JP5068717B2 - Document display device, document display method, and document display program - Google Patents

Description

  The present invention relates to a document display device, a document display method, and a document display program for detecting a page position of a document image.

  The document editing work is generally performed by an application program that operates on a general-purpose OS (Operation System). When editing the document image, if the entire area of the document image is larger than the display window, the scroll bar ID is obtained via an API (Application Interface), and an instruction to move the scroll bar of the scroll bar ID is issued. The data is sent to the application, and the scroll bar ID is moved vertically or horizontally to edit the corresponding area. However, even a document editing application having a function of displaying a scroll bar by API may not have a page number display function. If a document image is created by a document editing application that does not have a page number display function, especially when the document image is large, the area to be displayed must be scrolled and searched each time, which takes time and effort. .

  In order to solve the above problems, various techniques have been proposed. For example, a technique for identifying a page by attaching an index to a scroll bar and selecting an index has been proposed (Patent Document 1). In addition, a technology for identifying a page by attaching a tag based on the scroll region length and selecting the tag has been proposed (Patent Document 2). Furthermore, a technology for recognizing a page by a function provided by an application has been developed.

Japanese Patent Laid-Open No. 2000-172401 JP 2001-34383 A

  However, in the techniques of Patent Document 1 and Patent Document 2, the page number of the displayed document is a program that creates a document image (hereinafter referred to as a creation program) and a program that reads the document image (hereinafter referred to as a read program). ) Are different, an incompatible situation may occur. If the creation program and the reading program do not have the compatibility of the page position display function, there is a problem that the page number of the document display area displayed at the time of reading is different from the page number at the time of creation. As for the technology for recognizing pages, it is necessary for the creating program to use an application program having a function of notifying the reading program of the page number of the document to be displayed. However, there are only a few programs having this function, and the method for notifying the page number differs depending on the program, so that adjustment according to each program is required. Further, the method for acquiring the image of the area for displaying the page number, the method for recognizing the number, and the method for knowing the page number are different from each other in the display area.

  The present invention has been made in view of the above, and provides a document display device, a document display method, and a document display program capable of improving convenience when displaying a document image by a simple operation. With the goal.

  In order to solve the above-described problems and achieve the object, the present invention provides a storage unit capable of storing page information indicating a page break position of a document image composed of a plurality of pages, and a transparent image on the document display area. An instruction to move a scroll instruction symbol for scrolling the document image is given to the display control unit to display and an application for displaying the document image on the document display area, so that the document is displayed on the transparent image. A scroll control unit that moves an image, a page break image detection unit that detects a page break image indicating a page break of the document image while moving the document image by an application based on an instruction from the scroll control unit, and a detection The page information of the document image is stored in the storage unit based on the position of the page-separated image. A page information specifying unit exists, characterized in that it comprises a.

  The present invention is also a method executed by the apparatus and a program for causing a computer to function as each unit of the apparatus.

  According to the present invention, while moving a document image to an application, a page break image that is an image displayed at a page break position is detected from the document image, and the position of the detected page break image is stored in the storage unit. Thus, there is an effect that the document page position can be easily detected by a simple operation regardless of the type of the creation program and the reading program.

  Exemplary embodiments of a document display device according to the present invention will be explained below in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a configuration of a document display apparatus 100 according to the present embodiment. As shown in the figure, the document display device 100 mainly includes an application 120, a page break detection unit 130, an HDD (Hard Disk Drive) 106, an input unit 110, and a display unit 111.

  The application 120 is an application that displays a document on the display unit 111 or creates a document while displaying the document on the display unit 111. For example, Word (R) of Microsoft (R) or Adobe (R) Acrobat Reader (R) and the like. This application reads document images. Here, the document image includes document data such as a document image in which characters and the like are represented as an image and an electronic document created by a document creation application. The document image is composed of a plurality of pages, and each page is separated by a page separation image. An area where the document image is displayed on the display unit 111 is referred to as a document display area.

  The page break detection unit 130 detects a page break of the document image displayed in the document display area by the application 120. As shown in FIG. 1, the page break detection unit 105, the scroll control unit 104, And a page information specifying unit 106.

  The display control unit 103 causes the application 120 to display a transparent window as a transparent image on the document image. Therefore, the document image is displayed through this transparent window. Further, the display control unit 103 displays a vertical line in a substantially central region of the transparent window as a detection line. The document image is scrolled on the detection line to detect a page break.

