JP2009086922A - Program editing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a program editing device for easily grasping a nest structure without complicated operations. <P>SOLUTION: The device includes a text display information generation unit 5 for generating a program text; a nest character string determining unit 8 extracting a nest character string from the text; a nest structure display information generation unit 11 for generating nest structure display information corresponding to the character string extracted by the determining unit 8; and, when displaying the text generated from the generation unit 5 on a screen, and a text/nest structure display combination unit 13 for associating the nest character string extracted by the determining unit 8 with the nest structure display information generated from the generation unit 11 to combination-display the associated nest structure display information on the screen in an area independent of the text. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a program editing apparatus for editing a text-based program.

  First, an example of a programming language will be described. For example, a controller programming language defined in IEC 61131-3 which is an international standard is defined. More specifically, five types of LD (ladder diagram), FBD (function block diagram), SFC (sequential function chart), ST (structured text), and IL (instruction list) are defined. ing.

  Among these programming languages, LD, FBD, and SFC are called graphical languages, and components for each program are arranged on the screen. Each component is programmed by being connected graphically. On the other hand, ST and IL are called text-based (non-graphical) languages, and are programmed by arranging character strings on a screen.

  In addition to programming languages for controllers, various text-based programs such as C, ASM (assembly language), BASIC (Beginner's All purpose Symbolic Instruction Code), PL / M (Programming Language for Microcomputer), FORTLAN (FORmula TRANslation), etc. Language exists.

  In general, a program includes a program block describing processing contents such as a subroutine and a function, and branch processing called flow control such as conditional branching, unconditional branching, and repetition. When executing the program, program blocks and branches are selected as necessary, and the process proceeds.

  These program blocks and flow control are represented by respective symbols in the graphical language and represented by respective character strings in the text-based language. Hereinafter, these program blocks and flow control are expressed as nesting, the hierarchy of nesting is expressed as a nesting level, and a character string indicating the type of nesting is expressed as a nested character string.

  In the graphical language, the shape of each part itself and the connection relationship between each part are graphically displayed / printed. For this reason, the nested structure of the program is relatively easy to understand.

  On the other hand, in order to grasp the structure of a program in a text-based language, it is necessary to identify user variables, comments, and reserved words determined for each language one by one by the sequence of characters. In a text-based language, it is a character string (nested character string) belonging to this reserved word that determines a nested structure. In other words, in order to correctly grasp the nested structure, it is necessary to correctly extract this nested character string from the character strings constituting the entire program. However, if the program text is simply displayed left-justified, it is difficult to correctly extract the nested structure. That is, the visibility of the program is too bad.

  Thus, when editing a text-based program, indentation is often used to display nested hierarchy levels. This indentation is for display purposes only. That is, the indentation does not affect the execution of the program. Therefore, even if the relationship between the indentation amount and the nesting depth is not unified, no error will occur when compiling the program.

  Therefore, when the indentation operation is entrusted to the program input person, the indentation amount may differ for each input person. In addition, even the same input person may change the indentation amount according to the feeling at the time of input. Furthermore, as a matter of course, the amount of indentation may be wrong due to misunderstanding at the time of input. Therefore, in a text-based program, the display of the nested structure tends to be ambiguous. That is, when the program is read, the recognition of the nested structure is often wrong.

  Therefore, some program editing functions such as Microsoft Visual Studio (registered trademark) automatically perform indentation. However, when reading the program, it is necessary to know the amount of indentation in order to check the nesting level. Here, the indentation part is comprised with the blank. Therefore, when it is displayed on the screen, it can be counted using the cursor key. However, when printed, it is difficult to count the number of blank characters. Furthermore, if the display distance from the start to the end of the nest is long, it is difficult to grasp the nest structure. In addition, a blank part, which is not related to the program logic, is required in the program. Therefore, as the nesting level deepens, there is a problem that the important logic part is gradually driven to the right. Further, during the new program creation or remodeling, indentation not desired by the program input person is automatically performed in a portion where the nest structure is not completed, and there is a problem that visibility is lowered.

  Therefore, in order to solve the above problem, in the program editing apparatus that displays the data structure of the program on the schematic representation, the selected item (corresponding to the data type being selected (input) on the graphical representation) Levels generated based on the item selected in the level symbol of the control level diagram and the control level diagram for the selected item is displayed corresponding to the group item, basic item, independent item, etc. There has been proposed one that displays a data structure characterized by being configured to display by setting a number (see, for example, Patent Document 1).

