src/ui/widget/style-subject.cpp

   1 /**
   2  * \brief Abstraction for different style widget operands
   3  *
   4  * Copyright (C) 2007 MenTaLguY <mental@rydia.net>
   5  *   Abhishek Sharma
   6  *
   7  * Released under GNU GPL.  Read the file 'COPYING' for more information.
   8  */
   9
  10 #include "ui/widget/style-subject.h"
  11
  12 #include "desktop.h"
  13 #include "sp-object.h"
  14 #include "xml/sp-css-attr.h"
  15 #include "desktop-style.h"
  16 #include "desktop-handles.h"
  17 #include "selection.h"
  18 #include "style.h"
  19
  20 namespace Inkscape {
  21 namespace UI {
  22 namespace Widget {
  23
  24 StyleSubject::StyleSubject() : _desktop(NULL) {
  25 }
  26
  27 StyleSubject::~StyleSubject() {
  28     setDesktop(NULL);
  29 }
  30
  31 void StyleSubject::setDesktop(SPDesktop *desktop) {
  32     if (desktop != _desktop) {
  33         if (desktop) {
  34             GC::anchor(desktop);
  35         }
  36         if (_desktop) {
  37             GC::release(_desktop);
  38         }
  39         _desktop = desktop;
  40         _afterDesktopSwitch(desktop);
  41         _emitChanged();
  42     }
  43 }
  44
  45 StyleSubject::Selection::Selection() {
  46 }
  47
  48 StyleSubject::Selection::~Selection() {
  49 }
  50
  51 Inkscape::Selection *StyleSubject::Selection::_getSelection() const {
  52     SPDesktop *desktop = getDesktop();
  53     if (desktop) {
  54         return sp_desktop_selection(desktop);
  55     } else {
  56         return NULL;
  57     }
  58 }
  59
  60 StyleSubject::iterator StyleSubject::Selection::begin() {
  61     Inkscape::Selection *selection = _getSelection();
  62     if (selection) {
  63         return iterator(selection->list());
  64     } else {
  65         return iterator(NULL);
  66     }
  67 }
  68
  69 Geom::OptRect StyleSubject::Selection::getBounds(SPItem::BBoxType type) {
  70     Inkscape::Selection *selection = _getSelection();
  71     if (selection) {
  72         return selection->bounds(type);
  73     } else {
  74         return Geom::OptRect();
  75     }
  76 }
  77
  78 int StyleSubject::Selection::queryStyle(SPStyle *query, int property) {
  79     SPDesktop *desktop = getDesktop();
  80     if (desktop) {
  81         return sp_desktop_query_style(desktop, query, property);
  82     } else {
  83         return QUERY_STYLE_NOTHING;
  84     }
  85 }
  86
  87 void StyleSubject::Selection::_afterDesktopSwitch(SPDesktop *desktop) {
  88     _sel_changed.disconnect();
  89     _subsel_changed.disconnect();
  90     _sel_modified.disconnect();
  91     if (desktop) {
  92         _subsel_changed = desktop->connectToolSubselectionChanged(sigc::hide(sigc::mem_fun(*this, &Selection::_emitChanged)));
  93         Inkscape::Selection *selection = sp_desktop_selection(desktop);
  94         if (selection) {
  95             _sel_changed = selection->connectChanged(sigc::hide(sigc::mem_fun(*this, &Selection::_emitChanged)));
  96             _sel_modified = selection->connectModified(sigc::hide(sigc::hide(sigc::mem_fun(*this, &Selection::_emitChanged))));
  97         }
  98     }
  99 }
 100
 101 void StyleSubject::Selection::setCSS(SPCSSAttr *css) {
 102     SPDesktop *desktop = getDesktop();
 103     if (desktop) {
 104         sp_desktop_set_style(desktop, css);
 105     }
 106 }
 107
 108 StyleSubject::CurrentLayer::CurrentLayer() {
 109     _element.data = NULL;
 110     _element.next = NULL;
 111 }
 112
 113 StyleSubject::CurrentLayer::~CurrentLayer() {
 114 }
 115
 116 void StyleSubject::CurrentLayer::_setLayer(SPObject *layer) {
 117     _layer_release.disconnect();
 118     _layer_modified.disconnect();
 119     if (_element.data) {
 120         sp_object_unref(static_cast<SPObject *>(_element.data), NULL);
 121     }
 122     _element.data = layer;
 123     if (layer) {
 124         sp_object_ref(layer, NULL);
 125         _layer_release = layer->connectRelease(sigc::hide(sigc::bind(sigc::mem_fun(*this, &CurrentLayer::_setLayer), (SPObject *)NULL)));
 126         _layer_modified = layer->connectModified(sigc::hide(sigc::hide(sigc::mem_fun(*this, &CurrentLayer::_emitChanged))));
 127     }
 128     _emitChanged();
 129 }
 130
 131 SPObject *StyleSubject::CurrentLayer::_getLayer() const {
 132     return static_cast<SPObject *>(_element.data);
 133 }
 134
 135 GSList *StyleSubject::CurrentLayer::_getLayerSList() const {
 136     if (_element.data) {
 137         return &_element;
 138     } else {
 139         return NULL;
 140     }
 141 }
 142
 143 StyleSubject::iterator StyleSubject::CurrentLayer::begin() {
 144     return iterator(_getLayerSList());
 145 }
 146
 147 Geom::OptRect StyleSubject::CurrentLayer::getBounds(SPItem::BBoxType type) {
 148     SPObject *layer = _getLayer();
 149     if (layer && SP_IS_ITEM(layer)) {
 150         return SP_ITEM(layer)->getBboxDesktop(type);
 151     } else {
 152         return Geom::OptRect();
 153     }
 154 }
 155
 156 int StyleSubject::CurrentLayer::queryStyle(SPStyle *query, int property) {
 157     GSList *list = _getLayerSList();
 158     if (list) {
 159         return sp_desktop_query_style_from_list(list, query, property);
 160     } else {
 161         return QUERY_STYLE_NOTHING;
 162     }
 163 }
 164
 165 void StyleSubject::CurrentLayer::setCSS(SPCSSAttr *css) {
 166     SPObject *layer = _getLayer();
 167     if (layer) {
 168         sp_desktop_apply_css_recursive(layer, css, true);
 169     }
 170 }
 171
 172 void StyleSubject::CurrentLayer::_afterDesktopSwitch(SPDesktop *desktop) {
 173     _layer_switched.disconnect();
 174     if (desktop) {
 175         _layer_switched = desktop->connectCurrentLayerChanged(sigc::mem_fun(*this, &CurrentLayer::_setLayer));
 176         _setLayer(desktop->currentLayer());
 177     } else {
 178         _setLayer(NULL);
 179     }
 180 }
 181
 182 }
 183 }
 184 }
 185
 186 /*
 187   Local Variables:
 188   mode:c++
 189   c-file-style:"stroustrup"
 190   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 191   indent-tabs-mode:nil
 192   fill-column:99
 193   End:
 194 */
 195 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :