JP2015069473A - Display control device, display control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display control device, a display control method, and a program that can appropriately perform display control of a file used in an information processing terminal.SOLUTION: A display control device 100 comprises: a first display 112; a second display 113; storage means 110 that holds a file 111 including data and an attribute which indicates a position condition for permitting displaying of the data to the second display 113; position information acquisition means 104 that acquires a current position; and drawing control means 107 that limits the displaying of the data to the second display 113 on the basis of a comparison result of the current position and the position condition included in the attribute.

Description

  The present invention relates to a display control device, a display control method, and a program, for example, a technique for appropriately performing display control of a file used in an information processing terminal.

  It has become common to display the contents of files such as presentations using a portable information processing terminal such as a notebook computer. On the other hand, a large amount of information including secret information is often stored in the information processing terminal, and there is a risk that the secret information may be leaked due to an erroneous operation by the user.

  Conventionally, various file protection techniques have been used to prevent leakage of confidential information from information processing terminals. For example, Patent Document 1 automatically encrypts a file by using authentication information of a file acquisition destination network, thereby preventing the contents from being read when the file reaches a third party. The configuration is described.

  Patent Document 2 discloses an information processing terminal having a dependent file or an information processing terminal connected to a network that can access the dependent file by performing encryption and decryption with reference to the logical position of the “dependent file”. A configuration is described so that the file cannot be read by other than the above.

  Furthermore, Patent Document 3 has a configuration in which access control of websites and files is performed based on GPS position information of a mobile terminal, and for example, a file containing confidential information cannot be accessed at the location of a customer or a business partner. Have been described.

  Patent Document 4 describes a configuration for determining whether or not a file can be accessed by acquiring the access authority that each of the plurality of persons has when accessing the file when there are a plurality of persons.

  Patent Documents 5 and 6 disclose a method for performing information output control to an external display device such as a projector in accordance with a confidential attribute of a file and a pattern match result of characters and images such as “secret” and “secret” included in the file. Is disclosed.

JP 2008-294814 A JP-A-2005-109779 JP 2009-110214 A JP 2011-180635 A JP 2004-185568 A JP 2006-340320 A

  However, in the techniques described in Patent Documents 1-4, a file displayed on the information processing terminal is viewed only by a user having viewing authority, and not only by the user but also by another person who does not have viewing authority. It cannot be distinguished from the state that may be present. That is, for example, it is possible to deal with a situation in which a customer makes a presentation for a customer by connecting an information processing terminal to a projector and then proceeds with a meeting while only a user browses confidential materials on the same information processing terminal screen. Thus, appropriate display control for preventing leakage of confidential information cannot be performed.

  In addition, even with the methods described in Patent Documents 5 and 6, it is difficult to add confidential attributes, or for files in a format that is not common (for example, text files, PDF files, JPEG files, etc.) It is difficult to perform typical display control. In addition, in an application such as an instant messenger (IM), for example, it is difficult to perform a determination based on a confidential attribute of a file or a pattern match. Therefore, the methods described in Patent Documents 5 and 6 are not sufficient from the viewpoint of preventing leakage of secret information.

  The present invention has been made to solve such problems, and an object thereof is to appropriately perform display control of a file used in an information processing terminal.

  Other problems and novel features will become apparent from the description of the specification and the accompanying drawings.

  A display control device according to the present invention includes a first display, a second display, data, and an attribute indicating a position condition for permitting the second display to display the data. According to a comparison result between the current position and the position condition included in the attribute, and the display of the data on the second display. And a drawing control means for restricting.

  Another display control device according to the present invention includes a first display, a second display, an application identifier, and an attribute indicating a position condition for permitting display of the application to the second display. Storage means for holding a black list, position information acquisition means for acquiring a current position, display of the application on the second display, the current position, and the position condition included in the attribute And a drawing control means for limiting according to the comparison result.

  The display control method according to the present invention includes a step of reading a file including data and an attribute indicating a position condition for permitting the second display to display the data, and a position information acquisition step of acquiring a current position. And a drawing control step for restricting the display of the data on the second display according to a comparison result between the current position and the position condition included in the attribute.