JP-A-5-233251

  However, the device described in Patent Document 1 has to input a nested structure (data structure) in addition to the program input. As a result, there is a problem that the program input person is forced to perform complicated input work.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a program editing apparatus that can easily grasp a nested structure without requiring a complicated operation.

  A program editing apparatus according to the present invention is a program editing apparatus that edits a text-based program, a text display information generation unit that generates program text, and a nested character string determination unit that extracts a nested character string from the program text; In the case of displaying on the screen the nested structure display information generating unit that generates the nested structure display information corresponding to the nested character string extracted by the nested character string determining unit, and the program text generated by the text display information generating unit The nested character string extracted by the nested character string determination unit is associated with the nested structure display information generated by the nested structure display information generation unit, and the associated nested structure display information is independent of the program text. Text / nested structure display to be synthesized and displayed on the screen in the area It is obtained by a formed part.

  The present invention is a program editing apparatus for editing a text-based program, a text display information generating unit for generating program text, a nested character string determining unit for extracting a nested character string from the program text, and the nested character string The nested structure display information generating unit that generates the nested structure display information corresponding to the nested character string extracted by the determining unit, and the program text generated by the text display information generating unit is displayed on the screen. The nested character string extracted by the column determining unit is associated with the nested structure display information generated by the nested structure display information generating unit, and the associated nested structure display information is displayed on the screen in an area independent of the program text. A text / nested structure display composition unit for composition display It is, without requiring a complicated operation, can be easily grasped nested structure.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a block diagram of a program editing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing an example of nesting of programs used in the program editing apparatus according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing a screen of the program editing apparatus according to Embodiment 1 of the present invention. FIG. 4 is a diagram showing a program text display portion which is a part of the screen of the program editing apparatus according to Embodiment 1 of the present invention. FIG. 5 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to Embodiment 1 of the present invention.

  In FIG. 1, 1 is a keyboard. Reference numeral 2 denotes a storage device. The keyboard 1 and the storage device 2 are connected to the text input unit 3. The text input unit 3 is used to input program text from the keyboard 1 or the storage device 2. The text input unit 3 is connected to the text information holding unit 4. The text information holding unit 4 holds the program text input to the text input unit 3.

  The text information holding unit 4 is connected to the text display information generating unit 5. The text display information generation unit 5 processes control characters such as tabs and line feeds in the text. The text display information generation unit 5 is connected to a monitor 6 and a printer 7. The monitor 6 displays the program text generated by the text display information generating unit 5 on the screen. On the other hand, the printer 7 prints the content displayed on the screen of the monitor 6. The edited program text is stored in the storage device 2 from the text information holding unit 4 via the text input unit 3.

  Furthermore, the text information holding unit 4 in the present invention is also connected to a nested character string determination unit 8. The nested character string determination unit 8 is connected to the nested character string setting unit 9. The nested character string setting unit 9 stores the nested character string information of the program text. Nesting refers to program blocks and flow control. This nesting depends on the programming language. For example, in a text-based language called Microsoft Visual Basic for Application (VBA), there are nesting types as shown in FIG. A character string indicating the type of nesting is called a nested character string. The nesting hierarchy is called a nesting level.

  The nested character string determination unit 8 extracts a nested character string from the program text input from the text information holding unit 4 based on the nested character string information of the nested character string setting unit 9. The nested character string determination unit 8 is connected to the nest level determination unit 10. The nest level determination unit 10 determines the nest level of the nest character string determined by the nest character string determination unit 8.

  The nest level determination unit 10 is connected to the nest structure display information generation unit 11. The nest structure display information generation unit 11 is connected to the nest structure display setting unit 12. The nest structure display setting unit 12 stores the expression pattern of the nest structure. Then, the nest structure display information generation unit 11 generates nest level information input from the nest level determination unit 10 based on the expression pattern information of the nest structure display setting unit 12. The nest structure display information generation unit 11 is connected to the text / nest structure display synthesis unit 13. The text / nested structure display synthesis unit 13 is connected between the monitor 6 and the printer 7 on the output side of the text display information generation unit 5.

  The text / nested structure display combining unit 13 then displays the nested character string extracted by the nested character string determination unit 8 when the program text generated by the text display information generation unit 5 is displayed on the screen of the monitor 6. The nested structure display information generated by the nested structure display information generating unit 11 is associated, and the associated nested structure display is synthesized and displayed on the screen of the monitor 6 in an area independent of the program text.

