CN102455909A - Method for asynchronously loading power point documents - Google Patents
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Abstract
The invention discloses a method for asynchronously loading power point documents, which is a thread management method for loading the power point documents by using an impress component in OpenOffice. The method comprises the following steps of: 1, introducing a document; 2, judging the document, contrasting through a power point filter and judging whether the document is a corresponding power point document; 3, if the document is the power point document, developing a new document resolving sub thread; and 4, after the document resolving sub thread resolves a document template, controlling to make a master thread execute continuously through a function so as to build and display a power point module view framework, and controlling the continuous interaction between the master thread for the view displaying and the resolving sub thread. When a large power point document is uploaded, a remarkable effect is achieved.
Description
Technical field
The present invention relates to document processing field, the method for the asynchronous loading of especially a kind of PowerPoint document.
Background technology
In people's daily study and work; Often need open and browse the PowerPoint document, carry out magic lantern and play, PowerPoint is as the cross-platform office software external member of a cover; Utilize the impress assembly among the OpenOffice can carry out the making of magic lantern, play.Open the PowerPoint document at present and mainly adopt following mode: at first carry out document and load parsing, show current loading progress through progress bar; Secondly at the document loaded, carry out the foundation of respective view framework and the view of document content again and show.In use, if load king-sized document, use complicated especially template like document; Comprise complicated ole object in the magic lantern, picture, animation; Sound element, magic lantern switching and complicated self-defined animation etc. are influenced by platform perhaps; Certainly will cause document to load slowly, period of reservation of number is long, influences user experience.
Therefore, how to improve loading velocity or how to make the viewer see document content as early as possible, and then improve user's service efficiency, become the technical matters that needs to be resolved hurrily.
Fig. 1 has roughly introduced one of the original loading of PowerPoint document roughly process, and original mode is: at first carry out document and import (step 1); Next carries out the relevant documentation form and judges (step 2); Carry out the magic lantern mother matrix and resolve (step 3); Parsing (the step 4) of concrete magic lantern page or leaf; Relevant teaching materials and remarks mother matrix are resolved (step 5); After document is resolved and finished, carry out the foundation and the respective view update displayed (step 6) of relevant view framework; Last document loaded (step 7).
Summary of the invention
The object of the present invention is to provide a kind of new PowerPoint document load mode,, can let the user see document content as early as possible, shorten the stand-by period greatly through said method.
In order to reach the foregoing invention purpose, the present invention adopts following technological means to reach, and specifically comprises as follows:
Utilize the impress assembly in the OpenOffice series, can open and preserve common PowerPoint presentation file;
Resolve the PowerPoint document and mainly resolve following content: magic lantern mother matrix, magic lantern page or leaf, teaching materials and attached NOTES teaching materials mother matrix; And the magic lantern format etc., the thinking here is before resolving inlet, opens up new sub-thread; With whole resolving, be placed in the sub-thread and carry out, main thread is responsible for view and is shown; The user can see document content very soon like this, and document is resolved and also carried out simultaneously on the backstage.
The explanation of nouns of the relevant technical terms that the present invention relates to:
OpenOffice: be the cross-platform office's software suite of a cover, can on operating systems such as Windows, Linux, MacOS X and Solaris, carry out.The main office's software suite of it and each is compatible.OpenOffice is a free software, and anyone can free download, use, and promote it.
Impress: be the application module among the OpenOffice, mainly be responsible for the making and the demonstration of PowerPoint, also comprise other application among the OpenOffice, like modules such as word processing, electrical form, drawing making and databases.
Osl::Thread: for being used for creating the class with management thread among the OpenOffice, member function create () is arranged in such, this function is used for creating thread, need be appreciated that here, through judging different systems, can call the function of corresponding establishment thread.So when creating thread, can consider the problem of plateform system.
Application::Reschedule (): through this function UI is sent message among the OpenOffice.