  Another display control method according to the present invention includes a step of referring to a black list including an application identifier and an attribute indicating a position condition for permitting display of the application to a second display, and a current position. A position information acquisition step for acquiring, and a drawing control step for limiting display of the application on the second display according to a comparison result between the current position and the position condition included in the attribute. Is.

  The program according to the present invention is a program for causing a computer to execute the display control method.

  According to the present invention, it is possible to provide a display control device, a display control method, and a program that can appropriately perform display control of a file used in an information processing terminal.

It is a figure which shows the structure of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the example of the application use file log | history table 105 of embodiment of this invention. It is a figure which shows the concept of the IRM encapsulation file 111 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of the information processing terminal 100 of embodiment of this invention. It is a figure which shows the process of embodiment of this invention.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. First, a configuration example of an information processing terminal 100 as a display control apparatus according to an embodiment of the present invention will be described with reference to FIG.

  The information processing terminal 100 includes a CPU, a memory, an HDD, and the like, and is a general information processing apparatus on which a user can execute various programs. For example, a personal computer (PC), a tablet terminal, a smartphone, or the like is there.

  The information processing terminal 100 includes an IRM decapsulation unit 101, an application 102, a window title monitoring unit 103, a position information acquisition unit 104, an application use file history table 105, an application drawing monitoring unit 106, an application drawing control unit 107, and a display display area acquisition. Means 108, OS 109, disk 110, built-in display 112, and external display 113. The disk 110 includes an IRM encapsulated file 111 and a black list 114.

  The IRM decapsulating unit 101 adds a right attribute to a file in a general format (that is, a file that can be opened by an arbitrary application and does not have a right attribute) and converts the file into a dedicated format (IRM encapsulation). The file 111 is converted into an original general format file (decapsulated). For example, the AppCage® FRM, which is Applicant's product, may provide such functionality. The InfoCage FRM automatically opens the IRM-encapsulated file 111 when the user performs an operation to open the IRM-encapsulated file 111 using a general file management program (eg, Windows (registered trademark) OS Explorer). Thus, the original general format is converted, and the converted file is opened by the corresponding application 102. As described above, the IRM decapsulation unit 101 provides the user with the operability of handling the IRM encapsulated file 111 in the same manner as a file in a general format.

  The application 102 is an application program executed on the information processing terminal 100, and is used by a user to view or edit a file. For example, application programs such as text editing, image browsing, and document browsing are assumed. The information processing terminal 10 can also execute a plurality of applications at the same time.

  The window title monitoring unit 103 monitors the window title of the application 102 and provides auxiliary information for identifying the file being used to the application drawing monitoring unit 106.

  The location information acquisition unit 104 acquires the current location information of the terminal. The position information of the terminal can be measured by various means such as a GPS signal, wireless LAN access point information, Near Field Communication (NFC), and the like. The position information is expressed by a combination of latitude and longitude, for example.

  The application use file history table 105 records a correspondence relationship between the file decapsulated by the IRM decapsulation unit 101 and the application 102 that opened the file.

  The application drawing monitoring unit 106 hooks a drawing function call to the OS 109 of the application 102 and uses the information acquired from the window title monitoring unit 103 and the application use file history table 105 to determine an application display condition. Further, the application drawing monitoring unit 106 calls the drawing function of the application drawing control unit 107 by designating display conditions.

  The application drawing control unit 107 acquires the terminal state from the position information acquisition unit 104 and the external display connection monitoring unit 108. Further, a predetermined drawing function is provided to the application drawing monitoring unit 106 according to the acquired terminal state and the display condition specified by the application drawing monitoring unit 106. This drawing function can perform different drawing depending on whether the drawing destination area is included in the built-in display 112 or the external display 113.

  The display display area acquisition unit 108 acquires the coordinates of the display area of the built-in display and the coordinates of the display area of the external display including the projector and the large screen display monitor from the OS 109.

