JP2006011694A - Document display device and document display program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately display a document after moving to a desired position in the document.
When the position of document data of a portion desired to be displayed is specified in document data including a plurality of types of unit data such as a flow and a block (S3), the flow or block corresponding to the specified position is included. A layout based on the data of the included lines is created (S7). Then, the display position in the document data is calculated for the layout of the first line to be displayed (S9). If the calculated display position is the same as the specified position, display that line first, otherwise calculate the display position of the next line and decide which one to display first, The document data portion is displayed according to the layout (S11-S21).
[Selection] Figure 8

Description

  The present invention relates to a document display device and a document display program, and more particularly to a document display device and a document display program for presenting a position of a document to be displayed to a user and moving to a desired display position to update the display of the document. .

  In a device that displays media such as an electronic book, as shown in FIG. 15A, information about which part of the electronic book document is currently displayed is displayed on the screen. In this example, when the top of the document is 0% and the end of the document is 100%, the position of 25% is displayed. As a calculation method, for example, the following formula can be considered.

Current display position = ((number of characters from the beginning of the document) / (number of characters in the entire document)) × 100 (%)
Further, as shown in FIGS. 15B and 15C, the position to be moved in the document, that is, the position of the movement destination is designated and moved in proportion to the whole document. In this example, in FIG. 15B, when the position of 25% from the beginning of the entire document is currently displayed, the user wants to move to the position of 80%, and the% designation move dialog displays '80% When the destination position is specified by entering ', the display content is updated so that the document at the specified destination position is displayed as shown in FIG. The current display position is 80% as specified.

Other methods for calculating and moving the current display position at high speed are proposed in Patent Documents 1 and 2.
JP 2003-330699 A JP 2003-330700 A

  The prior art has the following problems.

  FIGS. 16A and 16B show a document whose total number of characters is 500 on a screen that can display nine characters per line. Currently, the top of the document is displayed. If an attempt is made to move to a position of 5%, it is only necessary that the 25th character “Y” is displayed on the top line of the screen because 500 × 5 ÷ 100 = 25 after the movement. Therefore, after the movement, a line starting from “S” is displayed at the top of the screen. However, since the current display position displayed on the screen is calculated based on the first character of the first line on the screen, it indicates 3.8%. When the current position is displayed with the decimal part rounded down, 3% is displayed. If one line is further scrolled here, it is updated and displayed as 5%. Therefore, even though it has been moved by specifying 5%, the display position after movement is different from the specified value, and the display position after scrolling one line from the display after movement is the specified value. Feel uncomfortable.

  In both Patent Documents 1 and 2, the size (ratio) of the scroll box displayed on the scroll bar is obtained. In Patent Document 1, the ratio between the currently displayed divided data size and the data size of the entire document is the size of the scroll box. In Patent Document 2, the layout size of the entire document is estimated from the ratio of the currently displayed divided data size and layout size to the data size of the entire document, and the ratio of the currently displayed layout size to the entire document is calculated. The size of the scroll box.

  However, according to the procedures of Patent Documents 1 and 2, since calculation cannot be performed unless the size of all the divided data in the document is known, processing takes time depending on the data structure of the document. Also, if% specified movement and% display are performed using this method, the specified value and the display value may be different from each other, as in the prior art.

  Further, in Patent Document 2, the entire layout size is estimated using the layout size of the currently displayed divided data, and the current position and the destination position are calculated. However, since the ratio of the layout size to the divided data size is not constant, the% position may become smaller even if scrolling in order due to the estimation error, resulting in an unnatural operation. An example is shown below.

  In Patent Document 2, the layout size of the entire document is estimated from the layout size of the displayed divided data, and% is calculated. In addition, the size of the scroll box (the ratio of the display range to the entire document) is obtained. When the same calculation method is applied to the% display, the size is as follows. Here, in accordance with an embodiment of the present invention described later, the divided data is referred to as “block” and the data size is referred to as “number of bytes”.

  Note that “number of layout dots” and “layout dot position” indicate the number or position of display dots in the vertical direction when the document is displayed in horizontal writing. Since the number of layout dots varies depending on the size of the image and the font size, it is not necessarily proportional to the number of bytes in the block.

  First, the% display value p is calculated by p = a × 100 / b. Here, a: the layout dot position (estimated value) in the entire document of the dot displayed at the top of the screen, and b: the number of layout dots (estimated value) in the entire document.

  Also, a = (c × f / e) + g is calculated, and b = c × d / e is calculated. However, c is the number of layout dots of the currently displayed block, and is the sum of the layout dots when displayed over two or more blocks. d: The number of bytes of the entire document. e: This is the number of bytes of the currently displayed block, and when it is displayed across two or more blocks, it is the sum of the numbers. f: The total number of bytes up to the front of the currently displayed block. g: The layout dot position in the block of the dot displayed at the top of the screen.

  As a simple example, the number of flows is 1, the number of blocks is 3, the number of bytes of each block is 800, 1200, 1000 in order from the top, and the number of dots when each block is laid out is 400, 500, Consider a case in which a document having 600 is displayed on a screen capable of displaying 200 dots on one screen. At this time, d = 800 + 1200 + 1000 = 3000 is constant. Other values are as follows.

  When only the first block is displayed, a = (400 × 0/800) + g = g, b = 400 × 3000/800 = 1500, c = 400, e = 800, and f = 0.

  When displaying the first and second blocks, a = (900 × 0/2000) + g = g, b = 900 × 3000/2000 = 1350, c = 400 + 500 = 900, e = 800 + 1200 = 2000, f = 0.

  When only the second block is displayed, a = (500 × 800/1200) + g = 333.3 + g, b = 500 × 3000/1200 = 1250, c = 500, e = 1200, f = 800. .

  When the second and third blocks are displayed, a = (1100 × 800/2200) + g = 400 + g, b = 1100 × 3000/2200 = 1500, c = 500 + 600 = 1100, e = 1200 + 1000 = 2200, f = 800.

  When only the third block is displayed, a = (600 × 2000/1000) + g = 1200 + g, b = 600 × 3000/1000 = 1800, c = 600, e = 1000, f = 800 + 1200 = 2000. .

  Therefore, the% display changes as follows according to the layout dot position displayed at the top of the screen.

