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Description  |
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BACKGROUND OF THE INVENTION
The present invention relates to an improved word processor, and more
particularly to a word processor having the various functions as will be
described.
Some types of word processors are capable of changing a format code during
inputting of a certain text. The format code means information relating to
formatting of the number of characters to be inputted in one line, each
position of a left and right margin, positions of tabulation, a character
pitch and the like.
Once a desired format code is set, the text inputted is formatted by the
format code until the next format code is reset. Further, in editing the
text inputted, the text is divided at positions where desired format code
is set, and each divided text section is formatted by each format code.
In one kind of such a word processor, the information relating to the
format code is not displayed on a display. However, this type of word
processor is inconvenient to use when the format code is intended to be
changed during editing of the text.
In another type of word processor, the information relating to the format
code is indicated at a cursor position where the format code is set. That
is, the format code is indicated in the text area. However, this type of
word processor is troublesome when an operator intends to find the format
code. Further, as the format code is not printed, the indicated condition
of characters on the display does not accord with the printout condition
of the characters.
In changing the format code, the format code is reset after the cursor is
moved to a position of the format code to be changed. However, the
operator does not always remember the position of the format code.
Especially, in the case that the text is too long, and the full text
cannot be displayed on the display at a stroke, the operator experiences
difficulty in finding the format code.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a word
processor which enables an operator to easily find a format code.
It is another object of the present invention to provide a word processor
which enables the operator to efficiently change the format code.
According to the present invention, the display is divided into a format
code display area and a text display area. In a text creating mode, a
cursor is normally moved from a left margin to a right margin on the text
display area at the same time when characters are inputted, and when the
cursor reaches the right margin or a return key is depressed, the cursor
is moved to the next line. In changing a format of the text to be
subsequently inputted, a format setting key is depressed to select a
format setting mode. At this time, the cursor is moved to the format code
display area separated from the text display area. Then, the format code
setting key is depressed to reset a new format code. After resetting the
format code, a text creating mode selecting key is depressed to select the
text creating mode again. At the same time, the cursor is moved to a head
position in a text area to be formatted by the reset format code.
In editing a text having been inputted, the format code can be changed
according to the present invention. First, the cursor is moved to a text
area intended to be changed in format, and then the format setting key is
depressed. As a result, the cursor is moved to a position where the format
code is indicated in the format display area. If the format code is not
indicated on the display, the display is vertically scrolled to make the
format code appear on the display. Then, the format setting key is
depressed to reset a new format code. After resetting the new format code,
the text creating mode selecting key is depressed to select a text editing
mode. Thus, the text area to be edited is reformatted by the reset format
code, and is displayed on the display.
The invention will be more fully understood from the following detailed
description and appended claims when taken with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the word processor of a preferred
embodiment according to the present invention;
FIG. 2 is a plan view of the keyboard of the word processor shown in FIG.
1;
FIG. 3 is a block diagram of an electrical circuit in the word processor;
FIG. 4 is an overall flow chart of format code processing;
FIG. 5 is a subroutine for format code search processing;
FIG. 6 is a subroutine for a line format code reverse search; and
FIG. 7 is a plan view of a picture on the display.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to FIG. 1 which shows a perspective view of a word processor
1. The word processor 1 includes a keyboard 2 to be operated for setting
various modes and inputting various characters, a display 3 having a CRT
for suitably displaying characters, symbols and the like inputted by the
keyboard 2 and stored in a memory of the word processor 1, and a printer 4
for printing out the characters and the like stored in the memory of the
word processor 1.
FIG. 2 shows a plan view of the keyboard 2, and FIG. 3 shows a block
diagram of an electrical circuit in the word processor 1. Referring to
FIGS. 2 and 3, the keyboard 2 includes various function keys 2A and
various character keys 2B as suitably arranged. The function keys 2A are
connected to a function key input section 11, and the character keys 2B
are connected to a character key input section 12. Thus, the function key
input section 11 and the character key input section 12 serve as
respective interfaces between the function keys 2A and a host CPU (central
processing unit) 13 and between the character keys 2B and the host CPU 13.
