CN102479176B - Fast-approaching typesetting method and device of electronic reader - Google Patents
Fast-approaching typesetting method and device of electronic reader Download PDFInfo
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- CN102479176B CN102479176B CN201010565850.8A CN201010565850A CN102479176B CN 102479176 B CN102479176 B CN 102479176B CN 201010565850 A CN201010565850 A CN 201010565850A CN 102479176 B CN102479176 B CN 102479176B
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Abstract
The invention discloses a fast-approaching typesetting method and device of an electronic reader, belonging to the field of typesetting display. The method comprises the following steps: carrying out paging according to set typesetting parameters so as to obtain the initial window length and the total page number in a document, and calculating a page initial point of each page according to the initial window length; obtaining an indicated position of the document according to the page initial point of a specified page number, carrying out paging on the document again from the indicated position of the document, accurately typesetting the page to which the specified page number belongs and each page in a preset page number of pages following the specified page number line by line, and revising the initial window length according to the accurate typesetting result; displaying the document on the electronic reader according to the page initial point after revision. According to the invention, accurate typesetting can be carried out line by line and typesetting can be carried out many times based on the preset number of accurate typesetting, so that the page initial point data can be revised, fast-approaching typesetting can be realized, running speed can be improved, the typesetting needs no restricted condition and the typesetting time cannot be increased with the increase of the document length.
Description
Technical field
The invention belongs to typesetting and show field, more specifically, relate to a kind of fast-approaching typesetting method of electronic reader.
Background technology
Along with the continuous popularization of electronic reader and universal, people are for the typesetting speed of electronic reader, stability performance is more and more fastidious, and the very huge txt formatted file that a lot of user generates voluntarily has proposed higher challenge for electronic reader typesetting.Electronic reader typesetting speed slowly, has greatly affected user's experience, has affected the happy sense while reading.Therefore, complete quickly the typesetting to file, quickly respond to user formfeed, revolve screen needs, become the urgent task that faces of development electronic reader.Certainly, improving hardware configuration can address this problem, and still the cost of this implementation method is with respect to the improvement of computing method, and the cost that seems is too high.
The composition method of prior art, the accurate typesetting that need to calculate line by line according to the pixel wide of the length of a line and each character.Such typesetting effect is best, but the also synchronously increase along with the increase of file size of needed typesetting time, file is larger, and the restrictive condition that typesetting requires is more, and the speed of typesetting is slower.Therefore, how for typesetting action, to simplify to improve travelling speed, become the epochmaking research topic of technical field for this reason.
Summary of the invention
Technical matters to be solved by this invention has been to provide a kind of fast-approaching typesetting method and device of electronic reader.The present invention constantly promotes the precision of greeking by accurate typesetting, reduced the time of accurate typesetting by greeking, rapidly a file is carried out showing after typesetting.
The fast-approaching typesetting method that the invention discloses a kind of electronic reader, performing step is as follows:
(1) according to the typesetting parameter of setting, carry out paging, obtain home window length and total page number in described document, with home window length computation, obtain the start of Page point of each page;
(2) according to the start of Page point of specified page number, obtain the indicating positions of described document, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting;
(3) according to revised start of Page point, on electronic reader, show.
What the invention also discloses a kind of electronic reader approaches composing device fast, comprises as lower module:
Paging module: carry out paging according to the typesetting parameter of setting, obtain home window length and total page number in described document, obtain the start of Page point of each page with home window length computation;
Correcting module: the indicating positions that obtains described document according to the start of Page point of specified page number, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting;
Display module: show on electronic reader according to revised start of Page point.
The fast-approaching typesetting method of electronic reader of the present invention and device, from described file, carry out line by line accurate typesetting, and carry out repeatedly typesetting with the accurate typesetting number of times of presetting, calculate page average data length, revised pages starting point data, has realized the typesetting approaching fast by this, has improved travelling speed, and typesetting does not have restrictive condition, the typesetting time does not increase along with file size.
Accompanying drawing explanation
Reader, after reading the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein:
Figure 1A is the realization flow figure of the fast-approaching typesetting method of electronic reader proposed by the invention.
Figure 1B is the start of Page point schematic diagram that greeking proposed by the invention generates.
Fig. 2 A is the start of line point schematic diagram that greeking proposed by the invention generates.