  When the top of the screen is the first dot of the first block, only the first block is displayed, so 1 × 100/1500 = 0.1%. When the top of the screen is the 201st dot of the first block, the first block is displayed. Since only the block is displayed, 201 × 100/1500 = 13.4%. When the top of the screen is the 202nd dot of the first block, the first and second blocks are displayed, so 202 × 100/1350 = 15. When the top of the screen is the 400th dot of the first block, the first and second blocks are displayed, so 400 × 100/1350 = 29.6%, the top of the screen is the first dot of the second block Since only the second block is displayed at (333.3 + 1) × 100/1250 = 26.7%, when the top of the screen is the 301st dot of the second block, only the second block is displayed. (333.3 + 301) × 100/1250 = 50.7%, and when the top of the screen is the 302th dot of the second block, the second and third blocks are displayed, so (400 + 302) × 100/1500 = 46.8%, when the top of the screen is the 500th dot of the second block, since the second and third blocks are displayed (400 + 500) × 100/1500 = 60.0%, the top of the screen is the third block When the first dot is displayed, only the third block is displayed (1200 + 1) × 100/1800 = 66.7%. When the top of the screen is the 600th dot of the third block, only the third block is displayed. Therefore, (1200 + 600) × 100/1800 = 100%.

  As described above, when reading from the beginning, the value in% display may return in the middle, and there is a sense of incongruity.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a document display apparatus and program capable of accurately displaying a document after moving to a desired position in the document and promptly presenting the display position of the document part being displayed. It is to be.

A document display device according to an aspect of the present invention includes position specifying means for specifying a position of document data of a desired portion in document data including a plurality of predetermined unit data,
Position calculating means for calculating a display position of each predetermined unit data in the document data;
Of the calculated positions of the predetermined unit data calculated by the position calculating means, a portion of the document data including the predetermined unit data that is the calculated position corresponding to the specified position specified by the position specifying means is displayed. Display control means.

  Accordingly, a portion of the document data including the predetermined unit data corresponding to the calculated position corresponding to the specified position among the calculated positions of the calculated predetermined unit data is displayed.

  Therefore, it is possible to display the portion of the document data to be displayed at present so as to be the portion of the document data that does not deviate from the position designated as the display destination.

Preferably, the apparatus further comprises partial data acquisition means for acquiring data of a part corresponding to the designated position designated by the position designation means from the document data,
The position calculating unit calculates a display position in the document data of each of the predetermined unit data in the partial data acquired by the partial data acquiring unit.

Preferably, the specified position and the calculated position indicate a position from the beginning of the document data,
The calculated position corresponding to the designated position indicates the designated position or the position on the head side with respect to the designated position.

  Preferably, the predetermined unit data is row data.

  Preferably, the display control means displays the portion of the document data with the row data at the calculated position corresponding to the designated position designated by the position designation means as the head.

According to another aspect of the present invention, there is provided a document display device, wherein a position in the document data of a currently displayed portion of document data that includes a plurality of types of unit data having different types of layered sizes is displayed. Position calculating means for calculating;
Position display means for displaying the position calculated by the position calculation means,
The position calculating means includes
Of the unit data of each type, the position in the document data is calculated for the unit data corresponding to the currently displayed portion of the plurality of unit data of the type selected on the basis of the predetermined size. It is characterized by doing.

  Therefore, the position of the currently displayed portion in the document data hierarchized with a plurality of types of unit data having different sizes is the unit corresponding to the portion of the types of unit data selected on the basis of the predetermined size. The position of the data in the document data is calculated and displayed using this calculation result.

  Therefore, selection of the unit data of the type used to calculate the position follows a predetermined standard relating to the size used for hierarchization. Therefore, by applying a predetermined standard according to the size of the document data, the size of the document data can be increased. The position can be quickly calculated regardless of the size.

Preferably, the position calculating means includes
Judgment means for judging whether or not the number included in the document data among the unit data of each type exceeds a predetermined number in order from the upper hierarchy to the lower hierarchy;
Calculating a position in the document data for the unit data corresponding to the currently displayed portion of the plurality of unit data of the first type determined by the determining means to exceed the predetermined number. Features.

Preferably, the position calculating means includes
Among the unit data of each type, when the number included in the document data of the unit data of the upper hierarchy type does not exceed a predetermined number, among the plurality of unit data of the lower hierarchy type, A position in the document data is calculated for the unit data corresponding to the currently displayed portion.

Preferably, the position calculating means includes
For the currently displayed portion, the corresponding unit data is selected from the plurality of unit data of the lower hierarchy type, and for the other portions, the corresponding unit data is selected from the plurality of unit data of the higher hierarchy type. The corresponding unit data is selected.

According to still another aspect of the present invention, there is provided a document display program, wherein a computer is used to specify a position of document data at a desired portion in document data including a plurality of predetermined unit data using an input unit of the computer. ,
Position calculating means for calculating a display position in the document data for each of the predetermined unit data using the computing unit of the computer;
The predetermined unit data that is the calculated position corresponding to the specified position specified by the position specifying means among the calculated positions of the predetermined unit data calculated by the position calculating means using the display unit of the computer. It is a program for functioning as a display control means for displaying a part of the document data including.

According to still another aspect of the present invention, there is provided a document display program that uses a computer to calculate current data in document data that includes a plurality of one or more types of unit data of different sizes, using a computing unit of the computer. Position calculation means for calculating the position in the document data for the displayed part;
Function as position display means for displaying the position calculated by the position calculation means using the display unit of the computer,
The position calculating means includes
Calculating a position in the document data for the unit data corresponding to the currently displayed portion of the plurality of unit data of the type selected on the basis of each type of the unit data. It is a featured program.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Overview of document display device functions]
In the present embodiment, there is no page separation as in an HTML (Hyper Text Markup Language) document, and document data in a format that is freely laid out according to a screen size, a font to be used, or the like is targeted. This document data is called flow content in the present embodiment.

  There are two types of data formats for document data: a description format and an execution format for convenience of editing. The description format is a data format for creating data. Considering the ease of editing, it is described using a format that can be edited by a text editor such as XML (eXtensible Markup Language). The execution format is a format that considers execution in the document display device. In consideration of the ease of processing in the document display device, it is recorded in a unique binary format. The execution format is generated when the description format is converted by the dedicated tool.

[Composition of flow type content]
The flow-type content has a hierarchical structure in which each flow has a plurality of flows and each flow has a plurality of blocks.