  The scroll control unit 104 acquires an ID of the scroll bar via an API provided by the operation system, and transmits an instruction to move the scroll bar with the scroll bar ID to the application 120. The application 120 that has received this instruction displays a scroll bar, and moves the document image on the document display area by moving the scroll bar. Here, the scroll bar includes a vertical scroll bar for scrolling the document image in the vertical direction and a horizontal scroll bar for scrolling in the horizontal direction.

  The page break image detection unit 105 detects a page break image while moving the document image on the document display area by the application 120 that has received an instruction from the scroll control unit 104. When the document image is displayed vertically on the display unit 111, a vertical scroll bar is used to detect the page break image.

  The page information specifying unit 106 specifies the coordinates of the position of the page break image detected by the page break image detection unit 105, and stores page information, which is information indicating the page break position of the document image, in the HDD 106.

  The HDD 107 stores a document page position information table 108 that is page information and a control table 109. FIG. 2 is a specific example of the document page position information table 108 and the control table 109. The document page position information table 108 holds the total number of pages, page number, page top coordinate, page bottom coordinate, page vertical length, and vertical scroll box Y coordinate. The control table 109 holds the document display area upper left corner coordinates, document display area width, document display area height, horizontal scroll bar ID, vertical scroll box Y coordinate, page break image, and page position detection line upper edge coordinates.

  Next, page position detection processing by the document display device of the present embodiment configured as described above will be described. 3, 4, 6, and 7 are flowcharts showing the procedure of page position detection processing. First, the application 120 reads a document from the HDD or the like and displays a document image in the document display area of the display unit 111. Then, the display control unit 103 displays the transparent window so as to overlap the document display area (step S304). Since the transparent window is transparent to the screen below the transparent window, even if the transparent window is displayed on the document image displayed in the document display area, the document image is also displayed on the screen.

  FIG. 8 is a diagram in which a document display area is displayed on the display unit 111. The page information specifying unit 106 acquires the screen coordinates (WX, WY), width (WW), and height (WH) of the upper left corner of the document display area, and stores them in the HDD 106 (step S305). Next, the scroll control unit 104 acquires the vertical scroll bar ID via the API, and transmits a display instruction for the vertical scroll bar 701 of the vertical scroll bar ID to the application 120 (step S306). As a result, the application 120 displays a vertical scroll bar on the right side of the document display area as shown in FIG. The page information specifying unit 106 stores the vertical scroll bar ID, which is the ID of the vertical scroll bar 701, in the control table 109 (step S308).

  Next, the scroll control unit 104 acquires the horizontal scroll bar ID via the API, and transmits a display instruction for the horizontal scroll bar 702 of the horizontal scroll bar ID to the application 120 (step S309). As a result, the application 120 displays the horizontal scroll bar 702 on the bottom side of the document display area as shown in FIG. Then, the page information specifying unit 106 stores the horizontal scroll bar ID, which is the ID of the horizontal scroll bar 702, in the control table 109 (step S311).

  Subsequently, the scroll control unit 104 instructs the application 120 to move the horizontal scroll box X coordinate of the horizontal scroll bar ID to 0 (step S312). Next, the scroll control unit 104 instructs the application 120 to move the vertical scroll box Y coordinate of the vertical scroll bar ID to 0. The image on the display screen after scrolling and the types of coordinates are as shown in FIG.

  The page break image detection unit 105 acquires the 1-pixel image 801 at the upper left corner of the document display area as a page break image (step S316). Then, the page information specifying unit 106 stores this page break image in the control table 109 (step S317).

  FIG. 9 shows a state in which the length DX is scrolled and displayed from the upper end 803 of the first page of the document image. Since the scroll movement by the application 120 is performed by moving the vertical scroll bar from the top to the bottom, each coordinate will be described in order from the top. Reference numeral 804 denotes screen upper end coordinates indicating the upper end of the currently displayed screen. Reference numeral 805 denotes a display upper end coordinate indicating the upper end of the next page that appears next to the page break area, and is a coordinate counted using the screen coordinates as the origin. Reference numeral 806 denotes screen lower end coordinates indicating the lower end of the currently displayed screen. P is a length from the screen upper end coordinate 804 to the display upper end coordinate 805. Reference numeral 802 denotes coordinates calculated with the top end 803 of the first page as the origin, which is “DX + P”.