Magic lantern thumbnail: be the display part in the magic lantern panel in OpenOffice; Here can show the entire document content; Every page of magic lantern has corresponding thumbnail, can user friendlyly watch and use like this, clicks corresponding magic lantern thumbnail; Middle front view also has corresponding renewal, is consistent with thumbnail.
The method of the asynchronous loading of a kind of PowerPoint document that the present invention proposes is to use impress assembly among the OpenOffice to load the thread management method of PowerPoint document, and practical implementation comprises the steps:
One, at first carrying out document imports;
Two, carry out document and judge,, judge whether to be the corresponding document of PowerPoint through the contrast of PowerPoint filtrator, if otherwise walk former loading flow process;
If three is the PowerPoint document, opens up new document and resolve sub-thread;
Four, document is resolved sub-thread after the parse documents template finishes here, makes that through functions control main thread continues to be able to carry out, and PowerPoint module view framework is able to set up and shows, the main thread that the control view shows and the sub-thread of parse documents are constantly mutual;
Five, last document loaded.
In sum, the present invention is directed to when loading the big document of PowerPoint, remarkable result is arranged, and the present invention is applicable to all PowerPoint related patterns (PPT, PPTX, PPS, ODP, related patterns such as UOF).
Description of drawings
The process flow diagram that Fig. 1 loads for existing PowerPoint document;
Fig. 2 is the process flow diagram of the asynchronous loading of PowerPoint document of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 2 has introduced the PowerPoint document and has loaded improve one's methods one roughly process flow diagram.The embodiment that the present invention adopts is following:
(1) at first carries out document and import (step S1);
(2) carry out document and judge,, judge whether to be the corresponding document (step S2) of PowerPoint through the contrast of PowerPoint filtrator;
(3) if be the PowerPoint document, open up new thread (step S3), the following mode of main employing of opening up of thread: the establishment multithreading function that is directed against different platform among the OpenOffice; Carried out encapsulation again, here among type of the being defined in osl::Thread, before loading the magic lantern document; Through inheriting above-mentioned type; Utilize such Virtual Function void run () sub-thread of dishing out, when creating sub-thread, be actually to each thread and create global variable separately at TLS (Thread Local Storage); The committed memory piece is in case the data exception that thread synchronization causes.Under original single thread mode, the CPU time sheet is taken turns commentaries on classics in order, adopts multithreading here, can be so that the alternately wheel commentaries on classics of CPU time sheet.Here concrete document is resolved to be placed in the sub-thread and carry out.In original processing mode, be the binary documents form, according to Microsoft's corresponding binary documents form statement standard to the ppt document; OpenOffice carries out data processing to the ppt document, in the process that document is resolved, corresponding data is written in the internal memory, after the document parsing finishes; Be in the whole write memories of document data after, read internal storage data, carry out manifesting of view UI; And in of the present invention the improving one's methods, when in internal storage structure, writing data, carry out internal storage data to read; Be read-while-write, make the user can see document content very soon.On the switching mode between main thread and the sub-thread, mainly depend on some Rule of judgment, specifically in step (four), explanation is arranged;
(4) in concrete process of resolving to the PowerPoint document; At first the magic lantern mother matrix being resolved (step S31), mainly is through the binary documents format standard, reads binary stream information; Information data is put in the data model, for the view demonstration in later stage is got ready.This process holding time is less.Secondly the magic lantern page or leaf is resolved (step S32), Analytic principle is the same.Here after magic lantern parsing one page finishes, make that through functions control main thread continues to be able to carry out, PowerPoint module view framework is able to set up.The user can see document content very soon like this.Because concrete magic lantern page or leaf is resolved the holding time plenty of time; Add top view simultaneously and resolve the constantly mutual of thread, make the overall time be necessary to control, be directed against this situation among the present invention; Following thinking is proposed: in document resolving; Increase condition judgment (step S321), shorten the overall load time, have only and satisfy following condition: (a) the magic lantern page or leaf is resolved half the; (b) the magic lantern page or leaf is resolved and is finished; (c) magic lantern is in rolling condition in the magic lantern thumbnail.One of them the time, carry out magic lantern again and upgrade, the magic lantern page or leaf of promptly having resolved all manifests (step S5) in thumbnail.Wherein the concrete realization of above-mentioned condition is following: about condition (a) and (b), in sub-thread, owing to concrete magic lantern resolved to be placed in the for cyclical function carry out, can learn whether resolve half thely through cycle count, perhaps resolve and finish; About condition (c), in the response function that scroll bar drags, increase variable and judge, be set to very at the function entrance variable; Outlet is made as vacation, and response function that scroll bar drags and document are resolved and in same thread, do not carried out, and in sub-thread, can obtain above-mentioned variable; If be true; Explaining that scroll bar is dragged begins to carry out response function, makes sub-thread resolve so and is able to slow down, and specifically has hereinafter in (4) point of several major issues in need considering to be described.Caching mechanism is adopted in the demonstration of magic lantern thumbnail, whole the manifesting here, will write the data in the buffer memory in fact exactly, and carry out reading displayed, concrete is exactly that the view that is directed against magic lantern page or leaf in the magic lantern thumbnail manifests.