[About the flow]
The flow-type content is usually composed of a plurality of flows. A flow refers to a group of data that is semantically organized, for example, a sentence in Chapter 1 and a sentence in Chapter 2 in a flow-type content. In general, one book has one or more flows. There are no particular criteria for dividing the flow, and it depends on the intention of the document data creator. For example, it may be divided into chapters, or may be divided into articles for document data such as newspapers. Further, it may be document data that is not divided and has only one flow.

[About Block]
Each flow is usually composed of a plurality of blocks. A block is a flow divided by an appropriate size in order to speed up the processing in the document display device. When dividing, auxiliary information is created so that a layout for reading and displaying data in block units can be created. Flow-type content has a different layout for display (described later) depending on the screen size and fonts used, so even when displaying from the middle of flow-type content, data is read from the beginning of the flow-type content and displayed for display. It is common to have to create. However, if a layout for reading and displaying data in block units can be created, processing can be performed at high speed even when the flow type content is displayed in the middle. Since the block division is performed at the time of conversion from the description format to the binary execution format, the document data creator is not aware of the existence of the block.

[About block components]
Each block has a character and an object designation tag for designating display of an image (moving image, still image) (there are other, but they are not related to the present invention and are omitted). The object designation tag designates attributes such as the file name and left / right alignment of the object to be displayed, as in HTML. It is possible to mix and describe characters and images in the same document data.

[Data structure of layout for display]
In order to display the characters and images in the block on the screen, it is necessary to configure the display image according to parameters such as the screen size and font size. Parameters can be fixed or changeable. In this embodiment, the data for the display image is called a layout. An example of the data structure of the layout will be described later.

[Specific calculation example of%]
In the document display apparatus according to the present embodiment, the desired display destination data in the electronic document data is designated, moved to the designated destination data, and displayed. Presenting the position of the current display data in the electronic document data is realized by the% display function. Specific location calculation examples for% designation or% display are as follows.

[% Specified move function]
(Control method switching threshold)
For example, when the number of flows in the flow-type content that is the electronic document data to be processed is 100 or more (but not limited to 100), the flow number control is performed. Otherwise, the number of blocks of the entire flow-type content is determined. For example, if the number is 100 or more, the number of blocks is controlled. If there is no block, that is, if both the number of flows and the number of blocks are less than 100, the number of bytes is controlled. Such control switching is automatically performed by the system.

(Calculation procedure for flow number control and block number control)
In flow-type content with a total of m (m ≧ 100) flows, the nth flow displayed when the display position is designated to move to the position of p% from the top (the first flow is the first) Is calculated as n = m × p / 100 (results are rounded down). For example, if the flow type content having 100 flows is designated to move to 50% position, the flow moves to the 50th flow.

  With regard to the control of the number of blocks, the position of the movement destination can be calculated by replacing “flow” in the above description with “block”.

(Calculation procedure for byte count control)
In the flow type content, when the display position is designated to move to the position of p% from the top, the destination position is the nth byte position from the top of the flow type content, and n = (m × p / 100 ) -1 (result is rounded down). However, when n <0, n = 0. Here, the two items on the right side are set to “−1” because the top byte position is set to 0 in the flow type content. The “byte position” indicates a position where a character or an object designation tag is written in byte units. If it is a byte position in the flow, it means an offset value from the beginning of the flow, and if it is a byte position from the beginning of the flow type content, it means an offset value from the beginning of the content. The byte position from the beginning of the flow type content is obtained by adding the byte position in the flow to the total value of the number of bytes of the flow on the content leading side from the flow. The beginning of the byte position is zero.

  The corresponding flow and byte position are obtained using the variable n thus calculated, and the display position is jumped so that the byte position is displayed at the top of the screen. For example, if the movement to the position of 10% is specified when the total number of bytes of the flow type content is 100 bytes, the byte position moves from the beginning of the flow type content to “9”.

(unique process)
When the position designated as the movement destination indicates 0% or 100%, special processing is performed. That is, if 0% is specified, the beginning of the flow type content is displayed, and if 100% is specified, the end of the flow type content is displayed.

  In the byte count control, the% display value that displays the position of the movement destination is checked, and if it is different from the% value specified as the movement destination, the% display value of one line destination is also checked. As a result, if the% display value of the one line destination matches the% value designated as the movement destination, the line moves to the one line destination.

[% Display function]
(Control method switching threshold)
As in the above-described% designation movement function, switching is performed in the order of flow, block, and byte while comparing with a predetermined threshold (for example, 100, but not limited thereto).

(Calculation procedure for flow number control and block number control)
When the flow type content has m (m> = 100) flows, when the top flow is the first and the nth flow from the top is displayed, the display position p% to be presented is p = n X100 / m can be calculated (results are rounded down). For example, when the 50th flow is displayed with flow-type content having 100 flows, the display position is calculated as 50% and presented.

(Calculation procedure for byte count control)
If the number of bytes of the entire flow type content (total number of bytes of all blocks) is m and the byte position of the entire flow type content of the character or object currently displayed at the top of the screen is n, the display position p% is p = ( n + 1) × 100 / m (result is rounded down). For example, assuming that the byte position from the top of the flow type content of the data currently displayed with the number of bytes of the flow type content being 100 is 9, the display position is calculated as 10% and presented.

(unique process)
When the display position p% of the calculation result indicates 0% or 100%, special processing is performed. That is, when the first byte position of the flow type content has already been displayed and the page cannot be returned any more, the display position is presented as 0%. If the byte position at the end of the flow-type content has already been displayed and the page cannot be turned any more, the display position is indicated as 100%.

  Even if the display position p% of the calculation result indicates 100%, if the page can still be turned, the display position p% is presented as 99%.

[Device configuration]
Next, the configuration of the document display device according to the present embodiment will be described. Although the document is written horizontally here, it can be similarly applied to the vertically written document.

  FIG. 1 shows the overall functional configuration of a document display apparatus according to an embodiment of the present invention. FIG. 2 shows a configuration for the% designation movement function according to the present embodiment, and FIG. 3 shows a configuration for the% display function. The functional configurations of FIGS. 2 and 3 each comprise the portion of FIG. The solid arrows in FIGS. 1 to 3 schematically show the flow of data or the flow of control.