Fig. 2 B is the schematic diagram of the EOP point difference that generates of accurate typesetting proposed by the invention and greeking.
The start of line point schematic diagram of every a line when Fig. 2 C is accurate typesetting proposed by the invention.
Fig. 3 A is the statistics that the present invention utilizes accurate typesetting, revises the schematic diagram of the start of Page point of every page.
Fig. 3 B is last display effect of approaching fast typesetting proposed by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.Owing to the invention discloses a kind of fast-approaching typesetting method and device of electronic reader, the electronic reader correlation technique wherein used can understand for those of ordinary skills with structure, therefore with explanation hereinafter, no longer do complete description.Meanwhile, with the accompanying drawing hereinafter being contrasted, be intended to the implication of expression and feature related structure of the present invention, also do not need according to the complete drafting of physical size, formerly statement.
the first embodiment: the fast-approaching typesetting method of electronic reader
The present invention proposes the first embodiment, and the fast-approaching typesetting method for a kind of electronic reader, please refer to Figure 1A, comprises the following step:
Step 1: carry out paging according to the typesetting parameter of setting, obtain home window length and total page number in described document, obtain the start of Page point of each page with home window length computation.
The moving window length of electronic reader is not changeless, mainly by several typesetting parameters, is determined, in the time of typesetting parameter change, the window of display document will change.Typesetting parameter mainly comprises: font size, page size, document No. (File Encode) and document size (File Size).
Wherein, font size comprises set width and font height, has represented each character shared pixel wide and pixels tall when typesetting.Page size comprises pagewidth and page height, the breadth extreme that when pagewidth has determined typesetting, all characters are arranged.Maximum number of lines when page height has determined typesetting within one page.Code length has determined the real bytes number that each character is shared, and when coding kind is different, this character is also different with respect to the side-play amount of starting point hereof.Such as UTF8 coding, the code length major part of a Chinese character is 3 bytes.In addition, document size has determined the total page number of file.
First, by pagewidth, divided by set width, obtain characters per line:
Characters per line=pagewidth/set width
Then, by characters per line, be multiplied by the code length of present encoding, obtain the row data length (Data Length Per Line) of every row.
Row data length=characters per line * the code length of every row
Then, by page height, divided by font height, obtain every page of line number:
Every page of line number=page height/font height
In the present embodiment, line space is joined in font height as a typesetting parameter, also can directly specify the line number of every page and not calculate, these can not affect the effect of typesetting.Then, by every page of line number, be multiplied by the row data length of every row, obtain the home window length of every page, the average data length that home window length is each page.
The row data length of home window length=every page of line number * every row
Finally, by home window length, be multiplied by (page number-1), just can obtain the start of Page point of each page.
Start of Page point=(page number-1) * home window length of every page
The start of Page point of each page moves when typesetting parameter change, then in the memory module in electronic reader, stores the start of Page point of each page.In the present embodiment, current page size is 600 * 800, and pagewidth is 600 pixels, and page height is 800 pixels.Font size is 25.It is the area that each character summary can take 25 pixel * 25 pixel sizes.Supposing that in document No., each character is wide, is also 25 pixels so set width is 25 pixels, font height.
The document No. of current document is UTF8.In document, according to the coding rule of UTF8, go for each character.In the present embodiment, the Chinese character coded format of document is UTF8, and the code length of each character is 3 bytes, and the size of current document is 7.1K (7272 byte).First calculate characters per line and every page of line number.The factor of considering line space, it is 15 that line space is set.
Characters per line=pagewidth/set width=600/25=24
Every page of line number=page height/(font height+line space)=800/ (25+15)=20
Row data length=characters per line * code length=24 * the 3=72 of every row
Row data length=20 * the 72=1440 of home window length=every page of line number * every row
Home window length 1440 is initial moving window length, next just can calculate total page number (Total Page).To be document size add 1 divided by the quotient of home window length to total page number again, it is quotient+1 of total page number=(document size/home window length), because document size is 7272 bytes, home window length is 1440, the total page number=7272/1440+1=6.
At this moment, total page number just can calculate with the start of Page point of each interior page, that is the start of Page point of N page=(N-1) * home window length, stores in the memory module of electronic reader after the start of Page point of each of calculating page.As shown in Figure 1B, the start of Page point of the 1st page to the 6th page for calculating according to step 1.