(5) last document loaded (step S6).
When the user opens corresponding PowerPoint document, can see document content very soon, when dragging scroll bar, the magic lantern thumbnail can carry out corresponding renewal.In the document loading procedure, can carry out magic lantern simultaneously and play, the user carries out document when mutual, and the backstage is being carried out document always and is being loaded.
In this process, have several major issues to need to consider:
(1) loads the speed-raising problem.Here consider mainly that the renewal to thumbnail can consume the plenty of time; The flow process that some repetitions are also arranged simultaneously; In order to accelerate the overall loading velocity of magic lantern document; The thinking is here carried out the renewal of magic lantern thumbnail exactly when the user begins to drag scroll bar, can significantly shorten the load time of entire chapter document like this.
(2) magic lantern replacement problem.In the magic lantern loading procedure, play if carry out magic lantern, can find this moment; Magic lantern broadcast meeting is withdrawed from very soon, and for example, the entire chapter document has 100 pages; When document is resolved to 20 pages, carries out magic lantern and play, when magic lantern is played to 20 pages; Will withdraw from, the method for considering here is, when magic lantern is played to page or leaf last; Obtain the magic lantern number of pages of having resolved through internal storage data, the magic lantern number of pages when itself and magic lantern are begun to play compares, and wherein the magic lantern number of pages is specifically obtained and adopted following mode: in OpenOffice, can obtain through the member function GetSdPageCount () among type of the calling SdDrawDocument.If the inconsistent explanation of magic lantern number of pages when magic lantern number of pages of having resolved and magic lantern begin to play has new parsing; If resolve because document takes place in this process; Will in the ephemeral data structure, add data so; Through the comparison of concrete magic lantern page data, can judge whether to do update processing.If do update processing, just with the Data Update in the internal storage data structure in existing ephemeral data structure, the no datat phenomenon can not appear, the phenomenon that so just can not occur dropping by the wayside.
(3) magic lantern thumbnail blank page problem.In being cut into view, can find that the magic lantern page or leaf in the magic lantern thumbnail is a blank page, main cause is that the magic lantern thumbnail adopts caching process mechanism here; Trigger through timer, and this timer call back function does not obtain triggering here, this way to solve the problem is; In sub-thread resolving; Osl_getGlobalTimer obtains system time through OpenOffice encapsulation function, in sub-thread is resolved the process of magic lantern page or leaf, sets interval, because platform there are differences and considers user experience; This time interval operated by rotary motion is at 10 ~ 100ms; If do not exceed Preset Time settings at interval, so just make current thread accomplish temporary suspension, make CPU time sheet wheel forward other threads to.The call back function of magic lantern thumbnail buffer update is able to carry out like this.