The host CPU 13 is connected through a bus line BUS1 to a read-only memory
(ROM) 14 and a random access memory (RAM) 15.
ROM 14 stores a total control program for the word processor 1, and RAM 15
stores function data and character data upon operating the keyboard 2, for
example.
The host CPU 13 is connected through an interface circuit 16 to CRTCPU 17
for controlling the display 3. The CRTCPU 17 is connected through a bus
line BUS2 to ROM 18 and RAM 19, and also to CRT controller 20. ROM 18
stores a control program for controlling the CRT, and RAM 19 temporarily
stores various data upon controlling the CRT. The CRT controller 20 is
connected at its output to a character random access memory (CRAM) 21 for
storing character data and an attribute random access memory (ARAM) 22 for
storing attribute data such as data of underline, bold and so on. A signal
synthesizer circuit 24 is provided to synthesize the data read from CRAM
21 and ARAM 22 and the data read from a character generator read-only
memory (CGROM) 23 according to an output command from the CRT controller
20, and output a display data to the display 3.
In the case of editing a text stored in the memory of the word processor 1,
a file storing the text is specified by the keyboard 2 and is transferred
by the host CPU 13 from a text memory in RAM 15 through the interface
circuit 16 to CRTCPU 17, and is stored in a text memory in RAM 19. Then,
CRTCPU 17 operates to edit the text memory in RAM 19 according to key data
fed from the host CPU 13. At the same time, display data is rewritten in
CRAM 21 and ARAM 22 so as to display the edited text on the display 3.
Further, when an edit end key 29 is depressed, CRTCPU 17 transfers the
content of the text memory in RAM 19 to the host CPU 13, and the host CPU
13 then stores the content in the text memory in RAM 15.
FIGS. 4 to 6 show a flow chart of format code search processing in the word
processor 1 of the present invention.
Referring first to FIG. 4, format data and text data stored in RAM 19 are
displayed on the display 3 at the beginning of this program. In step S1,
key scanning is carried out. In step S2, it is determined whether or not
key input is carried out. If NO in step S2, the key scanning continues to
be executed until any key is depressed. In step S3, it is determined
whether or not margin release key input is carried out. In step S4, it is
determined whether or not margin release is in effect. If NO in step S4,
any keys other than a margin release key 30 are processed in step S5. If
YES in step S3, a margin release mode is set in step S6. Then, the program
proceeds to step S7, where a subroutine for format code search processing
is executed as shown in FIG. 5.
Referring o FIG. 5, the program proceeds to step S8, where a cursor current
address on the text memory in RAM 19 is stored in a search address
register SA in RAM 19. In step S9, 1 is subtracted from SA, and the
difference is again stored into SA. Then, in step S10, a memory content
addressed by SA is read. In step S11, it is determined whether or not the
content is a format code LF. If YES in step S11, the program proceeds to
step S12, where a memory address in RAM 19 corresponding to a head
position on a head line currently displayed on the display 3 is written in
a text address register TA provided in RAM 19. If NO in step S11, it is
determined in step S13 whether or not the content is a carrier return code
CR. If NO in step S13, the program returns to step S9 and continues to
search the line format code LF. If YES in step S13, the program proceeds
to step S14, where 1 is added to SA, and the sum is again stored in SA.
Then, the program proceeds to step S12, where the memory address in RAM 19
corresponding to the head position on the head line currently displayed on
the display 3 is written in TA. Then, in step S15, it is determined
whether or not SA < TA is held. If YES in step S15, display scroll is
required in step S16. If NO in step S15, the program returns to the main
routine.
Referring back to FIG. 4, if the answer in step S3 is NO, and the answer in
step S4 is YES, the program proceeds to step S17, where it is determined
whether or not an upward moving key 31 is depressed. If YES in step S17,
the program proceeds to step S7, where the LF search process is executed
in the same manner as above mentioned. If NO in step S17, the program
proceeds to step S18, where it is determined whether or not a downward
moving key 32 is depressed. If YES in step S18, the program proceeds to
step S19, where a LF reverse step is executed as shown in FIG. 6.