  Next, the screen display of the monitor 6 will be described in more detail with reference to FIGS. In FIG. 3, reference numeral 14 denotes a text display portion of the screen of the monitor 6. Program text is displayed on the text display unit 14. FIG. 4 shows only the text display unit 14. As shown in FIG. 4, the program text is displayed with the left ends aligned. In FIG. 3, reference numeral 15 denotes a nested structure display portion of the screen of the monitor 6. FIG. 5 shows only the nest structure display portion 15. The nest structure display unit 15 is provided on the left side of the text display unit 14. The nest structure display information generated by the nest structure display information generation unit 11 is displayed on the nest structure display unit 15.

  In the first embodiment, the nested structure display information is a graphic type. More specifically, a horizontal line 15a is displayed on the left side of the same nested character string. And the left end of these horizontal lines 15a is connected by the vertical line 15b. Thereby, a nested structure is expressed. Further, the vertical line of the lower nested structure display information is displayed on the right side of the vertical line of the higher nested structure display information. Thereby, the hierarchical relationship of the nested structure is shown.

  In the first embodiment described above, the nest structure can be easily grasped without requiring complicated work. Therefore, the efficiency at the time of program creation and decoding is improved. In addition, no indentation is required. Therefore, there is no need for space on the screen for identifying the nest level. In addition, the program text that is the substance of the original program and the nested structure display unit 15 are managed independently of each other. Therefore, indentation in the program text can be appropriately performed based on the content of the nested structure display information displayed on the nested structure display unit 15. It goes without saying that the program text printed by the printer 7 is also improved in decoding efficiency.

Embodiment 2. FIG.
FIG. 6 is a diagram showing a screen of the program editing apparatus according to the second embodiment of the present invention. FIG. 7 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  The nested structure display information in the first embodiment is a graphic type. On the other hand, the nested structure display information in the second embodiment is a text type. More specifically, it is shown in FIG.

  That is, the highest nesting level is displayed with the number 1 on the left side of the nest structure display portion 15. And as the nesting level becomes lower, it is displayed like numerals 12 and 123. Furthermore, minus is displayed after the number at the beginning and end of the nest. In the middle of nesting, a plus is displayed after the number.

  According to the second embodiment described above, the same effect as in the first embodiment can be obtained. Furthermore, the hierarchical relationship of the nested structure can be understood more intuitively with numbers.

Embodiment 3 FIG.
FIG. 8 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  The nested structure display information in the first embodiment is a graphic type. On the other hand, the nested structure display information in the third embodiment is a mixed type of graphic type and text type. More specifically, it is shown in FIG.

  That is, the graphic portion is the same as that in the first embodiment. A number is displayed on the left side of the graphic type nested structure display information as in the second embodiment. However, considering the space, the numbers 1, 2, 3,... Are displayed as the nesting level becomes lower.

  According to the third embodiment described above, the same effects as in the first and second embodiments can be obtained. Furthermore, the hierarchical relationship of the nested structure can be understood more intuitively with graphics and numbers.

Embodiment 4 FIG.
FIG. 9 is a diagram showing a screen of the program editing apparatus according to the fourth embodiment of the present invention. FIG. 10 is a diagram showing a program text display portion which is a part of the screen of the program editing apparatus according to Embodiment 4 of the present invention. FIG. 11 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the text display unit 14 in the first to third embodiments, the program text is displayed with the left end aligned. That is, there was no indentation. On the other hand, in the text display unit 16 according to the fourth embodiment, indentation of four half-width characters is performed for each nesting level.

  In the first to third embodiments, the text display unit 14 and the nested structure display unit 15 do not overlap on the screen. On the other hand, in the fourth embodiment, the left side of the text display unit 16 and the right side of the nested structure display unit 17 overlap. Thus, an appropriate nested structure is displayed even for the indented nested character string.

  More specifically, the nested structure display information is shown in FIG. That is, the nested structure display information in the fourth embodiment is a graphic type as in the first embodiment. Then, it is displayed in a state of moving to the right following the indentation amount of the nested character string.

  According to the fourth embodiment described above, the same effect as in the first embodiment can be obtained. Furthermore, by indenting, the hierarchical relationship of the nested structure can be understood more intuitively.