(4) magic lantern thumbnail scroll bar drags retardation problem.Here the problem that belongs to user experience, the method for solution mainly are in the response function that scroll bar drags, to increase variable to judge, are set to very at the function entrance variable; Outlet is made as vacation, and response function that scroll bar drags and document are resolved and in same thread, do not carried out, and in sub-thread, can obtain above-mentioned variable; If be true, explain that scroll bar is dragged and begin to carry out response function, make sub-thread parsing be able to slow down so; The embodiment here is: through circulation while function; Send update command to UI, postpone the continuation of sub-thread and carry out, make and resolve the data that obtain temporarily not in the write memory data model; Rolling to carry out for the flow process of magic lantern thumbnail provides the time, thus head it off.
(5) in the magic lantern playing process, animation effect has delay phenomenon.This way to solve the problem is, obtains current magic lantern through slideshow::IsRunning () and whether is in broadcast state, if be true, disposal route also is to make sub-thread resolve to slow down so.Thereby improve user experience.
(6) magic lantern preview problem.Here be meant that the user clicks PowerPoint guide, list the document entry of once opening here, click entry; The right side can be carried out first page magic lantern view and shown, original mode be must wait until document all parsings finish and just begin demonstration, promptly adopt original document load mode; Whole magic lantern document is resolved, and after having resolved the last page magic lantern, thereby reading of data is carried out the structure of view from the internal storage data model; Here in order to improve user experience; Judgement is only resolved first page of magic lantern under this mode, shortened period of reservation of number so greatly.
In sum, the present invention is directed to when loading the big document of PowerPoint, remarkable result is arranged, more than set forth the thinking and the practical implementation method of this invention; The present invention is applicable to all PowerPoint related pattern (PPT, PPTX, PPS; ODP, related patterns such as UOF), all within spirit of the present invention and principle; The modification of being done, replacement all should be included within protection scope of the present invention.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being made, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for the asynchronous loading of a PowerPoint document is to use impress assembly among the OpenOffice to load the thread management method of PowerPoint document, it is characterized in that may further comprise the steps:
One, at first carrying out document imports;
Two, carry out document and judge,, judge whether to be the corresponding document of PowerPoint through the contrast of PowerPoint filtrator, if otherwise walk former loading flow process;
If three is the PowerPoint document, opens up new document and resolve sub-thread;
Four, document is resolved sub-thread after the parse documents template finishes here, makes that through functions control main thread continues to be able to carry out, and PowerPoint module view framework is able to set up and shows, the main thread that the control view shows and the sub-thread of parse documents are constantly mutual;
Five, last document loaded.
2. the method for the asynchronous loading of PowerPoint document as claimed in claim 1 is characterized in that,
Document is resolved the following mode of the main employing of opening up of sub-thread: to the establishment multithreading function of different platform, carried out encapsulation again, here among type of the being defined in osl::Thread among the OpenOffice; Before loading the magic lantern document, above-mentioned type through inheriting, utilize such Virtual Function void run () sub-thread of dishing out; When creating sub-thread; For each thread is created global variable separately at TLS, the committed memory piece is in case the data exception that thread synchronization causes.
3. the method for the asynchronous loading of PowerPoint document as claimed in claim 2 is characterized in that, in document resolving, increases condition judgment, shortens the overall load time, has only and satisfies following condition: (a) the magic lantern page or leaf is resolved half the; (b) the magic lantern page or leaf is resolved and is finished; (c) magic lantern is in rolling condition in the magic lantern thumbnail, one of them the time, carry out magic lantern again and upgrade, the magic lantern page or leaf of promptly having resolved all manifests in thumbnail.
4. the method for the asynchronous loading of PowerPoint document as claimed in claim 2 is characterized in that, when the user begins to drag scroll bar, just carries out the renewal of magic lantern thumbnail, to shorten the load time of entire chapter document.
5. the method for the asynchronous loading of PowerPoint document as claimed in claim 3; It is characterized in that; When magic lantern is played to when page or leaf last, obtain the magic lantern number of pages of having resolved through internal storage data, the magic lantern number of pages when itself and magic lantern are begun to play compares; If the inconsistent explanation of magic lantern number of pages when magic lantern number of pages of having resolved and magic lantern begin to play has new parsing, just upgrade then.