  Here, the document image is fixedly displayed without moving in the areas on the right and left sides of the page position detection line only by moving on the page position detection line. In step S323, a document display area, a transparent window, and a document image are displayed on the display unit 111. FIG. 5 is a diagram illustrating the order of displayed images. Reference numeral 1701 denotes a state in which a transparent window is displayed in the foreground. The transparent window is displayed in the foreground, but is in such a display state because the transparent image is transmitted therethrough. Next, the acquisition unit 102 newly acquires the same image as the document image displayed in the document display area. Reference numeral 1702 denotes the same image as the document image. The display control unit 103 displays the newly acquired document image so as to overlap the document image displayed in the document display area except on the page position detection line. 1703 is a diagram in which the same image as the document image is displayed in areas A and B that are document images excluding the page position detection line. Finally, it is displayed in the state of 1704 on the entire screen.

  The page information specifying unit 106 calculates the coordinates of the page position detection line 901 that is a line for detecting a page break image (step S320), and stores the calculated coordinates in the control table 109 (step S321). Then, the page information specifying unit 106 sets the document coordinates, which are the coordinates on the document image at the upper end of the document display area, to 0 (step S322), and sets the page number to 1 (step S323). FIG. 10 shows the page position detection line 901 displayed on a transparent window. The upper end of the page position detection line is displayed over the upper end coordinates of the screen, and the lower end of the page position detection line is displayed over the lower end coordinates of the screen.

  As described above, when the document image obtained separately on the document image excluding the page position detection line is displayed in an overlapping manner, only the page position detection line is moved by the scroll operation. For this reason, it is possible to prevent uncomfortable feelings such as sickness caused by the movement of the entire document image by the scroll operation.

  Next, the process proceeds to page upper and lower edge detection processing (step S330). FIG. 11 is a diagram showing a display state of the document display area in the page upper and lower edge detection processing. Each display screen shows a state in which either or both of the page upper end coordinates (P) and the page lower end coordinates (E) are displayed from the vertical length WH of the document display area, or neither of them is displayed. It is a figure which shows the image when a page upper end is detected, and the image when a page lower end is displayed. Reference numerals 1001 and 1004 denote document display areas when the page upper end coordinates (P) are displayed. Reference numerals 1003 and 1004 denote document display areas when the page lower end coordinates (E) are displayed. 1002 is a diagram showing a document display area when neither the upper-end coordinates nor the lower-end coordinates are displayed.

  FIG. 12 is a flowchart illustrating a procedure of page upper and lower edge detection processing. In this process, the upper and lower ends of the page are detected in correspondence with the four display states shown in FIG. First, the acquisition unit 102 acquires a vertical high image from the screen upper end 902 to the screen lower end 903 shown in FIG. 10 (step S1101). Then, the scroll control unit 104 sets the Y coordinate of the page position detection line 901 to 0 (step S1102). The page break image detection unit 105 acquires a one-pixel image on the page position detection line 901 by the scroll operation performed by the scroll control unit 104 (step S1103). The page break image detection unit 105 determines whether or not the acquired one-pixel image is a page break image (step S1104). As a result of the determination, if the image is not a page break image (step S1104: No), the Y coordinate is incremented by 1 (step S1105). Subsequently, it is determined whether or not “Y coordinate <vertical height” is satisfied (step S1106). When “Y coordinate <vertical height” is satisfied (step S1106: Yes), all the images have not been detected yet, so the process returns to step S1102 to repeat the process. On the other hand, when “Y coordinate <vertical height” is not satisfied (step S1106: No), the page upper end coordinate is not detected from the currently displayed image, and therefore the page lower end coordinate is set to “−1”. The page upper end coordinates are set to “−1” (step S1108). This is the case of 1002 in FIG.

  The page information specifying unit 106 saves the page upper end coordinates and page lower end coordinates in the document page position information table 108 (step S1116). Returning to step S1104, when the page break image detection unit 105 detects a page break image (step S1104: Yes), the page lower end coordinate is set to “Y coordinate-1” (step S1109). This is the case of 1003 or 1004 in FIG. Since the page break image detected here is the first page break image detected, the coordinate one position above the detected page break image is the lower end of the page. When “Y coordinate-1” is set, the next one-pixel image is acquired (step S1110). Then, it is determined whether or not this 1-pixel image is a page break image (step S1111). If it is a page break image (step S1111: Yes), the Y coordinate is incremented by 1 (step S1112).