  The OS 109 is an operating system (OS) executed on the information processing terminal 100. Here, for example, an OS having a general function such as Windows (registered trademark) is assumed.

  The disk 110 is a storage device that stores files used by the application 102.

  The IRM encapsulated file 111 is a file obtained by adding information on a position that can be externally projected as a right attribute to a file in a general format such as text, PDF, or image, and converting it into a dedicated format. The schematic diagram of FIG. 3 shows the relationship between the original file and the IRM-encapsulated file. The IRM encapsulated file 111 is stored on the disk 110. This IRM encapsulated file 111 can also be realized by adding information on external projectable positions to an existing IRM (Information Rights Management) mechanism such as InfoCage FileShell (registered trademark), for example. .

  The built-in display 112 is a display monitor built in the information processing terminal 100. In the present embodiment, it is assumed that only one user of the information processing terminal 100 sees the display content of the built-in display 112.

  The external display 113 is an external display monitor connected to the information processing terminal 100. What this device is actually depends on the situation, for example, when a work display monitor is connected and only one user is viewing the display content, a projector or a large screen display monitor is connected and the participant of the conference This can be the case when projecting presentation materials. Note that the external display 113 may not necessarily be connected to the information processing terminal 100.

  The black list 114 includes position information indicating a safe place (for example, in-house) and a list of applications 102 that should be prohibited from being displayed on the external display 113 outside the safe place.

  The application activation monitoring unit 115 monitors the activation of the application 102 that has not been activated by the IRM decapsulation unit 101. Specifically, the application activation monitoring unit 115 checks whether the application 102 is registered in the black list 114 when the application 102 is activated. If it is registered, a function of the application drawing control means 106 is called by registering a hook in the drawing function call of the application 102.

  FIG. 2 is an example of the application use file history table 105. Each line after the second line represents one record.

  In the process ID column, a process ID that can uniquely identify the application that opened the file is recorded. In the file path column, the path of the IRM encapsulated file before being converted by the IRM decapsulating unit 101 is recorded. In the displayable position condition column, a condition of a position that can be displayed on the external display 113 is recorded according to the right attribute of the file recorded in the file path column.

  The addition of the record to the application use file history table 105 is executed when the IRM encapsulated file 111 is converted into a general format by the IRM decapsulating unit 101 and opened by the application 102. Further, when the application 102 is terminated, a record having a process ID column equal to the process ID of the application 102 is deleted.

  In the example of FIG. 2, the application 102 whose process ID is “P1” unencapsulates and opens the IRM encapsulated file 111 whose file path is “C: \ aaa \ bbb \ ccc.txt.xxx”. In some cases, this file can be displayed on the external display 113 only “in-house”.

  As can be seen from the second and third lines, the application 102 having the same process ID opens a file (ddd.pdf.xxx), and before the application 102 ends, another file (fff.pdf) .Xxx) may be opened. Further, as can be seen from the fourth and fifth lines, the application 102 may open a file with the same name (hh.jpg.xxx) in a different directory.

  Next, the operation of the information processing terminal 100 will be described. First, an outline of the operation of the information processing terminal 100 will be described.

  The information processing terminal 100 restricts display on the external display when the application 102 attempts to draw a file on the screen that is prohibited from being externally displayed at the current position. More specifically, it operates so as to use a different drawing method depending on whether the output destination is an internal display or an external display. In order to determine whether the file is prohibited from external display at the current position, the external displayable position condition included in the right attribute of the encapsulated file 111 is used. Thereby, it is possible to determine whether or not external display is possible in units of files that the application 102 opens. Here, the file currently opened by the application 102 can be identified by examining the file name included in the window title character string of the application 102. When the application 102 does not include the file name in the window title character string, it is possible that all the files opened since the application 102 was started are still open. Under the premise, the external displayable position condition is examined. Further, screen display by the application 102 that is difficult to control display in units of files or that is not normally used for presentation is limited by the blacklist method.

  Next, the operation of the information processing terminal 100 will be described in detail using the flowcharts of FIGS. 4 to 10.