Step 2: the indicating positions that obtains described document according to the start of Page point of specified page number, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting;
The indicating positions of described document calculates for starting from document section start, and specified page number is multiplied by the corresponding page data length of home window length after subtracting one.During first operation, without any the data recording about typesetting, the initial moving window length only obtaining in step 1 and the start of Page point of each page.Therefore, for the first time from the indicating positions of document, start the described document to re-start the step of paging as follows:
Step (2a): the specified page number of selecting according to user, obtain the start of Page point that specified page number is corresponding.
Step (2b): while carrying out accurate typesetting, start of Page point reading out data from file from the corresponding page of specified page number, first arrange a line, record the start of line point and row end point of every row, when the line number of arranging equals every page of line number, obtain the EOP point of one page, and recorded the EOP point of this page.The length of putting between EOP point from the start of Page of this page is this page data length.
Step (2c): to preset number of pages M repetition abovementioned steps (2a) and step (2b) M time, calculate the information obtaining by accurate typesetting for M time, and record the page data length of every page.Wherein, M is system default value, and according to the experience of practical operation gained, default number of pages M take 2 ~ 5 as good.
Step (2d): the page data length of each page of the default number of pages M page document that accurate typesetting is obtained is averaged, and obtains a page average data length, and the start of Page point of page average data length and each page is recorded in the memory module of electronic reader.
If be not first operation, that is later operation for the first time, when user jumps to target pages from current page, query page average data length, according to page average data length, from the EOP point of current page, start to calculate, obtain the start of Page point that target pages is corresponding.
Data length to each page of default number of pages after specified page number is averaged, and obtains a page average data length, and the start of Page point of page average data length and each page is recorded in the memory module of electronic reader.When user is during from current page page turning, the lower one page that shows current page, lower one page of last page in default number of pages M carries out accurate typesetting, start of Page point reading out data from file from this page, first arrange a line, record the start of line point and row end point of every row, when the line number of arranging equals every page of line number, obtain the EOP point of one page, and recorded the EOP point of this page.
The specific embodiment that continuity abovementioned steps 1 is used, further illustrates as follows:
If user requires to show the 2nd page, the default number of pages M that accurate typesetting is set is 2, and home window length is 1440 bytes.
First operation conditions below: first calculating start of Page point=(2-1) * 1440=1440 of the 2nd page, then arrange every a line, as shown in Figure 2 A, is the start of line point of every a line after the 2nd page of accurate typesetting.Wherein, the start of line of last column point adds that the row data length of this row is the row end point of this row, and the row end point of last column is the EOP point of the 2nd page after accurate typesetting.As shown in Fig. 2 B, 2C, the start of Page point P1 of the 2nd page is 1440, the EOP point P2 of the 2nd page generating by accurate typesetting is 2729, and the typesetting parameter of setting by step 1 to carry out the resulting EOP point P3 of paging be 2880, line by line accurately the typesetting parameter of typesetting and setting to carry out the EOP point that paging generates be discrepant.
Accurately typesetting obtains the start of Page point of the 3rd page line by line, and the EOP point of the 2nd page is that the accurate page data length of 2729, the 2 pages is 2729-1440=1289.Because the number of run M of the accurate typesetting of setting in the present embodiment is set to 2, need the lower one page (the 3rd page) to the 2nd page to carry out above-mentioned alignment processes, rank results is as shown in Figure 2 C.Line by line accurately typesetting to obtain the EOP point of the 3rd page be that the accurate page data length of 3993, the 3 pages is 3993-2657=1336; Page average data length=(accurate page data length+3rd of the 2nd page page accurate page data length)/2=(1289+ 1336)/2=1312.
At this moment, if user continues to turn over to the 5th page, home window length has been revised owing to last time calculating, revising home window length is page average data length, home window length changes to 1312 from 1440, the start of Page point of the 5th page calculates becomes 1312 * (5-1)=5248, makes the calculating of start of Page point more accurate.
In the present embodiment, during the 5th page of current page that user shows, default number of pages M is 2, the 6th page has been carried out accurate typesetting, when the current page that user shows turns over to the 6th page by the 5th page, the 7th page starts to carry out accurate typesetting from start of Page point, records the EOP point of the 7th page.In other embodiments, default number of pages M is 4, during the 5th page of current page that user shows, the 5th page to the 8th page has been carried out accurate typesetting, user shows while turning over to the 6th page by the 5th page, the EOP o'clock that calls the 8th page carries out accurate typesetting since the start of Page point of the 9th page, records the EOP point of the 9th page, makes the 6th page to the 9th page accurate typesetting complete.