  FIG. 4A shows a hardware configuration of a mobile phone equipped with a document display device according to an embodiment of the present invention. FIG. 4B shows a hardware configuration of a personal computer similarly equipped with a document display device. The hardware configuration is shown. FIG. 5 shows various buffers provided in a RAM (Random Access Memory) 13 in FIG. 4A and the main storage unit 21 in FIG. 4B. FIG. 6 is a diagram schematically showing the internal configuration of the flow type content 40 (hereinafter simply referred to as the content 40) according to the present embodiment, and FIG. 7 is a diagram showing the contents of the auxiliary information 41 of the content 40. is there.

  Referring to FIG. 1, the document display device includes a display position input unit 2, a corresponding display content position calculation unit 4, a content acquisition unit 5, a layout acquisition unit 6, and a content unit determination unit corresponding to a keyboard or the like externally operated by a user. 7, a display unit adjusting unit 8, a display position calculating unit 9, and a display unit 11. Referring to FIG. 2, a display position input unit 2, a corresponding display content position calculation unit 4, a layout acquisition unit 6, a display unit adjustment unit 8, a display position calculation unit 9, and a display unit 11 are provided for the% designation movement function. It is done. Referring to FIG. 3, a content acquisition unit 5, a content unit determination unit 7, a display position calculation unit 9, and a display unit 11 are provided for the% display function.

  Referring to FIG. 4A, a mobile phone equipped with a document display device has a central processing unit (CPU) 12, a RAM 13, and built-in and external flash memories 14 and 15 for centrally controlling and monitoring each part. A key unit 16 corresponding to the display position input unit 2, a display device 17 corresponding to the display unit 11, a communication device 18 for communicating with various external communication networks 28, and a bus 19 for connecting these units to each other. Is provided.

  The configuration in FIG. 4A is a mobile phone here, but may be an information processing terminal such as a PDA (Personal Digital Assistant) or a home appliance having a document display function.

  Referring to FIG. 4B, a personal computer equipped with a document display device corresponds to CPU 20, central storage unit 21, external storage unit 22, and display position input unit 2 for centrally controlling and monitoring each unit. Mouse 23 and keyboard 24, graphic device 25 used for display on display unit 11, monitor 26 corresponding to display unit 11, communication device 27 for communicating with various external networks 28, and these units. A bus 29 is provided for communication.

  Each of the CPUs 12 and 20 performs various arithmetic processes such as corresponding display content position calculation and display position calculation in the present invention. The RAM 13 and the main storage unit 21 store data obtained as a result of computations by the CPUs 12 and 20 and auxiliary information 41 described later. The built-in flash memory 14, the external flash memory 15, and the external storage unit 22 store an execution program, user setting data, and content 40. The user setting data refers to bookmark information of content, display setting information such as display font size and vertical writing / horizontal writing, and the like. The execution program and user setting data may be stored in the built-in flash memory 14 and the content 40 may be stored in the external flash memory 15.

  The key unit 16 and the keyboard 24 are composed of a numeric keypad, up / down / left / right cursor keys, a determination key, a power key, and the like. The display device 17 and the monitor 26 display the laid out characters and images, and the current display position calculated by the% display function is also displayed as a% value.

  The communication devices 18 and 27 are used when the electronic book content 40 is downloaded from the network 28. The downloaded content 40 is stored in the built-in flash memory 14 in the mobile phone. In the personal computer, it is stored in the external storage unit 22. In the following description, it is assumed that the content 40 has been converted into an execution format and encoded / encrypted in advance. However, the content 40 may be in a description format or may not be encoded / encrypted.

  Referring to FIG. 5, the RAM 13 and the main storage unit 21 are provided with various buffers that are accessed for processing for the% designation movement function and processing for the% display function. Specifically, a designated display position storage buffer 30, a calculated display position storage buffer 31, a layout storage buffer 32 for storing a layout 35 of FIG. 11 to be described later, and a content unit table 37 of FIG. 12 to be described later are stored. A content unit table storage buffer 33 and a current display position storage buffer 34 for storing current display position information that indicates which flow or block is currently being displayed in order from the top of the content 40 are provided.

  The current display position information in the current display position storage buffer 34 is set by the CPU 12 or 20 to indicate the head flow or head block of the content 40 when the content 40 is displayed for the first time. When the display of the content 40 is temporarily interrupted and then restarted, it corresponds to the position indicated by the current display position information in the current display position storage buffer 34 (the position displayed at the previous interruption). Is displayed. Also, when the user performs a page turning operation, a scroll operation, or the like of the data of the content 40 being displayed, the current display position information is updated to indicate the display position after the operation each time. Such an update procedure of the current display position information is a well-known procedure that is performed when the content 40 is displayed, and thus the details are omitted.

  Further, the current display position information in the current display position storage buffer 34 is updated so as to indicate the order of the flow or block corresponding to the movement destination even when the display position is moved by the% designation movement function.

  The following description will be given assuming the portable telephone of FIG. 4A, whose processing capability is more limited than that of a general-purpose personal computer. The same applies to the personal computer of FIG. 4B. The explanation can be applied.

  Referring to FIG. 1, the content acquisition unit 5 acquires auxiliary information 41 of the content 40. Specifically, auxiliary information 41 located at the beginning of the encoded content 40 in the built-in flash memory 14 is read out, stored in the RAM 13, and decoded there. Thereafter, the auxiliary information 41 after decryption in the RAM 13 is referred to, the content 40 in the built-in flash memory 14 is read and decrypted, and a predetermined process is executed.

  The content unit determination unit 7 refers to the auxiliary information 14 stored in the RAM 13 and performs switching such as the above-described flow number control and block number control, and determines whether the content unit to be processed is a flow or a block. The determination result is stored in the content unit table storage buffer 33 as the content unit table 37. The content unit table 37 stored in the content unit table storage buffer 33 is referred to by the display position calculation unit 9.

  When the display position input unit 2 operates the key unit 16 to input the specified display position information, the display position input unit 2 stores the input display position specification information in the specified display position storage buffer 30. Here, the information on the designated display position is input by a user operation, but the present invention is not limited to this. For example, the information may be input by handing over data from another task executed in the mobile phone.

  The designated display position information stored in the designated display position storage buffer 30 by the display position input unit 2 is referred to by the corresponding display content position calculation unit 4 and the display unit adjustment unit 8. When the display position calculation unit 9 stores the calculated display position information in the calculation display position storage buffer 31, the display position calculation unit 9 refers to the calculated display position information in which the display unit adjustment unit 8 and the display unit 11 are stored. The layout acquisition unit 6 stores the acquired layout 35 in the layout storage buffer 32. The layout 35 stored in the layout storage buffer 32 is referred to by the display unit adjustment unit 8 and the display position calculation unit 9.