(Process when opening a file)
FIG. 4 is a flowchart showing processing when opening a file.

  In step S101, the user performs an operation to open the encapsulated file 111. The OS 109 activates the IRM decapsulation unit 101 associated in advance with the encapsulated file. The IRM decapsulation means 101 reads the encapsulated file 111 and temporarily stores the decapsulated file.

  In step S102, the IRM decapsulation unit 101 opens the file (original file) decapsulated in step S101 with the application 102 previously associated with the original file.

  In step S <b> 103, the IRM decapsulation unit 101 confirms whether a hook is registered in the drawing function call of the application 102. If not registered, the process proceeds to step S104, and if already registered, step S104 is skipped and the process proceeds to step S105.

  In step S <b> 104, the IRM decapsulation unit 101 registers a hook in the drawing function call of the application 102. As a result, when the application 102 calls the drawing function of the OS 109, a function provided in the application drawing monitoring unit 106 is called instead.

In step S <b> 105, the IRM decapsulation unit 101 compares the process ID of the application 102, the path of the read encapsulated file 111, and the right attribute added to the read encapsulated file 111 with respect to the application use file history table 105. Add a record that includes external displayable position conditions.
This completes the process for opening the file.

(Processing when the application ends)
FIG. 5 is a flowchart showing the operation at the end of the application.

  In step S201, when the application 102 ends, the IRM decapsulation unit 101 detects this by means such as event notification.

  In step S202, the IRM decapsulation unit 101 acquires the process ID of the terminated application 102.

In step S203, the IRM decapsulation unit 101 deletes a record having the same value as the process ID acquired in step S202 in the process ID column from the application use file history table 104.
This completes the operation for terminating the application.

(Process after opening the file)
FIG. 6 is a flowchart showing the operation of the application after opening the IRM encapsulated file.

  In step S301, the application 102 tries to call a drawing function of the OS 109 in order to draw a window or the like on the screen.

  However, in step S302, the function of the application drawing monitoring unit 106 is called by the hook registered in step S104 described above.

  In step S303, the function of the application drawing monitoring unit 106 called by the hook acquires the process ID of the calling application 102.

  In step S304, the application drawing monitoring unit 106 calls the window title monitoring unit 103, and acquires the character string set in the window title of the application 102 using the process ID acquired in step S303.

  In step S305, the application drawing monitoring unit 106 acquires all records having the same value as the process ID acquired in step S303 in the process ID column from the application use file history table 105, and expands from the file path column of these records. Extract the file name excluding children. Then, it is confirmed whether or not there is a part where these file names are completely matched in the window title character string acquired in step S304. If there is a completely matching file name in the window title character string, the process proceeds to step S305-1. If not, the process proceeds to step S305-2.

  In step S305-1, the application drawing monitoring unit 106 extracts external displayable position conditions from all the records having the file names that completely match in step S305, and collects them as a list of external displayable position conditions. This is because when files with the same file name exist in different directories, there may be a plurality of records having the exact file name, and the application 102 will only have those records with the file name included in the window title string. This is because it is impossible to determine which record corresponds to the currently opened file. Therefore, all records having the same file name are handled as records of the file currently opened by the application 102.

  On the other hand, in step S305-2, the application drawing monitoring unit 106 extracts external displayable position conditions from each record of the application use file history table 105 acquired in step S305, and uses them as a list of external displayable position conditions. To summarize.

  In step S306, the application drawing monitoring unit 106 creates the external display created in step S305-1 or S305-2 by using the drawing function of the application drawing control unit 107 corresponding to the drawing function that the application 102 attempted to call in step S301. Call by specifying a list of possible position conditions.

(Processing of application drawing control means 107)
Next, the operation of the application drawing control unit 107 will be described using the flowchart of FIG.

  When the drawing function of the application drawing control unit 107 is called from the application drawing monitoring unit 106 in step S306 described above, in step S401, the application drawing control unit 107 uses the position information acquisition unit 104 to calculate the latitude of the information processing terminal 101. Get the current position information expressed as a pair of and longitude.

