JPH03292561A - Document input/editing device - Google Patents

Abstract

PURPOSE:To attain the automatic return of a numerical formula by deciding the turning position based on the turning conditions stored in a turnigncondition storage means when an input numerical formula exceeds the length of a line and turning the numerical formula at the decided turning position. CONSTITUTION:If an input numerical formula exceeds the length of a line in a numerical formula input/editing mode, a turning position is decided based on the turning conditions stored in a turning condition storage means. Then a turning means turns the numerical formula at the decided turning position. That is, the turning position is decided based on the turning conditions when the input numerical formula is not stored within a line. Then the formula is turned at the turning position. Thus the numerical formula is automatically turned. Then the numerical formulas can be arranged in an easy-to-understand/ easy-to-see way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to word processors, electronic editing and printing systems,
The present invention relates to a document input/editing device such as a typesetting device, and particularly to a formula input/edit method in a mode in which formulas are input and edited.

[Prior Art] 3. Some document input/edit devices have a mathematical formula editing mode, and in such document input/edit devices, users can input or edit mathematical formulas in the mathematical formula editing mode. can do.

When an input formula exceeds the line length, it is necessary to wrap the formula, but depending on the folding position, there is a risk that the formula may not be understood correctly. Therefore, the user determines an appropriate folding position, wraps the mathematical expression at the determined folding position, determines an appropriate alignment position, and aligns the continuation of the mathematical expression at the determined alignment position.

In the formula editing mode, the formula entered in this way is converted into fi! characters, symbols, etc. that make up the formula. You can move or copy all at once while maintaining the G section.

Note that the start and end of the mathematical expression editing mode can be specified by, for example, pressing a key representing the start and end of the mode, or inputting a control code representing the start and end of the mode.

Furthermore, conventionally, there has been a method in which TEX is applied in order to specify the folding position and alignment position in the mathematical expressions and to align the mathematical expressions.

In TEX, a document input/editing device can input a command that describes the characters and symbols that make up a mathematical formula, the positional relationship of the characters and symbols, a symbol that represents a wrapping position, and a symbol that represents an alignment position. Output a formula based on a command.

[Problems to be Solved by the Invention] The above-mentioned TEX is a descriptive processing language, that is, a language for interpreting text according to a certain method and performing typesetting processing. Therefore, it was difficult to use unless one was a certain level of skill.

On the other hand, there is a guided mathematical expression input method in which the user is guided and inputted sequentially the characters, symbols, etc. that make up the mathematical expression.

In this guided formula input method, a table is prepared in advance for each type of formula that stores the number of division units of the formula and the configuration information of the division units. Guide the user to input characters, symbols, etc.

Note that by including output position information in the configuration information of the division unit, it is also possible to output each character, symbol, etc. constituting the mathematical formula to the output position for each division unit.

This allows even non-experts to input mathematical formulas relatively easily.

However, in any of the above-mentioned conventional techniques, it is not possible to automatically determine the wrapping position and alignment position of lines in a mathematical formula and perform wrapping and alignment.

A first object of the present invention is to provide a document input/editing device that can automatically fold back mathematical expressions.

A second object of the present invention is to provide a document input/editing device that can automatically wrap and align mathematical formulas.

[Means for Solving the Problems] In order to achieve the above first object, the present invention provides a document input/editing device that inputs and edits a group of character strings including mathematical formulas, and outputs an edited result. a folding condition storage means for storing folding conditions stored in the folding condition storage means; A folding means is provided for determining a folding position and folding back at the folding position.

Further, in order to achieve the second object, the present invention, in addition to the above-mentioned configuration, includes a predetermined alignment condition storage means for storing, and an alignment condition based on the alignment condition stored in the alignment condition storage means. , an alignment means for determining an alignment position and aligning the folding position to the alignment position.

The above-mentioned folding condition sets, for example, at least a position before a symbol describing a binary relationship or a position before a binary operator as a folding position, and each folding position is given a priority order.

The above-mentioned alignment condition sets, for example, at least a position determined based on a symbol describing a binary relationship and a binary operator as an alignment position, and each alignment position corresponds to the above-mentioned folding position.