(About content data structure)
The content 40 according to the present embodiment will be described. Referring to FIG. 6, the content 40 includes auxiliary information 41 and a plurality of flows 42 i (i = 1, 2, 3,..., M). Each flow 42i has the same configuration and includes a plurality of blocks 43j (j = 1, 2, 3,..., N). The block 43j includes a character code group 441 composed of a plurality of character codes and an object designation tag group 442 for designating object data such as an image developed in a document. When the content 40 of FIG. 6 is supplied to the document display device, the supplied content 40 is stored in the built-in flash memory 14 as an encoded / encrypted file. At the time of execution such as displaying a document of the content 40 on the display unit 11, the auxiliary information 41 of the content 40 is read from the built-in flash memory 14 and stored in the RAM 13 where it is decrypted. Therefore, at the time of execution, the decoded auxiliary information 41 is referred to.

(About the data structure of auxiliary information)
FIG. 7 shows the contents of the auxiliary information 41. The auxiliary information 41 is information for indicating the hierarchical structure of the flow, block, and byte of the content 40 and for managing the hierarchical structure. Specifically, the auxiliary information 41 includes data groups 410, 420 and 430. The data group 420 includes flow information 46 i for each flow 42 i included in the content 40. The data group 430 includes block information 49j for each block 43j included in the content 40.

  The data group 410 includes data 44 indicating the total number of flows included in the content 40, and pointer data 45i for designating each of the first to mth flow information 461 to 46m. Flow information 46i is provided corresponding to each flow 42i.

  The flow information 46i includes pointer data for designating corresponding block information 49j to each of the data 47 indicating the total number of blocks included in the corresponding flow 42i and the first to nth blocks 43j included in the flow 42i. 48j is included. The block information 49j includes data 61 of the total number of bytes of the character code included in the corresponding block 43j and pointer data 62 for indicating the main body data of the block 43j in the content 40 of the built-in flash memory 14. Here, in order to simplify the explanation, it is assumed that the content 40 consists only of a character code.

(About processing flowchart)
8 to 10 are flowcharts showing the processing procedures of the% designation movement function and the% display function according to the present embodiment. A program corresponding to each flowchart is created in advance and stored in the built-in flash memory 14. At the time of execution, the program is read from the CPU 12 and developed in the RAM 13. The CPU 12 can realize the% designation movement function and the% display function by each unit shown in FIGS. 1 to 3 by executing these programs in the RAM 13. In this way, each unit shown in FIGS. 1 to 3 is realized by these programs.

(About layout)
FIG. 11 shows an example of the layout 35 according to the present embodiment. The layout 35 is generated in units of blocks by the layout acquisition unit 5. The layout 35 has an array structure for storing characters and image objects for each display unit (row). Here, the array element includes row number data 351, row start position data 352, row end position data 353, and row element data 354 corresponding to each row of the display unit.

  The data 351 indicates the numbers assigned in order to the respective lines to be displayed, and is displayed on the screen in the order of the line numbers (ascending order). The line start position data 352 and the line end position data 353 indicate in which byte range the characters and images included in the corresponding line are described in the content 40.

  The row element data 354 indicates data displayed in the corresponding row. In the row element data 354, “character” indicates a character code, pointer information to character data, and the like, and “image” indicates tag data (address) for designating an object of the image. Character and image objects include their vertical and horizontal sizes and information (character code, pointers to image data, etc.) necessary to display each object.

(About content unit table)
FIG. 12 shows a content example of the content unit table 37. The content unit table 37 stores, as data, the number of elements (units) in the lower hierarchy held by the elements (units) in the upper hierarchy for the content 40 having a hierarchical structure of flow → block → byte. Thereby, display content position calculation can be processed at high speed. Here, since the content 40 has a three-layer structure of a plurality of flows, blocks, and character codes (byte data) individually specified by the flow number data 371, referring to the content unit table 37, This content 40 has m flows 42i that are the highest hierarchy, and each flow 42i has blocks 43j that are the second hierarchy for the number indicated by the data 372 of the number of blocks, and is indicated by the data 372. The number of bytes of the character code group 441 contained in each block 43j is indicated by data 381..., 38n. For example, the flow 42i with the flow number “1” holds one block 43j, which means that the number of bytes of the character code group 441 of this one block 43j is 800 bytes.

(% Move function)
A process for the% designation movement function according to the configuration of FIG. 2 will be described with reference to the flowchart of FIG. First, the auxiliary information 41 of the content 40 is stored in the RAM 13 by the content acquisition unit 5, and the data of the content 40 in the built-in flash memory 14 is decrypted and a layout 35 is created by the layout acquisition unit 6. Is assumed to be displayed on the display device 17 by the display unit 11.

  As described above, in the present embodiment, the% position information of the partial data being displayed is displayed together with the data display of the content 40 by the% display function, so that the user remembers the approximate% position of the partial data to be displayed again. I can keep it. Therefore, if the user wants to display again another desired portion of the content 40, for example, the portion that was browsed last time, the designated display position for operating the key unit 16 to designate the position of the desired portion as the destination. When inputting information, as this designated display position information, it is possible to indicate the position of the content 40 from the top as a% value, with the entire content 40 being 100%.

  When the user inputs the desired designated display position information from the key unit 16 in this way, the display position input unit 2 stores this in the designated display position storage buffer 30 (step S (hereinafter simply abbreviated as S) 3. ).

  Next, the corresponding display content position calculation unit 4 calculates a position corresponding to the designated display position information stored in the designated display position storage buffer 30 in the content 40 based on the auxiliary information 41 (S5). For example, if the content 40 is 1000 bytes and 50% is input as the designated display position information, it is the 500th byte. If the content 40 is composed of a plurality of flows 42i or a plurality of blocks 43j, which block of which flow 42i It is calculated whether 43j should be displayed.

  In this calculation, the total flow number data 44 of the auxiliary information 41 in the RAM 13, the total block number data 47 of each flow information 46i, the total byte number data 61 of each block information 49j, and the designated display position information are described above. The position can be calculated by applying to each of the calculation formulas. The calculation position is indicated by what number flow 42i or block 43j from the top of the content 40.