Embodiment 5 FIG.
FIG. 12 shows a screen of the program editing apparatus according to the fifth embodiment of the present invention. FIG. 13 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The nested structure display information in the fourth embodiment is a graphic type. On the other hand, the fifth embodiment is a text type similar to the second embodiment. A minus indicating the beginning and end of nesting and a plus indicating the middle of nesting are added to the right according to the indentation amount of the nested character string.

  According to the fifth embodiment described above, the same effect as in the second embodiment can be obtained. Furthermore, by indenting, the hierarchical relationship of the nested structure can be understood more intuitively.

Embodiment 6 FIG.
FIG. 14 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the sixth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The nested structure display information in the fourth embodiment is a graphic type. On the other hand, the nested structure display information in the sixth embodiment is a mixed type of graphic type and text type. More specifically, it is shown in FIG.

  That is, the graphic type part is the same as in the fourth embodiment. A number is displayed on the left side of the graphic type as in the fifth embodiment. However, considering the space, the numbers 1, 2, 3,... Are displayed as the nesting level becomes lower. Further, a minus indicating the beginning and end of nesting and a plus indicating the middle of nesting are added to the right according to the indentation amount of the nested character string.

  Embodiments 1 to 6 are specific examples of nested structure display information. Therefore, the nested structure may be displayed by another graphic display method or a display method using another text.

Embodiment 7 FIG.
FIG. 15 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the seventh embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the seventh embodiment, the nest structure display information generation unit 11 generates nest structure display information by changing display attributes of nests at different levels. In FIG. 15, adjacent nests are distinguished by changing the line type for each level. However, the distinction may be made by thickness or line color.

  According to the seventh embodiment described above, the same effect as in the first embodiment can be obtained. Furthermore, the hierarchical relationship of the nested structure can be understood more intuitively due to the difference in line type.

Embodiment 8 FIG.
FIG. 16 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the eighth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 7, or an equivalent, and description is abbreviate | omitted.

  In the seventh embodiment, adjacent nests are distinguished by changing the line type for each level. On the other hand, in the eighth embodiment, every other adjacent nest is distinguished by changing the line type. Note that n line types may be prepared, and display attributes may be circulated and used for every n levels.

  According to the eighth embodiment described above, the same effect as in the first embodiment can be obtained. Furthermore, by reducing the difference in line type, a simpler program editing apparatus than that of the seventh embodiment is realized.

  In the seventh embodiment and the eighth embodiment, the case where the nested structure display information is a graphic type has been described. However, even when the nested structure display information is a text type, it is possible to distinguish the nesting level. That is, the nested level may be distinguished by changing the font, character color, character thickness, character size, etc. of the text used in the nested character string.

Embodiment 9 FIG.
FIG. 17 is a diagram showing a nested structure display portion which is a part of the screen of the program editing apparatus according to the ninth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 7, or an equivalent, and description is abbreviate | omitted.

  In the seventh embodiment, nest structure display information is generated by changing display attributes of different levels of nests. On the other hand, in the eighth embodiment, when the nests at the same level are close to each other, the nest structure display information is generated by changing the display attributes of the nests at the same level.

  According to the ninth embodiment described above, the same effect as in the first embodiment can be obtained. In addition, adjacent nests of the same level are not mistaken for one type of nest.

  In the ninth embodiment, the case where the graphic type nested structure display information is distinguished by the line type has been described. However, in the case of graphic type nested structure display information, it is only necessary to distinguish between the line thickness and line color. In the case of text-type nested structure display information, it may be distinguished by the text used, font, character color, character thickness, character size, and the like. Furthermore, even if the display attributes are different for all the nests, or every other display attribute is different, the display attributes may be cycled every n nests. That is, the display attribute only needs to change between adjacent nests of the same level.

Embodiment 10 FIG.
FIG. 18 is a block diagram of a program editing apparatus according to Embodiment 10 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the tenth embodiment, a nested structure display instruction unit 18 is added to the first embodiment. The nest structure display instruction unit 18 is connected to the text / nest structure display synthesis unit 13. Then, the nest structure display instruction unit 18 instructs the text / nest structure display composition unit 13 to validate / invalidate the display composition of the nest structure display information by the operation of the operator. Thereby, whether or not to display all or part of the nest structure display information on the screen of the monitor 6 is switched.

