneous growth of dom tree and Render tree.
9. method as claimed in claim 8 is characterized in that, site resource information comprises and obtains webpage among the step S01; CSS, XML, Internet resources such as picture; Acquisition process and resolving are carried out simultaneously, from meshwork buffering, read a secondary data at every turn, just can trigger analytics engine and carry out one parsing.
10. method as claimed in claim 8 is characterized in that, for the situation that contains JS in the webpage, it also will call the JS engine among the step S02, and utilizes its analysis result to improve dom tree.
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