The folding condition storage means and the alignment condition storage means may be provided, for example, in the form of a table in a storage device constituting the document input/editing device.

Further, the folding means and the aligning means can be provided in a processing device constituting the document input/editing device.

Moreover, the priority given to the above-mentioned return position can be changed arbitrarily.

[Operation] When the input formula cannot fit within the line, the wrap position is determined based on the above wrap condition. Furthermore, an alignment position corresponding to the determined folding position can also be determined based on the alignment condition.

Then, when the folding position is determined at the folding position and the alignment position is determined, the folding position is aligned with the alignment position.

This allows wrapping and even alignment of formulas.
Since this can be done automatically, the formulas can be arranged in an easy-to-read manner to make them easy to understand.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 6 is a block diagram showing the configuration of a document input/editing device according to an embodiment of the present invention.

In FIG. 6, 601 is a CPU, 602 is a pass line, 603 is an input device, 604 is an output device, 605 is a storage device, 606 is a processing program memory, 607 is a register group and work memory, and 608 is a priority order/alignment. The position table 609 is a binary relationship/binary operator table.

The CPU 601 transfers data between each block via a pass line 602 and operates a processing program stored in a processing program memory 606 in a storage device 605.

The input device 603 is, for example, a keyboard or a mouse, and is used to input mathematical formulas, other characters, memories, etc.
A group of registers in 605 and information temporarily stored in work memory 607 and an external storage device (not shown).
It also inputs information read from the .

The output device E604 is, for example, a CRT or a printer, and outputs one image according to the information created by the processing program.
Output characters, symbols, etc. Further, the output device 604 may have a storage means such as a page memory, if necessary.

The storage device 605 includes a processing program memory 606, a register group and work memory 607, a priority/alignment position table 608, and a binary relationship/binary operator table 609.
have.

The register group and work memory 607 is a register group and work memory for storing information that needs to be temporarily stored during processing, and includes display memory, page memory, etc. necessary for output. may be included here.

The priority/alignment position table 608 will be explained later.
This is a table that stores information on turnback position candidates, their priorities, and alignment positions.

The binary relationship/binary operator table 609 is a table that stores symbols that describe binary relationships and symbols that describe binary operators.

The document input/editing device of this embodiment has a formula editing mode in which formulas are input and edited, and when the start of the formula editing mode is specified and the formula editing mode is entered, the following mathematical formulas are input and edited. Performs loopback processing.

Note that the start and end of the formula editing mode can be specified, for example, by pressing a key representing the start and end of the mode, or by inputting a control code representing the start and end of the mode. In this embodiment, the start of the formula editing mode is specified by inputting a control code indicating the start of formula input, and the end of the formula editing mode is specified by inputting a control code indicating the end of formula input. It is specified by.

FIG. 1 is a flowchart of the formula folding process of this embodiment.

In step 101, processing begins, and in step 102,
Characters, symbols, etc. are input from the input device 603.

In step 103, it is determined whether the input characters, symbols, etc. are control codes indicating the end of inputting the mathematical formula. If it is a control code indicating the end of formula input, step 10
At step 8, the process ends.

If it is not a control code indicating the end of inputting a mathematical formula, in step 104, the length of the mathematical formula when the characters and symbols input in step 101 are reassembled into a mathematical formula is checked, and the length of the mathematical formula is determined by the line length. If it is determined that the number exceeds 1, the return position is determined in step 105 by referring to the information in the priority order/alignment position table 608 and the binary relation/binary operator table 609.

If it is determined in step 104 that the length of the mathematical expression is less than the line length, or after the wrapping position is determined in step 105, in step 106 the positions of all characters, symbols, etc. that make up the mathematical expression are re-positioned. It is calculated and outputted to the output device 604 in step 107. Then step 102 again
Go back and repeat this below.

FIG. 2 is an explanatory diagram showing the structure of the priority order/alignment position table 608.

In FIG. 2, a priority/alignment position table 608 stores candidates for folding positions and their priorities in comparison with alignment positions when folding is performed at those locations.

