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