According to the page after the accurate typesetting of page average data length records, the page carrying out after accurate typesetting to be added up, revised pages average data length is length of window.
Step a, records the continuous page after accurate typesetting.
Step b, if number of pages corresponding to continuous page after accurate typesetting is greater than default number of pages M,, according to the result of accurate typesetting, the page data length of each page that accurate typesetting is obtained is averaged, revising home window length is length of window.
In the present embodiment, during the 3rd page of current page that user shows, default number of pages M is 2, the 4th page has been carried out accurate typesetting, when the current page that user shows turns over to the 4th page by the 3rd page, the 5th page starts to carry out accurate typesetting from start of Page point, records the EOP point of the 5th page, accurately number of pages corresponding to the page after typesetting is 3, is greater than default number of pages 2.As shown in Figure 3A, according to the result of accurate typesetting, by mean value (6593-2729)/3=1288 revised pages average data length of the page data length of the 3rd, 4,5 pages, be length of window, length of window is 1288.
Because page average data length correction is length of window, the start of Page point correspondence of each page changes, if store the start of Page point of corresponding page in memory module, does not revise, otherwise adopts length of window to store the start of Page point of each page.During user's page turning, adopt length of window to carry out paging to document, newly obtain the corresponding page number of the page inquires about in memory module, if there is the start of Page point of the corresponding page number in memory module, the start of Page point of this page is not modified, otherwise to adopting length of window to carry out to document the start of Page point that paging obtains, store in memory module.
When user requires to show the page number of its appointment, each page showing must be unified.As open for the tenth time the 2nd page with open for the first time the 2nd page of content of being seen must be the same.So the corresponding start of Page point of specified page number can not be revised according to the size unification of length of window, and must maintain its consistance.In specific implementation process, because obtained the accurate typesetting data of the 2nd, 3 pages while moving for the first time, constant in order to maintain the start of Page point of the 2nd page, so the start of Page point of the 2nd page showing in Fig. 3 A remains 1440.Because the actual end point of the 3rd page is larger than new moving window, so revise the start of Page point of the 4th page, be 4017.
Step 3: show on electronic reader according to revised start of Page point.
According to the length of window of storing in memory module and start of Page point corresponding to page average data length, call document, document is shown on electronic reader.
If the line number that after revising, start of Page is put in the corresponding page is less than page line number corresponding to home window length, when when revising rear start of Page and put line number in the corresponding page and show the page corresponding to home window length, the page keep the page number constant in the situation that the split screen corresponding to home window length loads.In the present embodiment, when user checks the 1st page, because first page is the page corresponding to home window length, corresponding EOP point is 1440, and it can only be that 1288 pairs of document contents load by length of window that the rear start of Page of correction is put the corresponding page, by the data content of 0 ~ 1288 correspondence of document, the first screen at electronic reader shows, the page number that now document is corresponding is 1, user triggers after page turning order, owing to being that 1288 pairs of document contents load by length of window, the data of document correspondence 152 ~ 1440 are invoked on the second screen and continue to show by electronic reader, the corresponding page number is still 1.
User require the 2nd page pass through final display effect after concrete enforcement as shown in Figure 3 B.
the second embodiment: electronic reader approach fast composing device
The present invention further proposes the second embodiment, for a kind of electronic reader approach fast composing device, in order to realize the composition method described in the first embodiment, mainly include paging module, correcting module, display module.
Paging module: carry out paging according to the typesetting parameter of setting, obtain home window length and total page number in described document, obtain the start of Page point of each page with home window length computation;
Correcting module: the indicating positions that obtains described document according to the start of Page point of specified page number, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting;
Display module: show on electronic reader according to revised start of Page point.
Composition method and a composing device that iterates, progressively approaches the fastest typesetting speed proposed by the invention.Based on greeking and the accurately mutual utilization of typesetting, by accurate typesetting, constantly promote the precision of greeking.And promoted by the precision of greeking, reduce the time of accurate typesetting.By this, can significantly promote typesetting efficiency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the interest field of the present patent application; Simultaneously above description should understand and enforcement for those of ordinary skills, so other does not depart from the equivalence completing under disclosed spirit and change or modify, and all should be contained in the scope of claims.
Claims (9)
1. a fast-approaching typesetting method for electronic reader, is characterized in that, comprises the following step:
(1) according to the typesetting parameter of setting, carry out paging, obtain home window length and total page number in document, with home window length computation, obtain the start of Page point of each page;
(2) according to the start of Page point of specified page number, obtain the indicating positions of described document, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting; The modified result home window length of the accurate typesetting of described basis, comprises the steps;
Step a, records the continuous page after accurate typesetting;
Step b, if number of pages corresponding to continuous page after accurate typesetting is greater than default number of pages, the page data length of each page accurate typesetting being obtained is averaged, and revises home window length;
(3) according to revised start of Page point, on electronic reader, show.
2. the fast-approaching typesetting method of electronic reader according to claim 1, is characterized in that: described typesetting parameter comprises font size, page size, document No., document size and line space.
3. the fast-approaching typesetting method of electronic reader according to claim 2, it is characterized in that: described font size comprises set width and font height, described page size comprises pagewidth and page height, and described document No. comprises the byte number code length that coding method is shared with corresponding coded character.
4. the fast-approaching typesetting method of electronic reader according to claim 1, is characterized in that: described default number of pages is 2 to 5.
5. the fast-approaching typesetting method of electronic reader according to claim 1, is characterized in that: the indicating positions of described document calculates for starting from document section start, and specified page number is multiplied by the corresponding page data length of home window length after subtracting one.
6. the fast-approaching typesetting method of electronic reader according to claim 1, it is characterized in that: the data length to each page of default number of pages after specified page number is averaged, obtain a page average data length, and the start of Page point of page average data length and each page is recorded in the memory module of electronic reader.
7. the fast-approaching typesetting method of electronic reader according to claim 1, it is characterized in that: after described correction home window length, if store the start of Page point of the corresponding page number, the start of Page point of this page is not modified, otherwise adopt the start of Page point obtaining after accurate typesetting to store.
8. the fast-approaching typesetting method of electronic reader according to claim 1, it is characterized in that: while showing on electronic reader according to revised start of Page point, if revised start of Page is put corresponding page line number and is less than page line number corresponding to home window length, with revised start of Page, put corresponding page line number and show, in the situation that the page number remains unchanged, split screen loads.
9. an electronic reader approaches composing device fast, it is characterized in that, comprise following modules: paging module: according to the typesetting parameter of setting, carry out paging, obtain home window length and total page number in document, with home window length computation, obtain the start of Page point of each page;
Correcting module: the indicating positions that obtains described document according to the start of Page point of specified page number, from the indicating positions of document, start described document to re-start paging, line by line each page of default number of pages after the specified page number place page and specified page number is carried out to accurate typesetting, according to the modified result home window length of accurate typesetting; The modified result home window length of the accurate typesetting of described basis, comprises the steps;
Step a, records the continuous page after accurate typesetting;
Step b, if number of pages corresponding to continuous page after accurate typesetting is greater than default number of pages, the page data length of each page accurate typesetting being obtained is averaged, and revises home window length; Display module: show on electronic reader according to revised start of Page point.
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| CN103268185B (en) * | 2013-04-26 | 2016-11-23 | 珠海全志科技股份有限公司 | The text display method of E-book reader and device |
| CN104281560B (en) * | 2013-07-05 | 2020-06-30 | 腾讯科技（深圳）有限公司 | Display method, device and terminal of memory text information |
| CN108920066B (en) * | 2014-03-27 | 2021-05-18 | 青岛海信移动通信技术股份有限公司 | Touch screen sliding adjustment method and device and touch equipment |
| CN105224540A (en) * | 2014-05-29 | 2016-01-06 | 广州市动景计算机科技有限公司 | Page composing method and device |
| CN104537117A (en) * | 2015-01-23 | 2015-04-22 | 小米科技有限责任公司 | Article processing method and device |
| CN108664369B (en) * | 2017-03-30 | 2021-04-09 | 北大方正集团有限公司 | Typesetting software monitoring method and device |
| CN110852045A (en) * | 2018-08-01 | 2020-02-28 | 珠海金山办公软件有限公司 | Method and device for deleting document content, electronic equipment and storage medium |
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