Referring to FIG. 6 which shows a subroutine of the LF reverse search, the
program proceeds to step S20, where a cursor current address on the text
memory in RAM 19 is stored in SA. Then, in step S21, 1 is added to SA, and
the sum is again stored in SA. In step S22, a memory content addressed by
SA is read. Then, in step S23, it is determined whether or not the memory
content is a format code LF. If YES in step S23, the program proceeds to
step S24, where a memory address in RAM 19 corresponding to the head
position on the line next to a final line currently displayed on the
display 3 is written in TA. If NO in step S23, the program proceeds to
step S25, where it is determined whether or not the memory content is a
carrier return code CR. If NO in step S25, the program returns to step
S21, and continues to search the format code LF. If YES in step S25, the
program proceeds to step S26, where 1 is subtracted from SA, and the
difference is again stored in SA. Then, in step 24, the memory address in
RAM 19 corresponding to the head position on the line next to the final
line currently displayed on the display 3 is written in TA. Then, the
program proceeds to step S27, where it is determined whether or not
SA.gtoreq.TA is held. If YES in step S27, namely, the searched format code
is not indicated on the display 3 or it is indicated on the last line
currently displayed, display scroll is required in step S28. If NO in step
S27, the program returns to the main routine.
Referring back to FIG. 4, after executing the LF search in step S7 and the
LF reverse search in step S19, the program proceeds to step S29, where it
is determined whether or not display scroll is required. If YES in step
S29, the program proceeds to step S30, where vertical and horizontal
scroll are carried out to locate a mark F of the format code LF searched
in step S7 or S19 to a position of 0 line and 0 column on the display 3.
The format information set by the mark F is indicated at the top area of
the display image on the display 3. When the format code searched in step
S7 or S19 is not indicated on the display 3 or it is indicated on the last
line on the display 3, the display scroll is carried out to indicate the
searched format code at the left upper position of the display. Then, in
step S31, a cursor K is moved to a column where the mark F is indicated.
Under the condition, the format code can be reset, which will be
hereinafter executed in step S35. If NO in step S29, the program jumps to
step S31, where the cursor K is moved to a column where the mark F is
indicated. Then, the program returns to step S1. In this case, as the
searched format code has been already indicated within a format code area
on the display, the display scroll is not carried out, and the format code
may be reset.
If NO in step S18, the program proceeds to step S32, where it is determined
whether or not a rightward moving key 33 is depressed. If YES in step S32,
the program proceeds to step S33, where the cursor K is moved to a left
margin on a line where the mark F is indicated. Then, in step S34, the
margin release mode is released, and the program returns to step S1. As a
result, the cursor is moved to the head position in the text display area
defined by the reset format code. On the other hand, if NO in step S32,
the program proceeds to step S35, where the process for the key depressed
in step S2 is executed.
In changing the format code during editing of the text, the cursor is moved
to a position in the text area to be reformatted, and then the margin
release key is depressed to search the format code in steps S6 and S7. If
the searched format code is indicated in the format code display area on
the display, the cursor is moved to the position where the format code is
indicated. As shown in FIG. 7, the cursor is moved to a F position defined
by a solid line. If the searched format code is not indicated, or it is
indicated at the bottom position of the display, the display is vertically
scrolled to locate the searched format code to a top left position of the
display and also move the cursor to this position. As shown in FIG. 7, the
cursor is moved to a F position shown by an alternate long and short
dashes line, and is indicated at this position.
If the margin release key is depressed at an erroneous position, the upward
moving key 31 or the downward moving key 32 is depressed to search the
format code. Then, as similar to the above, if the searched format code is
indicated in the format code display area on the display, the cursor only
is moved to the position where the format code is indicated (at the F
position shown by an alternate long and two short dashes line in FIG. 7).
If the searched format code is not indicated in the specified area, the
format code and the cursor are moved to the top left position on the
display (at the F position shown by the alternate long and short dashes
line in FIG. 7). Thus, the operator can easily find and search the desired
format code, and if the margin release key is depressed at an erroneous
position by the operator, the format code can be easily found.
Having thus described the preferred embodiment of the invention, it should
be understood that numerous structural modifications and adaptations may
be made without departing from the spirit of the invention.
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