  Next, it is determined whether or not “Y coordinate <document area height” is satisfied (step S1113). If it is satisfied (step S1113: Yes), the process returns to step S1110 and the process is repeated. On the other hand, if “Y coordinate <document area height” is not satisfied (step S1113: No), it is determined that the top edge of the page has not been detected, and “−1” is set as the top edge coordinate of the page (step S1114). The page information specifying unit 106 stores the upper and lower page coordinates in the document page position information table 108 (step S1116).

  Returning to step S1111, when the page break image detection unit 105 detects a page break image (step S1111: No), the page upper end coordinate is set to the Y coordinate (step S1115). This is the case of 1001 or 1004 in FIG. Since the page break image detected here is the page break image detected next to the page break image detected in step S1104, it becomes the upper end coordinate. The page information specifying unit 106 stores the page upper end coordinates detected in step S1104 and the lower end coordinates detected in step S1111 in the document page position information table 108 (step S1116). The above-described series of processing is repeated until the processing for detecting the upper and lower ends of pages of all document images is completed. Then, the detected page upper end coordinates and page lower end coordinates are set as return values of this page upper end lower end detection process, and the process returns to the caller. If the upper and lower ends of the page are not detected, “−1” is set in steps S1109, S1114, S1104, and S1107, so “−1” is returned as a return value.

  FIG. 11 is a diagram illustrating coordinates detected by executing the page upper and lower edge detection processing on the entire document image. The document image shown in FIG. 12 includes three pages P1, P2, and P3. Y1 indicates the upper end of the page of P1, and Y2 indicates the upper end of the page of P2. H1 is the page vertical length of P1, and H2 is the page vertical length of P2. E1 indicates the lower end of the page of P1, and E2 indicates the lower end of the page of P2. The page lower end of P3 indicates the document area height of the entire document image.

  The process returns to step S331 of the page position detection process in FIG. The page break image detection unit 105 determines whether or not the page upper end coordinates are detected (step S331). As described in the page upper end lower end detection process shown in FIG. 12, when the page upper end coordinate or the page lower end coordinate is not detected, the page upper end coordinate or the page lower end coordinate is set to “−1”. Therefore, when the page top coordinate is detected ("-1" is set in the page top coordinate) (step S331: Yes), "L (scroll length) = page top coordinate" is set (step S333). When the page upper end coordinates are not detected (step S331: No), it is determined whether or not the page lower end coordinates are detected (step S332). If it is detected (step S332: Yes), “L = page lower end coordinate + 1” is set (step S334). On the other hand, if the page bottom coordinate is not detected (“−1” is set in the page bottom coordinate) (step S332: No), “L = document area height” is set (step S335). Reference numeral 1202 in FIG. 13 is a diagram showing a document display area when neither the upper end coordinates nor the lower end coordinates are detected.

  Next, the process proceeds to scroll control processing (step S331). FIG. 14 is a flowchart showing the procedure of the scroll control process. FIG. 15 is a diagram illustrating vertical lines used for the scroll control process. The scroll control unit 104 sets an input value as “L = scroll length” (step S1301). Next, the acquisition unit 102 acquires a vertical line via the API (step S1302). The display control unit 103 draws a vertical line from the upper end of the transparent window at a position L0 indicated by 1401 in FIG. 15 (step S1303). When the vertical line is drawn, the scroll control unit 104 instructs the application 120 to move the vertical scroll box Y coordinate downward by one line (step S1304). As a result, the application 120 moves the vertical scroll box Y coordinate downward by one line. At this time, the vertical line on the transparent window also moves to the position 1402 in FIG. The scroll control unit 104 detects the position (L1) of the vertical line after the movement, and calculates the movement amount (L1-L0) (step S1305).