  According to the tenth embodiment described above, the same effects as in the first embodiment can be obtained. Further, by hiding unnecessary nest structure display information, display contents can be simplified and display time and printing time can be reduced.

  In the tenth embodiment, the case where the nested structure display instructing unit 18 is connected to the text / nested structure display combining unit 13 has been described. However, an instruction may be issued to any part related to the display of the nested structure.

Embodiment 11 FIG.
FIG. 19 is a block diagram of a program editing apparatus according to Embodiment 11 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In the eleventh embodiment, a nested structure display range instruction unit 19 is added to the first embodiment. The nest structure display range instruction unit 19 is connected to the text / nest structure display synthesis unit 13.

  Then, the nest structure display range instruction unit 19 instructs the text / nest structure display composition unit 13 of the valid / invalid range of display composition of the nest structure display information by the operation of the operator. Thereby, it is switched whether or not the range of the specified nest structure display information is displayed on the screen of the monitor 6.

  According to the eleventh embodiment described above, the same effect as in the tenth embodiment can be obtained. Further, by switching whether or not to display the range of the nested structure display information on the screen of the monitor 6, display contents can be simplified more flexibly, and display time and printing time can be reduced.

  In the eleventh embodiment, the case where the nested structure display range instruction unit 19 is connected to the text / nested structure display combining unit 13 has been described. However, an instruction may be issued to any part related to the display of the nested structure.

Embodiment 12 FIG.
FIG. 20 is a diagram showing changes in the screen of the program editing apparatus according to the twelfth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The twelfth embodiment is the same screen display as the fourth embodiment. In the program editing apparatus according to the twelfth embodiment, when one of the nested character strings is selected, the other nested character strings included in the same nest are highlighted.

  For example, in FIG. 20, when the nested character string emphasis is instructed in a state where the nested intermediate character string b2 is selected with a mouse or a cursor key, the nested character strings included in the same nest are highlighted in a highlighted manner. The highlighted display may be any display method that can be easily distinguished from the normal display, such as color change display, blink, and separate window display.

  According to the twelfth embodiment described above, the same effects as in the fourth embodiment can be obtained. Furthermore, by highlighting other nested character strings included in the same nest, the character strings of the same nest can be recognized intuitively.

Embodiment 13 FIG.
FIG. 21 is a diagram showing a screen of the program editing apparatus according to the thirteenth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The thirteenth embodiment is the same screen display as the fourth embodiment. Then, the program editing apparatus according to the thirteenth embodiment jumps the designated character string from one of the selected nested character strings to another nested character string included in the same nest. More specifically, it is shown in FIG.

  In FIG. 21, a state in which a certain nested character string on the program text is selected with a mouse or a cursor key is indicated by an arrow displayed on the right side of the nested character string. If the instruction is given to jump down, the next nested character string of the same nest is instructed. If the instruction is to jump up, the jump is to the nested character string before the same nest. It should be noted that in the nest jump, the nest start character string (in the example of FIG. 21 does not jump above the nest start character string b or in the nest end character string (in the example of FIG. ing.

  According to the thirteenth embodiment described above, the same effects as in the fourth embodiment can be obtained. Furthermore, it is possible to improve the efficiency of program editing by jumping to the same nested character string.

Embodiment 14 FIG.
FIG. 22 is a diagram showing a screen of the program editing apparatus in the fourteenth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The fourteenth embodiment is the same screen display as the fourth embodiment. In the fourteenth embodiment, by selecting a certain nested character string, a start character string and an end character string having the same nest as the character string are recognized. Then, the scrolling of the screen is limited to the recognized start character string and end character string range of the same nest. In other words, when a nested text string in the program text is selected with the mouse or cursor key and the screen is scrolled with the nested scroll function enabled, the range of the same nested text from the start string to the end string will be exceeded. There is no scrolling that can be done.

  According to the fourteenth embodiment described above, the same effect as in the fourth embodiment can be obtained. Furthermore, by performing scrolling that does not exceed the range from the start character string to the end character string of the same nest, the contents focused on the selected nest can be confirmed.

Embodiment 15 FIG.
FIG. 23 is a diagram showing a screen of the program editing apparatus in the fifteenth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 4, or an equivalent part, and description is abbreviate | omitted.

  The fifteenth embodiment is the same screen display as the fourth embodiment. An area for displaying the nesting level is provided at the top and bottom of the screen, and the nesting level is displayed at the upper and lower ends of the screen in the area. More specifically, it is shown in FIG.