  In step S402, the application drawing control unit 107 acquires one external displayable position condition from the list of external displayable position conditions designated when called from the application drawing monitoring unit 106 in step S306.

  In step S403, the application drawing control unit 107 compares the location included in the external displayable position condition acquired in step S402 with the current position of the information processing terminal 101 acquired in step S401. Determine if the drawing is in a position where it can be output to an external display. For example, a set of latitude and longitude of the external displayable position condition is registered in advance in a table (not shown), and the application drawing control unit 107 determines the distance between the latitude and longitude of the external displayable position condition and the longitude and latitude of the current position. However, when the predetermined threshold value is not exceeded, it can be determined that the position is a position that can be output to the external display. As a result of the determination, if the terminal satisfies the external displayable position condition, the process proceeds to step S404; otherwise, the process proceeds to step S406.

  In step S404, the application drawing control unit 107 checks whether an undetermined condition remains in the list of external displayable position conditions. If it does not remain, the process proceeds to step S405, and if it remains, the process returns to step S402 to repeat the determination of the remaining conditions.

  Here, when there are a plurality of conditions in the list of external display position possible conditions to be processed, it is a state where a single file opened by the application 102 cannot be specified. At this time, the conditions included in the list are external displayable position conditions for all the files that the application 102 may possibly display contents of. In order to reliably prevent a file whose external display is set to be prohibited at the current position from being displayed on the external display, it is preferable to prohibit external display of the application 102 if there is even one that violates the conditions.

  In step S405, the drawing function of the OS 109 is called, and the application 102 draws the content to be drawn in step S301 as it is and ends. This is because the application drawing control means 107 has found that the drawing content can be externally displayed at the current terminal position as a result of the processing of steps S402 to S404.

  In step S406, the application drawing control means 107 executes a drawing function for displaying only on the built-in display, and ends. This is because, as a result of the determination in step S403, there is a possibility that the drawing content includes an object that cannot be displayed at the current terminal position.

(Drawing function processing that displays only on the built-in display)
Next, the operation of the rendering function that displays only on the built-in display, which is executed in step S406, will be described using the flowchart of FIG.

  In step S501, the application drawing control unit 107 acquires the coordinates of the drawing destination area from the parameters of the function.

  In step S <b> 502, the application drawing control unit 107 acquires the coordinates of the display area of the built-in display and the coordinates of the display area of the external display from the external display connection monitoring unit 108. Then, it is determined whether or not the drawing destination area acquired in step S501 is entirely included in at least one of the display area of the built-in display and the external display. As a result of the determination, if all the drawing destination areas are included in at least one of the display areas of the display, the process proceeds to step S503. Otherwise, the process proceeds to step S506.

  In step S503, the application drawing control unit 107 determines whether the drawing destination area is included in the display area of the built-in display or the display area of the external display. If it is included in the display area of the built-in display, the process proceeds to step S504; otherwise, the process proceeds to step S505. At this time, if the display mode of the information processing terminal 100 is the so-called clone mode in which the same content is displayed on the internal display and the external display, the process proceeds to step S505.

  In step S504, the application drawing control unit 107 calls the drawing function of the OS 109, draws the drawing contents as they are, and ends.

  In step S505, the application drawing control unit 107 processes the drawing contents so that the contents cannot be identified, calls the drawing function of the OS 109, draws, and ends. For processing the drawing contents, various methods can be used, such as filling the drawing destination area with white or black, displaying only the outer edge of the drawing destination area with a frame line, or not drawing at all.

  Step S506 is processing when it is determined in step S502 that the drawing destination area extends over both the display area of the built-in display and the display area of the external display. The application drawing control means 107 divides the drawing destination area into a part included in the display area of the internal display and an area included in the display area of the external display.

  In step S507, the application drawing control unit 107 draws the drawing contents on a virtual screen in the memory that is not actually displayed on the internal display or the external display.