  Then, the display control unit 103 erases the vertical line (step S1306). The scroll control unit 104 calculates the remaining scroll amount from “L = L−movement amount” (step S1307). The scroll control unit 104 determines whether or not the calculated scroll amount is “L> 0” (step S1308). If “L> 0” (step S1308: Yes), the process returns to step S1302, and the process is repeated. On the other hand, if “L> 0” is not satisfied (step S1308: No), it is determined whether “L <0” is satisfied (step S1309). If “L <0” is not satisfied (step S1309: NO), “actual length = scroll length−L” is set (step S1313). On the other hand, when “L <0” is satisfied (step S1309: Yes), the remaining scroll amount is calculated from “L = L + movement amount” (step S1311). Next, the scroll control unit 104 moves the vertical scroll box Y coordinate up one line (step S1312). Then, “actual length = scroll length−L” is set (step S1313). The above series of processing is repeated until the last page.

  In step S1309, if L <0 (step S1309: Yes), the scroll control unit 104 transmits an instruction to execute up scrolling to the application 120 (step S1310). Upon receiving this instruction, the application 120 scrolls up the document image. Then, the scroll control unit 104 calculates the remaining scroll amount from “L = L + movement amount” (step S1311). Then, the scroll control unit 104 instructs the application 120 to move the vertical scroll box Y coordinate on one line (step S1312). Thereby, the application 120 moves the vertical scroll box Y coordinate up one line. Then, “actual length = scroll length−L” is set (step S1313).

  The process returns to step S341 of the page position detection process in FIG. The page break image detection unit 105 determines whether or not the top edge coordinates of the page are detected (Sstep 341). When the page upper end coordinates are detected (step S341: Yes), “page upper end coordinates = screen coordinates + display upper end coordinates” is set (step S342). Next, the Y coordinate of the vertical scroll box position is stored in the document page position information table (step S343). Then, the page number is stored in the document page position information table (step S344), and the page number is incremented by 1 (step S345). Subsequently, it is determined whether or not “L (scroll length) = 0” is satisfied (step S346). If “L (scroll length) = 0” (step S346: Yes), the total number of pages is set to a number obtained by subtracting 1 from the page number (step S347). The page information specifying unit 106 calculates the page vertical length (next page upper end coordinate-page upper end coordinate) (step S348). The page position information is stored in the document page position information table (step S349). The display control unit 104 deletes the transparent window (step S350) and ends all the processes.

  As described above, according to the present embodiment, the document image is moved by the scroll bar acquired by the API, and the page break image that is an image displayed at the page break position is detected from the document image. By storing the detected position of the page break image in the storage unit, the document page position can be easily detected by a simple operation regardless of the type of the creation program and the reading program.

  The present embodiment includes a control device such as a CPU, a storage device such as a ROM (Read Only Memory) and a RAM, an external storage device such as an HDD and a CD drive device, a display device such as a display device, and a keyboard. And a hardware configuration using a normal computer.

  The page position detection program executed by the document display apparatus 100 according to the present embodiment is a file in an installable format or an executable format, and is a CD-ROM, flexible disk (FD), CD-R, DVD (Digital Versatile Disk). And the like recorded on a computer-readable storage medium.

  Further, the page position detection program executed by the document display device of the present embodiment may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. Further, the page position detection program executed by the document display device of the present embodiment may be provided or distributed via a network such as the Internet. Further, the program of the present embodiment may be configured to be provided by being incorporated in advance in a ROM or the like.

  The page position detection program executed by the document display apparatus according to the present embodiment includes the above-described units (document image reading unit 101, acquisition unit 102, display control unit 103, scroll control unit 104, page break image detection unit 105, page The information specifying unit 106) has a module configuration. As actual hardware, the CPU (processor) reads the page position detection program from the storage medium and executes the page position detection program, and the respective units are loaded onto the main storage device. The document image reading unit 101, the acquisition unit 102, the display control unit 103, the scroll control unit 104, the page break image detection unit 105, and the page information identification unit 106 are generated on the main storage device.

1 is a block diagram of a document display device 100 according to a first embodiment. It is a figure which shows a control table. It is a figure which shows a positional infomation table. It is a flowchart which shows the procedure of a page position detection process. It is a flowchart which shows the procedure of a page position detection process (continuation). It is a figure which shows the order of the image displayed. It is a flowchart which shows the procedure of a page position detection process (continuation). It is a flowchart which shows the procedure of a page position detection process (continuation). FIG. 6 is a diagram in which a document display area is displayed on a display unit 111. It is a figure which shows the image of the display screen after scroll movement, and the kind of coordinate. FIG. 6 is a diagram in which a page position detection line 901 is displayed in a document display area. It is a figure which shows the display state of the document display area in a page upper end lower end detection process. It is a flowchart which shows the procedure of a page upper end lower end detection process. It is a figure which shows each coordinate detected by performing a page upper end lower end detection process to the whole document image. It is a flowchart which shows the procedure of a scroll control process. It is a figure which shows the vertical line used for a scroll control process.