In this embodiment, for example, the wrap-around position candidate with the first priority is "before the symbol that describes the binary relationship from the second onwards from the beginning", and the alignment position for this is:
"Align to the symbol that describes the first binary relationship from the beginning"
It is said that

In step 105 of FIG. 1, the priority/alignment position table 608 is referred to, and among the formulas whose length is shorter than the line length and which has the highest priority, the formula whose length is the longest is selected. A turnaround position candidate that satisfies the following is determined as the turnback position.

In the priority order/alignment position table 608, it is difficult to know what kind of symbols the "symbols describing binary relationships,""addition/subtraction symbols or similar symbols," and "multiplication/division symbols or similar symbols" actually represent. , the determination is made with reference to the binary relation/binary operator table 609.

FIG. 3 is an explanatory diagram showing the structure of the binary relation/binary operator table 609.

In FIG. 3, a binary relation/binary operator table 609
stores symbols representing binary relationships, addition/subtraction symbols or symbols similar to these symbols, and multiplication/division symbols or symbols similar to these symbols, classified into different types.

FIG. 4 shows an example in which foldback processing is performed using the priority/alignment position table 608 and the binary relationship/binary operator table 609 in accordance with the flowchart shown in FIG.

Figure 4(a) shows the formula F(αβγ)=(α+β+γ
) 2 is shown.

In this state, the length of the formula is less than the line length, so the check results in step 104 are all No, and the processes in steps 102 to 104, step 106, and step 107 are repeated.

As in this example, if the length of the formula is less than the line length, in this example the formula is centered,
With leading and trailing margins, the values of the leading margin and trailing margin are equal.

The 41st (b) shows a state in which "=α2+β2+γ" is further input from the 41st (a) state.

In this state, the length of the formula exceeds the line length. Therefore, the check result in step 104 is YES, and the process in step 105 is performed.

In step 105, from "r" input so far to "
For each of up to γJ, refer to the priority order/alignment position table 608 and the binary relation/binary operator table 609, and select the formula whose length is shorter than the line length and which has the highest priority. Select the one with the longest formula length.

Determine as the turnaround position.

In this example, the return position is the "=" shown at 401 in FIG. 4(C), which corresponds to the return position candidate with the first priority.
, and its alignment position is "the symbol that describes the first binary relationship from the beginning ("=" shown at 402 in FIG. 4(c)).
"Align it to ."

Therefore, in step 106, all characters and symbols are , etc., and outputs the result to the output device 604 in step 107. This state is the fourth
It is figure (c).

FIG. 5 shows another example in which the folding process is performed in accordance with the flowchart shown in FIG. 1 using the priority order/alignment position table 608 and the binary relationship/binary operator table 609.

Figure 5(a) shows the mathematical formula ``Δ(αβγ)=[((α+
The state in which input has been made up to β)2+(α−β)”)”+((α+γ)2+α−) is shown.

When the second to last "α" is input, the length of the formula is less than the line length, so the check results at step 104 are all No, and steps 102 to 104, step 106, and step Repeat the process in step 107.

At this time, similar to the example of FIG. 4(a), the formula is centered in the center and has front and rear margins.

If you enter up to "-", the length of the formula will exceed the line length. Therefore, the check result in step 104 is YES,
The process of step 105 is performed.

In step 105, the steps are performed from ``rΔ'' input so far to ``
-'', the priority order/alignment position table 608 and the binary relation/binary operator table 609 are referred to, and the formula length is shorter than the line length and the priority order is highest. , the one with the longest formula is selected and determined as the looping position.

In this example, the turnaround position is "+" shown at 501 in FIG. 5(a), which corresponds to the turnaround position candidate with the second priority.
Since the symbol describing the binary relationship (";" shown at 502 in FIG. 5(b)) has already appeared, the alignment position is "the symbol describing the immediately preceding binary relationship (5 "Align to a position that is indented by A from the "=" shown at 502 in FIG.

Therefore, in step 106, all the characters and symbols are , etc., and outputs the result to the output device 604 in step 107. This state is the fifth
It is figure (b).

