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From Lei Wang <lei.wang.l...@gmail.com>
Subject [Calc][DISCUSS] What is your expected behavior when doing paste with a whole column or a whole sheet.
Date Tue, 12 Jun 2012 08:49:11 GMT
Hi,

When I review bug i118863 (
https://issues.apache.org/ooo/show_bug.cgi?id=118863), I find there are
some other related user cases which can get AOO crash or freeze.

Scenario 1
1)New a calc doc.
2)Input 1, 2, 3 in cell A1, A2, A3
3)Set background color for cell A1, A2, A3 as blue, green, red
4)Select A1:A3, and copy
5)Select a whole columnm, such as column E, and paste

AOO need more than 5 minutes to complete this work.
6)undo the paste
AOO also need a lot of time

Scenario 2
1)New a calc doc.
2)Input 1, 2, 3 in cell A1, A2, A3
3)Select A1:A3, and copy
4)Select another whole sheet, such as "sheet2", and paste

AOO will crash


Now Calc supoorts 1,048,576 rows * 1024 columns, which is 1,073,741,824
cells. Pasting with a whole column selected will fill the column. Pasting
with a whole sheet selected will fill the sheet, which always casue AOO
crash.

I have two suggestions

Solution 1
Disable auto repeat to fill cells when pasting with a whole column/sheet
selected. Considering user may not want to repeat to fill the cells when
pasting with a whole column/sheet selected, just paste the source data and
do not repeat to fill.

Excel has a strange behavior. It will not repeat to fill cells, if the cell
numbers in target range is not integer multiple of the source data.
For an example,
Copy A1:A2, Select B1:B10, Ctrl+V -> B1:B10 will be filled
Copy A1:A2, Select B1:B11, Ctrl+V -> Only B1:B2 will be filled
So when pasting with a whole column/sheet selected, sometimes Excel will
repeat to fill the whole column/sheet, sometimes it will not.


Solution 2
Set two thresholds, one is for warning user, one is for the limitation.
If number of cells in target range is bigger than warning threshold, Calc
will popup a warning message to warn user the potential bad performance. If
number of cells in target range is bigger than limitation, Calc will popup
a error message to info user the operation can not be completed.

The purpose of Solution 1/Solution 2 is to avoid making Calc crash for
careless operation(paste with a whole column/sheet selected).

 What is your opinion?

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