Explanation of symbols

100, 2000 Document display device 201 Control table 202 Position information table 701 Vertical scroll bar 702 Horizontal scroll bar 801 Page break image 802 Top page 803 Top page top 804, 902 Screen top 805 Display top 806, 903 Screen bottom 901 Page position detection line 1201-1204, 1701-1704 Display screen 1401, 1402 Vertical line

Claims (8)

A storage unit capable of storing page information indicating a page break position of a document image composed of a plurality of pages;
A display control unit for displaying a transparent image on the document display area;
A scroll control unit that moves the document image on the transparent image by instructing an application that displays the document image on the document display area to move a scroll instruction symbol for scrolling the document image. When,
A page break image detection unit that detects a page break image indicating a page break of the document image while moving the document image by an application based on an instruction from the scroll control unit;
A page information specifying unit that stores the page information of the document image in the storage unit based on the detected position of the page break image;
A document display device comprising: The display control unit displays a detection line image for detecting the position of the page break image on the transparent image,
The scroll control unit moves the document image on the detection line image by instructing the application to move the scroll instruction symbol,
The page break image detection unit detects the page break image by moving the scroll instruction symbol from the upper end of the detection line image by the scroll control unit,
The page information specifying unit includes, as the page information, the position of the page break image detected by the page break image detection unit, the page rear end position, and the coordinates of the document image first detected from the page rear end position. Memorize it as the front edge position of the page,
The document display device according to claim 1. The scroll control unit instructs the application to move a horizontal scroll instruction symbol that is the scroll instruction symbol in the horizontal direction and to move the vertical scroll instruction symbol that is the scroll instruction symbol in the vertical direction. ,
The page break image detection unit obtains, as the page break image, a pixel image at a left end position of the horizontal scroll instruction symbol in the document display area and an upper end position of the vertical scroll instruction symbol in the document display area;
The document display device according to claim 1, wherein: The display control unit displays the detection line image in a vertical direction at a substantially central position of the transmission image;
The document display device according to claim 2. The scroll control unit draws a predetermined vertical line on the transparent image, instructs the application to move the vertical scroll symbol for each unit scroll operation, and moves the vertical line according to the movement of the unit scroll operation. The scroll width, which is a unit scroll amount of the scroll instruction symbol, is obtained based on the amount of movement, and the document image is moved for each scroll width.
The page break image detection unit detects the page break image from a document image displayed on the transparent image after being moved by the scroll control unit;
The document display device according to claim 1, wherein: The scroll control unit moves the scroll instruction symbol, moves only the document image on the detection line image among the transparent images,
The page break image detection unit detects the page break image from a document image on the detection line image;
The document display device according to any one of claims 2 to 5. A page position detection method executed in a document display device,
The document display device includes a storage unit capable of storing page information indicating a page break position of a document image including a plurality of pages.
A display control step for displaying a transparent image on the document display area;
A scroll control step for moving the document image on the transparent image by instructing an application for displaying the document image on the document display area to move a scroll instruction symbol for scrolling the document image. When,
A page break image detection step of detecting a page break image indicating a page break of the document image while moving the document image by an application based on an instruction from the scroll control unit;
A page information specifying step for storing the page information of the document image in the storage unit based on the detected position of the page break image;
A document display method comprising: Computer
A storage unit capable of storing page information indicating a page break position of a document image composed of a plurality of pages;
A display control unit for displaying a transparent image on the document display area;
A scroll control unit that moves the document image on the transparent image by instructing an application that displays the document image on the document display area to move a scroll instruction symbol for scrolling the document image. When,
A page break image detection unit that detects a page break image indicating a page break of the document image while moving the document image by an application based on an instruction from the scroll control unit;
A page information specifying unit that stores the page information of the document image in the storage unit based on the detected position of the page break image;
A document display program to be executed.

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