  Subsequently, the layout acquisition unit 6 creates a layout 35 including the data of the position calculated by the corresponding display content position calculation unit 4 and stores it in the layout storage buffer 32 (S7). The creation of the layout 35 is specifically as follows.

  If the calculated position indicates, for example, the i-th flow 42i, the first block information 49j indicated by the data 48j of the flow information 46i indicated by the pointer of the data 45i of the auxiliary information 41 in FIG. By searching, the corresponding data is read from the built-in flash memory 14 by the pointer indicated by the data 62 obtained as a result of the search, and the layout 35 is created by decoding. As a result of layout, if the layout for one screen or more has been created, the creation is completed. If not, the layout is sequentially created until the layout for one screen or more can be created for the subsequent blocks after the laid out block. I will do it.

  The display position calculation unit 9 searches the layout 35 stored in the layout storage buffer 32, and the position data of the first display unit (row) including the position data calculated by the corresponding display content position calculation unit 4 and The display position (%) from the top in the content 40 of the row is calculated using the size of the content 40 in bytes, and the calculated display position (%) data is stored in the calculated display position storage buffer 31 (S9). ). It is assumed that the size of the content 40 in bytes is obtained in advance.

  The display unit adjustment unit 8 compares the designated display position information stored in the designated display position storage buffer 30 with the calculated display position information stored in the calculated display position storage buffer 31, and both pieces of information indicate the same display position. Whether or not (S11). If the same display position is indicated (YES in S11), the display unit 11 displays data according to the layout 35 with the first display unit as the head (S13).

  On the other hand, if the display unit adjustment unit 8 determines that both display position information does not indicate the same display position (NO in S11), the layout acquisition unit 6 creates the layout 35 of the second display unit (row) and saves the layout. The data is stored in the buffer 32 (S15). When the first display unit and the second display unit belong to the same block, the layout of the second display unit is already created in S7, so S15 is unnecessary. Thereafter, the display position calculation unit 9 refers to the layout 35 in the layout storage buffer 32, calculates the display position of the second display unit, and stores the calculated display position information in the calculated display position storage buffer 31 (S17). When the display unit is a line, the next line after the first display unit (line) is set as the second display unit.

  The display unit adjustment unit 8 compares the designated display position information stored in the designated display position storage buffer 30 with the calculated display position information of the second display unit stored in the calculated display position storage buffer 31, and based on the comparison result, It is determined whether or not to display according to the layout 35 with the two display units at the top of the screen (S19). Specifically, if the display position of the second display unit is the same as the display position input by the user, the second display unit is displayed at the top of the screen (S21). If not, the first display unit is displayed at the top of the screen. Are displayed (S13). In view of the fact that the document of the content 40 is generally read from the beginning, when the display positions are different, the preceding line (first display unit) is not the first display unit but the second display unit. It can be said that it is a natural display mode.

(Modified example of% specified move function)
Next, a modified example of the% designation movement function will be described with reference to the processing procedure of FIG.

  First, in steps S25 and S27, processing similar to that in steps S3 and S5 in FIG. 8 is performed.

  Next, the layout acquisition unit 6 creates a layout 35 around the corresponding position based on the calculated display position in the same manner as described above, and stores it in the layout storage buffer 32 (S29).

  The display position calculation unit 9 refers to the layout 35 stored in the layout storage buffer 32 and calculates the display position (%) for each display unit (row) indicated by the data 351 in the layout 35 in the same manner as described above. The calculated display position storage buffer 31 stores the calculated display position information (S31).

  The display unit adjustment unit 8 compares the specified display position information stored in the specified display position storage buffer 30 with the calculated display position information for each display unit (row) stored in the calculated display position storage buffer 31. Based on the result, the optimum display unit (row) to be displayed at the top of the screen is selected and determined (S33).

  Specifically, when the display unit is a row, the calculated display position of each row is compared with the designated display position input by the user, and the row showing the same value is selected. If there are a plurality of rows showing the same value, a row close to the top of the content 40 is selected. On the other hand, if there is no row showing the same value, the row indicating the calculated display position that is smaller than the value of the designated display position input by the user and closest to the value of the designated display position is selected.

  The display unit 11 displays the data on the display device 17 according to the layout 35 so that the selected display unit (row) is positioned at the head of the screen as the determined optimum display unit (S35).

  In this way, in the procedure of FIG. 8 or FIG. 9, the calculated display position is compared with the designated display position, the optimum display unit (row) is specified, and the optimum display unit is the present implementation. In this form, adjustment is made so that the first display line is displayed on the screen, so that there is no deviation between the current display position and the display position of the designated movement destination.

(About% display function)
With reference to the flowchart of FIG. 10, the processing procedure of the% display function according to the configuration of FIG. 3 according to the present embodiment will be described.

  First, the content acquisition unit 5 acquires the content 40 (S41). Specifically, the auxiliary information 41 of the content 40 in the built-in flash memory 14 is read out and expanded in the RAM 13 in accordance with the procedure described above. Here, the auxiliary information 41 is decrypted data.

  Next, the content unit determination unit 7 determines a content unit for which a display position is to be calculated (S43, S49). Specifically, referring to the auxiliary information 41 in the RAM 13, it is determined with reference to the flow number data 371 whether or not the content 42 has a predetermined number (for example, 100) of flows 42 i in the first content unit (chapter). (S43). If the determination result shows that the total number of the first content units indicated by the flow number data 371 is equal to or greater than the predetermined number (YES in S43), the display position calculation unit 9 determines the total value and the current display position of the current display position storage buffer 34. The display position (%) is calculated by applying the order value of the currently displayed flow indicated by the information to the above-described flow number control formula, and the calculated display position (%) information is calculated display position storage buffer 31 (S45).

  The display unit 11 displays the information on the display position (%) stored in the calculated display position storage buffer 31 together with the data of the content 40 on the display device 17 (S47).

  On the other hand, if the first content unit (flow 42i) is less than the predetermined number (NO in S43), it is determined whether the second content unit (section) block 43j is greater than or equal to the predetermined number (for example, 100) in the content 40. (S49). Specifically, the content unit table 37 is created with reference to the auxiliary information 41 in the RAM 13 and stored in the content unit table storage buffer 33. The determination is made based on whether or not the total number of blocks of the entire content calculated from the content unit table 37 is a predetermined number or more.