  In step S508, the application drawing control unit 107 processes the portion of the content drawn on the virtual screen in step S507, which is divided in step S506 and included in the display area of the external display, as processed in step S505. Overwrite with.

  In step S509, the application drawing control unit 107 copies the contents of the virtual screen drawn in steps S507 and S508 to the actual display area and ends.

(Display restriction using black list)
With reference to the flowchart of FIG. 9, an operation when performing display restriction on the application 102 that is not the application that opened the IRM-encapsulated file 111 will be described.

  In step S601, the application activation monitoring unit 115 detects that the application 102 has been newly activated.

  In step S602, the application activation monitoring unit 115 determines from the parent process information or the like whether the activated application 102 is activated in step S102. If the application 102 is activated in step S102, the process ends. Otherwise, the process proceeds to step S603.

  In step S603, the application activation monitoring unit 115 reads the black list 114, searches the list, and determines whether there is a name that matches the application 102 that detected activation. If there is a matching name in the black list 114, the process proceeds to step S604. Otherwise it ends.

  In step S604, the application activation monitoring unit 115 registers a hook in the same manner as in step S104 for the drawing function call of the OS 109 of the application 102 that has detected activation.

  Next, the operation when the application 102 registered in the black list 114 performs drawing will be described using the flowchart of FIG.

  In step S701, the application 102 calls a drawing function.

  In step S702, the drawing function call is hooked, and the function of the application drawing monitoring unit 106 is called.

  In step S <b> 703, the application drawing monitoring unit 106 confirms that there is no process ID of the application 102 registered in the black list in the application use file history table 105. If not, the external display position condition stored in the black list 114 is acquired. As the external displayable position, for example, a position where information can be safely externally displayed is stored, for example, only in the office.

  In step S704, the application drawing monitoring unit 106 specifies the external display position condition acquired in step S703 and calls the drawing function of the application drawing control unit 107. Subsequent processing continues to step S501.

  According to the present embodiment, when the information processing terminal 100 opens a file to which an external displayable position condition is added in advance, the information processing terminal 100 acquires information on the current position, compares the current position with the external displayable position condition, If the file is a file for which external display is prohibited, control is performed to display only on the built-in display. Thereby, it is possible to prevent an accident in which a file containing confidential information is mistakenly shown to others.

  That is, according to the present embodiment, the internal display and the external display are distinguished as display destinations of the file contents, so that it is possible to prevent others from seeing secret information via the external display while using the same terminal in the same place. In addition, the user can freely view and edit files containing confidential information on the built-in display. Thus, for example, at a lecture, when the user connects the information processing terminal 100 to an external display such as a projector and displays a document on the external display to give a lecture, the secret information is unspecified by mistake. Accidents that can be shown to other people can be prevented. At the same time, when listening to other people's lectures at the same venue, files such as memos containing their own confidential information can be edited using the built-in display. Further, for example, when a meeting is held with a customer in a meeting room in the customer's company, the user connects an external display such as a projector to the information processing terminal 100, displays a document on the external display, and gives a presentation. In the same meeting room, a file including confidential information can be displayed on the built-in display of the information processing terminal 100, and the meeting can be advanced while viewing the confidential information.

  In addition, according to the present embodiment, display is restricted using position information, so that flexible display control is possible. For example, even if the file contains confidential information, if the confidential information is related to the customer's confidential information, the file can have an attribute that can be displayed in the customer's company. . As a result, the file can be displayed on the external display in the customer's office, and convenience can be improved, such as meeting a large number of people.

  Furthermore, according to the present embodiment, the information processing terminal 100 stores data in a dedicated format in which a right attribute including a location condition is added to a file in a general format such as a text file or a PDF file. Conversion from this dedicated format to a general format can be performed smoothly. Then, the information processing terminal 100 controls drawing processing of an application that uses a file in a general format converted from the file in the dedicated format based on the right attribute attached to the dedicated format. As a result, display restriction can be performed on a file of a format that is generally widely used. Therefore, it is possible to widely suppress the risk of information leakage.