  In FIG. 23, the nested structure display information generating unit 11 generates nested structure display information by connecting horizontal lines displayed on the left side of nested character strings included in the same nest with vertical lines. In the upper and lower portions of the screen, an identifier indicating the character string nesting level is displayed in association with a vertical line. In FIG. 23, the identifier is a number.

  According to the fifteenth embodiment described above, the same effects as in the fourth embodiment can be obtained. Further, when a certain nesting level does not fit on one screen or one page at the time of printing, the identifier of the nesting level can be displayed or printed at the boundary portion of the screen or page (in FIG. 23, the upper and lower ends of the screen). Therefore, the visibility with respect to the nest straddling a screen or a page is improved.

1 is a block diagram of a program editing device in Embodiment 1 of the present invention. It is the figure which showed the example of the nesting of the program used for the program editing apparatus in Embodiment 1 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 1 of this invention. It is the figure which showed the program text display part which is a part of screen of the program editing apparatus in Embodiment 1 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 1 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 2 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 2 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 3 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 4 of this invention. It is the figure which showed the program text display part which is a part of screen of the program editing apparatus in Embodiment 4 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 4 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 5 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 5 of this invention. It is the figure which showed the nested structure display part which is a part of screen of the program editing apparatus in Embodiment 6 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 7 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 8 of this invention. It is the figure which showed the nest structure display part which is a part of screen of the program editing apparatus in Embodiment 9 of this invention. It is a block diagram of the program editing apparatus in Embodiment 10 of this invention. It is a block diagram of the program editing apparatus in Embodiment 11 of this invention. It is the figure which showed the change of the screen of the program editing apparatus in Embodiment 12 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 13 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 14 of this invention. It is the figure which showed the screen of the program editing apparatus in Embodiment 15 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Keyboard 2 Memory | storage device 3 Text input part 4 Text information holding part 5 Text display information generation part 6 Monitor 7 Printer 8 Nest character string determination part 9 Nest character string setting part 10 Nest level determination part 11 Nest structure display information generation part 12 Nest Structure display setting part 13 Text / nest structure display composition part 14 Text display part 15 Nest structure display part 15a Horizontal line 15b Vertical line 16 Text display part 17 Nest structure display part 18 Nest structure display instruction part 19 Nest structure display range instruction part 20 Arrow

Claims (9)

A program editing device for editing a text-based program,
A text display information generator for generating program text;
A nested string determination unit that extracts a nested string from the program text;
A nested structure display information generation unit that generates nested structure display information according to the nested character string extracted by the nested character string determination unit;
When displaying the program text generated by the text display information generating unit on the screen, the nested character string extracted by the nested character string determining unit and the nested structure display information generated by the nested structure display information generating unit are displayed. A text / nest structure display combining unit for combining and displaying the associated nested structure display information on the screen in an area independent of the program text;
A program editing apparatus comprising:   2. The program editing apparatus according to claim 1, wherein the nest structure display information generation unit generates nest structure display information by changing display attributes of nests at different levels.   3. The program editing apparatus according to claim 1, wherein the nest structure display information generation unit generates nest structure display information by changing display attributes of adjacent nests at the same level.   4. The program editing apparatus according to claim 1, wherein whether or not to display all or part of the nested structure display information on the screen is switched.   5. The program editing apparatus according to claim 1, wherein when a nested character string is selected, another nested character string included in the same nest as the nested character string is highlighted. .   6. The program editing apparatus according to claim 1, wherein when a nested character string is selected, a jump is made to another nested character string included in the same nest as the nested character string. When a nested character string is selected, a start character string and an end character string having the same nest as the nested character string are recognized,
The program editing apparatus according to any one of claims 1 to 6, wherein scrolling of the screen is limited to a range of recognized start character strings and end character strings of the same nest.   The nest structure display information generation unit generates the nest structure display information by connecting the horizontal lines displayed on the side of the nested character string included in the same nest with vertical lines, and at least one of the upper and lower portions of the screen 8. The program editing apparatus according to claim 1, wherein an identifier of a character string nesting level is displayed in association with the vertical line.   The content of a screen synthesized and displayed by associating the nested character string extracted by the nested character string determination unit with the nested structure display information generated by the nested structure display information generation unit is printed. The program editing apparatus according to claim 1.

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