  As a result of the determination, if the number of blocks in the second content unit is greater than or equal to the predetermined number (YES in S49), the display position calculation unit 9 displays the order from the top of the content 40 of the currently displayed block 43j as the current display position storage buffer. The display position (%) is calculated from the current display position information of 34, and the display position (%) is calculated by the calculation formula of the block number control described above using the value of the specified order and the above-mentioned total number of blocks. The data is stored in the position saving buffer 31 (S51). Thereafter, the process proceeds to step S47 described above.

  On the other hand, if the number of blocks of the second content unit is also less than the predetermined number (NO in S49), the display position calculation unit 9 calculates the display position (%) using the number of the third content unit (bytes), Information on the calculated display position (%) is stored in the calculated display position storage buffer 31. Thereafter, the process proceeds to step S47 described above.

  Specifically, the total number of bytes of the content calculated from the content unit table 37 and the data at the byte position indicated by the line start position data 352 of the first line of the layout 35 currently being displayed are the number of bytes described above. The display position (%) is calculated by applying to the calculation formula of control (S53), and this is stored in the calculated display position storage buffer 31 (S51). Thereafter, the process proceeds to step S47 described above.

  The% display function is executed in accordance with the procedure shown in FIG. 10, and the% display position is calculated in units of flows, blocks, or bytes according to the data size of the content 40 (total number of flows, total number of blocks, total number of bytes). Since the switching is performed selectively so as to be performed in units, the current display position (%) can be quickly calculated and presented even when the size of the content 40 increases.

  The% display function can be realized without creating the content unit table 37. In that case, when calculating the total number of blocks of the entire content in S49, the total number of all blocks indicated by the data 47 of each flow information 46i of the auxiliary information 41 may be used. Further, when the total number of bytes of the entire content is calculated in S53, if the total number of bytes indicated by the data 61 of the block information 49j of each block 43j of the content 40 in the auxiliary information 41 is integrated for all the blocks of the entire content. Good.

(Display example)
FIGS. 13A to 13D show a display example when the display device 17 displays the% display by the% display function and the% specified movement by the% specified movement function.

  As shown in FIG. 13A, the% value by the% display function indicating which part of the document of the content 40 is currently displayed is displayed in the window 51 at the top of the screen. In this example, when the top of the document is 0% and the end of the document is 100%, the position of 25% is displayed. Further, as shown in FIG. 13B, the position to be moved in the document is designated as a ratio with respect to the whole document and moved by the% designation moving function. In this example, a frame 25 indicates that switching to the mode of the% designated movement function is designated when the position of 25% of the entire document is currently displayed. In this mode, the data 53 is designated to be moved to the “80%” position by operating the key unit 16.

  Here, FIG. 13C shows a movement result in the prior art. Although 80% is specified on the% designation movement screen in FIG. 13B, 79% is displayed when the window 51 in FIG. 13C is viewed after the movement. In contrast, FIG. 13D shows the movement result of the% designation movement function according to the present embodiment. The value designated on the% designation movement screen in FIG. 13B and the value displayed in the window 51 of the screen after the movement in FIG. 13D match.

(Modification)
Modification examples according to the present embodiment will be described below.

  In this embodiment, when the display destination is moved by the% designation movement function, the% position of the movement destination obtained by calculation is calculated, and if the value is different from the value at the time of specifying%, one line destination (the end direction of the content) )% Position is calculated, and if the value matches the specified% position, it moves to the next line, but if it is not “match” but “move to the smaller% compared” You may make it determine.

  In the present embodiment, the calculation method of% designation movement and% display is changed according to the size of the content 40, but the whole is calculated by the number of flows, and among them, the flow 42i currently displayed is the number of blocks. Further, a method may be used in which the calculation is performed in detail, and the block 43j currently displayed is calculated in terms of the number of bytes to be calculated in more detail.

  Further, the calculation method of the% designation movement and% display may be changed according to the performance of the operating hardware such as the speed of the CPU 12 and the capacity of the memory (RAM 13). In other words, a low-spec embedded device calculates the number of flows to perform rough movement and display, and a high-spec personal computer calculates the total number of bytes of content 40 to perform detailed movement and display. Good.

  The calculation of the% position can be accelerated by storing the number of blocks in each flow 42i and the number of bytes in each block 43j in the content 40 in advance. Further, when opening the content 40 or when the CPU 12 is in an idle state, these pieces of information may be calculated and stored in the memory (RAM 13).

  Also, depending on the content 40, a dictionary search screen and a flow 42i consisting of manga images are mixed in addition to a flow 42i consisting of normal character strings and images. In this case, since the number of characters and the number of bytes cannot be simply calculated, the number of blocks of the flow 42i may be calculated as 1, and the number of bytes of the block may be calculated as the file size of the flow 42i.

  In addition, if the display position of the content 40 is expressed as a percentage, it is a percentage, so it is either 0 to 99% or 1 to 100%, and does not become 100% although it is the last of the content 40. Or, it becomes an unnatural state in which the content 40 is not at 0% even though it is at the top. For this reason, special processing is performed such that 0% is unconditionally displayed when the top of the content 40 is displayed, or 100% unconditionally when the end of the content 40 is displayed.

  In the above-described embodiment, the% position for display is calculated using the line start position 352 of the line displayed at the top of the screen. However, as shown in FIG. In a layout 35 that is displayed over a plurality of lines, the beginning of a certain line of the image has the same% value. For this reason, in the second and subsequent lines of the image, the position of the next character in the image is the target of% display calculation.

  Further, since the content 40 having a large size covers a wide range of 1%, the designation of the% designation movement may be finely made according to the content size. For example, the content 40 having a large content size can be specified as% up to the second decimal place, but the content 40 having a small content size may be specified only in integers or in increments of 2%.

  In addition, the document display device generally has a bookmark function that allows a user to register a location that the user wants to open immediately. However, when a scroll operation is performed via the key unit 16 while the content 40 is being displayed, the bookmark position is the result of scrolling. At the timing when data near is displayed, the display color of the% position displayed at that time may be changed to notify that the data at the bookmark position will be reached soon.

  In the above-described embodiment, the layout 35 is determined if parameters such as the display screen size, character size, line spacing, and character spacing are determined. However, when% movement is performed, the position of the movement destination is always the beginning of the line. Alternatively, the layout 35 may be obtained again by the layout acquisition unit 6.