In this embodiment, in FIG. 2, the priority positions 1 to 4 of the priority/alignment position table 608 are described, but the subsequent priority positions are 1, for example, the 5th priority position. , before the addition/subtraction symbol in the second position nested in parentheses or a symbol similar to this symbol, and as the sixth priority, before the multiplication/division symbol in the second position nested in parentheses or a symbol similar to this symbol, and as follows: , Similarly, repeat the 1 before the multiplication/division symbol or the symbol similar to this symbol in order of the order of nesting of parentheses from high to low,
In other positions, it may not be possible to turn back.

Additionally, the priority order can be changed by the user. Also, the indentation amounts A and B that appear in the alignment position
, C, etc. can also be changed by the user.

For example, wrapping at the ``symbol that describes the second binary relationship from the beginning'' which has the first priority.

This is usually done first, and the alignment position "align to the symbol that describes the first binary relationship from the beginning" is also a general matter, so it is like this.

For items that it is preferable not to allow users to change,
Both priority and alignment, or.

Only one of them may be unchangeable.

Also, for example, if the symbol that describes the first binary relationship is long to some extent even if it does not exceed the line length, when the symbol that describes the binary relationship is determined as the wrapping position, the Since it becomes easier to see if the data is aligned at a position that is indented by D (<O) from the beginning, it is also possible to set the contents of the priority order/alignment position table 608 so as to do so.

[Effects of the Invention] As explained above, according to the present invention, formulas can be automatically folded back, so even non-experts can input formulas relatively easily.

Further, according to the present invention, since the folding and alignment of mathematical expressions can be performed automatically, there is an advantage that even non-experts can input mathematical expressions relatively easily.

[Brief explanation of the drawing]

Fig. 1 is a flowchart of the formula wrapping process of this embodiment, Fig. 2 is an explanatory diagram showing the configuration of the priority order/alignment position table, and Fig. 3 is an explanatory diagram showing the configuration of the binary relation/binary operator table. 4 and 5 are explanatory diagrams showing specific examples of the formula folding process of this embodiment, and FIG. 6 is a block diagram showing the configuration of the document input and editing apparatus of this embodiment. 601...CPU, 602...Pass line, 603
...Input device, 604...Output device, 605...
Storage device, 606... Processing program memory, 6o7
. . . register group and work memory, 608 . . . priority order/alignment position table, 609 . . . binary relation/binary operator table. Figure 1

Claims (1)

[Scope of Claims] 1. A document input/editing device that inputs and edits a character string group including a mathematical formula and outputs an editing result, comprising a folding condition storage means for storing a predetermined folding condition, and inputting a mathematical formula. wrapping means that determines a wrapping position based on the wrapping condition stored in the wrapping condition storage means and wraps the item at the wrapping position when the input formula exceeds the line length when editing the input formula. A document input/editing device characterized by being provided with. 2. Alignment condition storage means for storing predetermined alignment conditions; and alignment means for determining an alignment position based on the alignment conditions stored in the alignment condition storage means and aligning the folding position to the alignment position. 2. The document input/editing device according to claim 1, further comprising: a document input/editing device; 3. An input device for inputting a group of character strings including mathematical formulas and various instructions, a storage device for storing the input group of character strings, a processing device for performing document editing processing according to the input instructions, and outputting the processing results. In the document input/editing device including an output device, the storage device has a folding condition storage unit that stores predetermined folding conditions, and the processing device is configured to input a mathematical formula inputted from the input device according to a line length. If it exceeds
A document input/editing device comprising: a folding unit that determines a folding position based on folding conditions stored in the folding condition storage unit, and folds the fold at the folding position. 4. The storage device has an alignment condition storage section that stores predetermined alignment conditions, and the processing device determines alignment positions based on the alignment conditions stored in the alignment condition storage section; 4. The document input/editing device according to claim 3, further comprising an alignment section for aligning the folding position to the alignment position. 5. The above wrapping condition sets at least the position before the symbol that describes the binary relationship or the position before the binary operator as the wrapping position, and each wrapping position is given a priority. A document input/editing device according to claim 1, 2, 3, or 4. 6. The document input/editing device according to claim 5, wherein the priority given to the return position can be changed arbitrarily. 7. The above alignment condition requires that at least the alignment position is a position determined based on a symbol describing a binary relationship and a binary operator, and that each alignment position corresponds to the above wrapping position. 6. A document input/editing device according to claim 2, characterized in that: