src/apps/icon-o-matic/style/AddStylesCommand.cpp

   1 /*
   2  * Copyright 2006, Haiku.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Stephan Aßmus <superstippi@gmx.de>
   7  */
   8
   9 #include "AddStylesCommand.h"
  10
  11 #include <new>
  12 #include <stdio.h>
  13 #include <string.h>
  14
  15 #include <Catalog.h>
  16 #include <Locale.h>
  17
  18 #include "StyleContainer.h"
  19 #include "Style.h"
  20
  21
  22 #undef B_TRANSLATION_CONTEXT
  23 #define B_TRANSLATION_CONTEXT "Icon-O-Matic-AddStylesCmd"
  24
  25
  26 using std::nothrow;
  27
  28 // constructor
  29 AddStylesCommand::AddStylesCommand(StyleContainer* container,
  30                                                                    Style** const styles,
  31                                                                    int32 count,
  32                                                                    int32 index)
  33         : Command(),
  34           fContainer(container),
  35           fStyles(styles && count > 0 ? new (nothrow) Style*[count] : NULL),
  36           fCount(count),
  37           fIndex(index),
  38           fStylesAdded(false)
  39 {
  40         if (!fContainer || !fStyles)
  41                 return;
  42
  43         memcpy(fStyles, styles, sizeof(Style*) * fCount);
  44 }
  45
  46 // destructor
  47 AddStylesCommand::~AddStylesCommand()
  48 {
  49         if (!fStylesAdded && fStyles) {
  50                 for (int32 i = 0; i < fCount; i++)
  51                         fStyles[i]->ReleaseReference();
  52         }
  53         delete[] fStyles;
  54 }
  55
  56 // InitCheck
  57 status_t
  58 AddStylesCommand::InitCheck()
  59 {
  60         return fContainer && fStyles ? B_OK : B_NO_INIT;
  61 }
  62
  63 // Perform
  64 status_t
  65 AddStylesCommand::Perform()
  66 {
  67         status_t ret = B_OK;
  68
  69         // add shapes to container
  70         int32 index = fIndex;
  71         for (int32 i = 0; i < fCount; i++) {
  72                 if (fStyles[i] && !fContainer->AddStyle(fStyles[i], index)) {
  73                         ret = B_ERROR;
  74                         // roll back
  75                         for (int32 j = i - 1; j >= 0; j--)
  76                                 fContainer->RemoveStyle(fStyles[j]);
  77                         break;
  78                 }
  79                 index++;
  80         }
  81         fStylesAdded = true;
  82
  83         return ret;
  84 }
  85
  86 // Undo
  87 status_t
  88 AddStylesCommand::Undo()
  89 {
  90         // remove shapes from container
  91         for (int32 i = 0; i < fCount; i++) {
  92                 fContainer->RemoveStyle(fStyles[i]);
  93         }
  94         fStylesAdded = false;
  95
  96         return B_OK;
  97 }
  98
  99 // GetName
 100 void
 101 AddStylesCommand::GetName(BString& name)
 102 {
 103         if (fCount > 1)
 104                 name << B_TRANSLATE("Add Styles");
 105         else
 106                 name << B_TRANSLATE("Add Style");
 107 }