  Here, the display position designation for the% designation movement function is a numerical value input by operating the key unit 16, but is not limited to this. For example, the size of the content 40 shown in FIG. 14 may be assigned to the length of the scroll bar 50, and the position may be specified using a hatched slider in the scroll bar 50. This slider relatively indicates the position of the display position% such as where the part of the document currently displayed in the window is in the entire document at the position on the scroll bar 50, and the length of the information. You may make it show the ratio with respect to the whole content 40 of the size of the data currently displayed. The user can change the display position of the document by dragging the slider by operating the cursor movement key of the key unit 16 or by dragging the slider with a mouse or the like.

  Alternatively, dial key operation, designation by a touch sensor, or button operation input may be used.

(Regarding program recording media)
Here, the medium of the program according to the above-described flowchart of the present embodiment is a recording medium configured to be separable from the computer main body of FIG. 4B, a tape system such as a magnetic tape or a cassette tape not shown, flexible Discs of optical discs such as magnetic discs such as discs and hard discs, CD-ROM (Compact Disc Read Only Memory) 48 / MO (Magnetic Optical Disc) / MD (Mini Disc) / DVD (Digital Versatile Disc), IC cards (memory) (Including card) / card system such as optical card, or medium that carries a fixed program including semiconductor memory such as mask ROM, EPROM (Erasable and Programmable ROM), EEPROM (Electrically EPROM), flash ROM, etc. Also good.

  Further, in the present embodiment, a configuration for communicating with various networks 28 including the Internet is adopted, so that a medium in which a program is downloaded from these networks 28 and is carried in a fluid manner may be used. When the program is downloaded from the network 28 as described above, the download program is stored in advance in the portable telephone body of FIG. 4A or the computer body of FIG. It may be installed in advance from the recording medium.

  Note that the content stored in the recording medium is not limited to a program, and may be data.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is an overall functional configuration diagram of a document display device according to an embodiment of the present invention. FIG. It is a block diagram of the% designation | designated movement function which concerns on embodiment of this invention. It is a block diagram of the% display function which concerns on embodiment of this invention. (A) And (B) is a hardware block diagram concerning embodiment of this invention. It is a figure which shows the various buffers which concern on embodiment of this invention. It is a figure which shows the structural example of the content which concerns on embodiment of this invention. It is a figure which shows the example of the content of the auxiliary information which concerns on embodiment of this invention. It is a flowchart of the% designation | designated movement function which concerns on embodiment of this invention. It is a flowchart of the% designation | designated movement function which concerns on embodiment of this invention. It is a flowchart of the% display function which concerns on embodiment of this invention. It is a figure which shows an example of the layout which concerns on embodiment of this invention. It is a figure which shows an example of the content unit table which concerns on embodiment of this invention. (A)-(D) are figures which show the example of a display which concerns on embodiment of this invention. It is a figure which shows the example of a display which concerns on embodiment of this invention. (A)-(C) are figures explaining a prior art. (A) And (B) is a figure explaining a prior art.

Explanation of symbols

  2 Display position input unit, 4 Corresponding display content position calculation unit, 5 Content acquisition unit, 6 Layout acquisition unit, 7 Content unit determination unit, 8 Display unit adjustment unit, 9 Display position calculation unit, 11 Display unit, 35 Layout, 37 Content unit table, 40 contents, 41 auxiliary information, 42i flow, 43j blocks.

Claims (10)

Position specifying means for specifying the position of document data of a desired part in document data including a plurality of predetermined unit data;
Position calculating means for calculating a display position of each predetermined unit data in the document data;
Of the calculated positions of the predetermined unit data calculated by the position calculating means, a portion of the document data including the predetermined unit data that is the calculated position corresponding to the specified position specified by the position specifying means is displayed. A document display device comprising display control means. A partial data acquisition unit that acquires data of a part corresponding to the designated position designated by the position designation unit from the document data,
2. The document display device according to claim 1, wherein the position calculation unit calculates a display position in the document data of each of the predetermined unit data in the partial data acquired by the partial data acquisition unit. The designated position and the calculated position indicate a position from the beginning of the document data,
The document display apparatus according to claim 1, wherein the calculated position corresponding to the designated position indicates the designated position or the position on the head side with respect to the designated position.   The document display apparatus according to claim 1, wherein the predetermined unit data is row data.   5. The display control unit according to claim 4, wherein the display control unit displays the portion of the document data with the line data at the calculated position corresponding to the designated position designated by the position designation unit as a head. Document display device. Position calculating means for calculating a position in the document data for a currently displayed portion of the document data including a plurality of types of unit data of different types of layered sizes.
Position display means for displaying the position calculated by the position calculation means,
The position calculating means includes
Of the unit data of each type, the position in the document data is calculated for the unit data corresponding to the currently displayed portion of the plurality of unit data of the type selected on the basis of the predetermined size. A document display device characterized in that: The position calculating means includes
Judgment means for judging whether or not the number included in the document data among the unit data of each type exceeds a predetermined number in order from the upper hierarchy to the lower hierarchy;
Calculating a position in the document data for the unit data corresponding to the currently displayed portion of the plurality of unit data of the first type determined by the determining means to exceed the predetermined number. The document display device according to claim 6, wherein the document display device is characterized. The position calculating means includes
Among the unit data of each type, when the number included in the document data of the unit data of the upper hierarchy type does not exceed a predetermined number, among the plurality of unit data of the lower hierarchy type, The document display device according to claim 6, wherein a position in the document data is calculated for the unit data corresponding to the currently displayed part. A position designation means for designating a position of document data of a desired portion in document data including a plurality of predetermined unit data using an input unit of the computer;
Position calculating means for calculating a display position in the document data for each of the predetermined unit data using the computing unit of the computer;
The predetermined unit data that is the calculated position corresponding to the specified position specified by the position specifying means among the calculated positions of the predetermined unit data calculated by the position calculating means using the display unit of the computer. A document display program for functioning as a display control means for displaying a part of the document data including. The computer uses the computing unit of the computer to determine the position in the document data for the currently displayed portion of the document data including a plurality of types of unit data of one or more types with different sizes. Position calculating means for calculating;
Function as position display means for displaying the position calculated by the position calculation means using the display unit of the computer,
The position calculating means includes
Calculating a position in the document data for the unit data corresponding to the currently displayed portion of the plurality of unit data of the type selected on the basis of each type of the unit data. Characteristic document display program.

Images