6. the method for the asynchronous loading of PowerPoint document as claimed in claim 4; It is characterized in that wherein the magic lantern number of pages is specifically obtained and adopted following mode: in OpenOffice, can obtain through the member function GetSdPageCount () among type of the calling SdDrawDocument.
7. the method for the asynchronous loading of PowerPoint document as claimed in claim 1; It is characterized in that; In sub-thread resolving, osl_getGlobalTimer obtains system time through OpenOffice encapsulation function, in the process of sub-thread parsing magic lantern page or leaf, sets interval; If do not exceed Preset Time settings at interval; So just make current thread accomplish temporary suspension, make CPU time sheet wheel forward other threads to, make the call back function of magic lantern thumbnail buffer update be able to carry out like this.
8. the method for the asynchronous loading of PowerPoint document as claimed in claim 7 is characterized in that, resolves in the process of magic lantern page or leaf at sub-thread, and this time interval is arranged on 10-100ms.
9. like the method for the asynchronous loading of each described PowerPoint document of claim 1-8; It is characterized in that,, send update command to UI through circulation while function; Postponing the continuation of sub-thread carries out; The data that feasible parsing obtains are temporarily in the write memory data model, roll for the flow process of magic lantern thumbnail and carry out the time that provides, and drag retardation problem thereby solve magic lantern thumbnail scroll bar.
10. like the method for the asynchronous loading of each described PowerPoint document of claim 1-8; It is characterized in that; If do update processing; Just with the Data Update in the internal storage data structure in existing ephemeral data structure, the no datat phenomenon can not appear, the phenomenon that so can not occur dropping by the wayside.
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| CN105229691A (en) * | 2013-03-15 | 2016-01-06 | 脸谱公司 | Heavy operation is postponed when rolling |
| CN106775699A (en) * | 2016-12-09 | 2017-05-31 | 武汉斗鱼网络科技有限公司 | The method that UI is updated in asynchronous thread |
| CN107357542A (en) * | 2017-07-01 | 2017-11-17 | 深圳市灵星雨科技开发有限公司 | A kind of method of LED display played PPT PowerPoints |
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| CN105229691B (en) * | 2013-03-15 | 2020-02-18 | 脸谱公司 | Delaying heavy operations while scrolling |
| CN105229691A (en) * | 2013-03-15 | 2016-01-06 | 脸谱公司 | Heavy operation is postponed when rolling |
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| CN103152645A (en) * | 2013-03-22 | 2013-06-12 | 南京信通科技有限责任公司 | Continuous courseware playing method based on electronic schoolbag |
| CN104834544A (en) * | 2015-05-04 | 2015-08-12 | 广州杰赛科技股份有限公司 | Data loading method and device |
| CN104834544B (en) * | 2015-05-04 | 2018-03-13 | 广州杰赛科技股份有限公司 | Data load method and device |
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| CN107357542A (en) * | 2017-07-01 | 2017-11-17 | 深圳市灵星雨科技开发有限公司 | A kind of method of LED display played PPT PowerPoints |
| CN107357542B (en) * | 2017-07-01 | 2020-02-07 | 深圳市灵星雨科技开发有限公司 | Method for playing PPT (Power Point) demonstration manuscript by LED (light emitting diode) display screen playing system |
| CN109165372A (en) * | 2018-08-09 | 2019-01-08 | 深圳乐信软件技术有限公司 | A kind of webpage loading method, device, equipment and storage medium |
| CN109165372B (en) * | 2018-08-09 | 2020-10-13 | 深圳乐信软件技术有限公司 | Webpage loading method, device, equipment and storage medium |
| CN109933382A (en) * | 2019-03-11 | 2019-06-25 | 安徽志辉教育科技有限公司 | Online ppt previewing file tool based on owa service |
| CN109933382B (en) * | 2019-03-11 | 2022-08-12 | 安徽志辉教育科技有限公司 | Online ppt file preview tool based on owa service |
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