  Further, according to the present embodiment, display restriction using a black list can be performed. As a result, it is possible to prevent information leakage by an application such as an instant messenger, which is difficult to restrict display by the right attribute of the file.

<Other embodiments>
Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, it is assumed that the information processing terminal 100 is a portable device, but the information processing terminal 100 is fixedly installed in the office or the like, and is a thin client terminal or other portable device. The terminal may be connected by a technique such as Virtual Network Computing (VNC) and remotely control the information processing terminal 100. In this case, the position information of the terminal and the information of the built-in display and the external display are not the information processing terminal 100 but the information of the remotely operated terminal, that is, the thin client terminal and other portable terminals.

  Further, in the above-described embodiment, in order to restrict display on the external display, a technique of hooking a drawing function call by an application and calling a unique drawing function is used. However, as another display restriction method, a method of forcibly minimizing the window of the application 102 including contents that cannot be displayed at the current terminal position, so that it is not displayed on either the internal display or the external display. It is also possible to use it. In this case, when the information processing terminal 100 detects the connection of the external display, it determines whether external display is possible for each application 102 by the same means as in the above embodiment, and determines that external display is impossible. The operation of minimizing the window of the applied application 102 is performed. Further, when the minimized window of the application 102 is restored to the original size, it is preferable to restore it to the display area of the built-in display regardless of the position before minimization.

  In the above-described embodiment, the present invention has been mainly described as a hardware configuration. However, the present invention is not limited to this, and a CPU (Central Processing Unit) executes a computer program for arbitrary processing. Can also be realized. In this case, the computer program can be stored and provided to the computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

DESCRIPTION OF SYMBOLS 100 Information processing terminal 101 IRM decapsulation means 102 Application 103 Window title monitoring means 104 Position information acquisition means 105 Application use file history table 106 Application drawing monitoring means 107 Application drawing control means 108 Display display area acquisition means 109 OS
110 disk 111 IRM encapsulated file 112 internal display 113 external display 114 blacklist

Claims (10)

A first display;
A second display;
Storage means for holding a file, including data and an attribute indicating a position condition for permitting the second display to display the data;
Position information acquisition means for acquiring the current position;
A display control apparatus, comprising: a drawing control unit that limits display of the data on the second display according to a comparison result between the current position and the position condition included in the attribute. Generate an original file containing the data from the file,
Further comprising decapsulation means for launching an application pre-associated with the original file;
The display control apparatus according to claim 1. The display control device according to claim 2, wherein the decapsulation unit hooks a drawing function call of the application to operate the drawing control unit. The drawing control means is a case where the current position and the position condition are regarded as different positions, and when displaying the data on the second display,
The display control apparatus according to any one of claims 1 to 3, wherein display contents are processed so that the data cannot be discriminated and a drawing function of an operating system is called. When the drawing control means is considered that the current position and the position condition are different positions,
The display control apparatus according to claim 1, wherein the window in which the data is displayed is minimized. A first display;
A second display;
Storage means for holding a black list, including an application identifier and an attribute indicating a position condition for permitting display of the application to the second display;
Position information acquisition means for acquiring the current position;
A display control apparatus, comprising: a drawing control unit that restricts display of the application on the second display according to a comparison result between the current position and the position condition included in the attribute. The display control device according to claim 1, wherein the storage unit, the position information acquisition unit, and the drawing control unit are arranged at different positions and are communicably connected to each other. Reading a file including data and an attribute indicating a positional condition permitting display of the data to a second display;
A position information acquisition step for acquiring the current position;
A display control method, comprising: a drawing control step of restricting display of the data on the second display according to a comparison result between the current position and the position condition included in the attribute. Referencing a blacklist, comprising: an application identifier; and an attribute indicating a position condition for allowing display of the application to a second display;
A position information acquisition step for acquiring the current position;
A display control method, comprising: a drawing control step of restricting display of the application on the second display according to a comparison result between the current position and the position condition included in the attribute.   A program for causing a computer to execute the display control method according to claim 8 or 9.

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