Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1125 insertions, 0 deletions

diff --git a/src/object/sp-namedview.cpp b/src/object/sp-namedview.cpp
new file mode 100644
index 0000000..0fc6339
--- /dev/null
+++ b/src/object/sp-namedview.cpp
@@ -0,0 +1,1125 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * <sodipodi:namedview> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
+ * Copyright (C) 1999-2013 Authors
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "sp-namedview.h"
+
+#include <cstring>
+#include <string>
+
+#include <2geom/transforms.h>
+
+#include <gtkmm/window.h>
+
+#include "attributes.h"
+#include "conn-avoid-ref.h" // for defaultConnSpacing.
+#include "desktop-events.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "enums.h"
+#include "event-log.h"
+#include "layer-manager.h"
+#include "page-manager.h"
+#include "preferences.h"
+#include "sp-guide.h"
+#include "sp-page.h"
+#include "sp-item-group.h"
+#include "sp-root.h"
+
+#include "actions/actions-canvas-snapping.h"
+#include "display/control/canvas-grid.h"
+#include "display/control/canvas-page.h"
+#include "svg/svg-color.h"
+#include "ui/monitor.h"
+#include "ui/widget/canvas.h"
+#include "util/units.h"
+#include "xml/repr.h"
+
+using Inkscape::DocumentUndo;
+using Inkscape::Util::unit_table;
+
+#define DEFAULTGRIDCOLOR 0x3f3fff25
+#define DEFAULTGRIDEMPCOLOR 0x3f3fff60
+#define DEFAULTGRIDEMPSPACING 5
+#define DEFAULTGUIDECOLOR   0x0086e599
+#define DEFAULTGUIDEHICOLOR 0xff00007f
+#define DEFAULTDESKCOLOR 0xd1d1d1ff
+
+SPNamedView::SPNamedView()
+    : SPObjectGroup()
+    , snap_manager(this, get_snapping_preferences())
+    , showguides(true)
+    , lockguides(false)
+    , grids_visible(false)
+    , desk_checkerboard(false)
+{
+    this->zoom = 0;
+    this->guidecolor = 0;
+    this->guidehicolor = 0;
+    this->views.clear();
+    // this->page_size_units = nullptr;
+    this->window_x = 0;
+    this->cy = 0;
+    this->window_y = 0;
+    this->display_units = nullptr;
+    // this->page_size_units = nullptr;
+    this->cx = 0;
+    this->rotation = 0;
+    this->window_width = 0;
+    this->window_height = 0;
+    this->window_maximized = 0;
+    this->desk_color = DEFAULTDESKCOLOR;
+
+    this->editable = TRUE;
+    this->guides.clear();
+    this->viewcount = 0;
+    this->grids.clear();
+
+    this->default_layer_id = 0;
+
+    this->connector_spacing = defaultConnSpacing;
+
+    this->_viewport = new Inkscape::CanvasPage();
+    this->_viewport->hide();
+}
+
+SPNamedView::~SPNamedView()
+{
+    delete _viewport;
+}
+
+static void sp_namedview_generate_old_grid(SPNamedView * /*nv*/, SPDocument *document, Inkscape::XML::Node *repr) {
+    bool old_grid_settings_present = false;
+
+    // set old settings
+    const char* gridspacingx    = "1px";
+    const char* gridspacingy    = "1px";
+    const char* gridoriginy     = "0px";
+    const char* gridoriginx     = "0px";
+    const char* gridempspacing  = "5";
+    const char* gridcolor       = "#3f3fff";
+    const char* gridempcolor    = "#3f3fff";
+    const char* gridopacity     = "0.15";
+    const char* gridempopacity  = "0.38";
+
+    const char* value = nullptr;
+    if ((value = repr->attribute("gridoriginx"))) {
+        gridoriginx = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridoriginy"))) {
+        gridoriginy = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridspacingx"))) {
+        gridspacingx = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridspacingy"))) {
+        gridspacingy = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridcolor"))) {
+        gridcolor = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridempcolor"))) {
+        gridempcolor = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridempspacing"))) {
+        gridempspacing = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridopacity"))) {
+        gridopacity = value;
+        old_grid_settings_present = true;
+    }
+    if ((value = repr->attribute("gridempopacity"))) {
+        gridempopacity = value;
+        old_grid_settings_present = true;
+    }
+
+    if (old_grid_settings_present) {
+        // generate new xy grid with the correct settings
+        // first create the child xml node, then hook it to repr. This order is important, to not set off listeners to repr before the new node is complete.
+
+        Inkscape::XML::Document *xml_doc = document->getReprDoc();
+        Inkscape::XML::Node *newnode = xml_doc->createElement("inkscape:grid");
+        newnode->setAttribute("id", "GridFromPre046Settings");
+        newnode->setAttribute("type", Inkscape::CanvasGrid::getSVGName(Inkscape::GRID_RECTANGULAR));
+        newnode->setAttribute("originx", gridoriginx);
+        newnode->setAttribute("originy", gridoriginy);
+        newnode->setAttribute("spacingx", gridspacingx);
+        newnode->setAttribute("spacingy", gridspacingy);
+        newnode->setAttribute("color", gridcolor);
+        newnode->setAttribute("empcolor", gridempcolor);
+        newnode->setAttribute("opacity", gridopacity);
+        newnode->setAttribute("empopacity", gridempopacity);
+        newnode->setAttribute("empspacing", gridempspacing);
+
+        repr->appendChild(newnode);
+        Inkscape::GC::release(newnode);
+
+        // remove all old settings
+        repr->removeAttribute("gridoriginx");
+        repr->removeAttribute("gridoriginy");
+        repr->removeAttribute("gridspacingx");
+        repr->removeAttribute("gridspacingy");
+        repr->removeAttribute("gridcolor");
+        repr->removeAttribute("gridempcolor");
+        repr->removeAttribute("gridopacity");
+        repr->removeAttribute("gridempopacity");
+        repr->removeAttribute("gridempspacing");
+
+//        SPDocumentUndo::done(doc, _("Create new grid from pre0.46 grid settings"), "");
+    }
+}
+
+void SPNamedView::build(SPDocument *document, Inkscape::XML::Node *repr) {
+    SPObjectGroup::build(document, repr);
+
+    this->readAttr(SPAttr::INKSCAPE_DOCUMENT_UNITS);
+    this->readAttr(SPAttr::UNITS);
+    this->readAttr(SPAttr::VIEWONLY);
+    this->readAttr(SPAttr::SHOWGUIDES);
+    this->readAttr(SPAttr::SHOWGRIDS);
+    this->readAttr(SPAttr::GRIDTOLERANCE);
+    this->readAttr(SPAttr::GUIDETOLERANCE);
+    this->readAttr(SPAttr::OBJECTTOLERANCE);
+    this->readAttr(SPAttr::ALIGNMENTTOLERANCE);
+    this->readAttr(SPAttr::DISTRIBUTIONTOLERANCE);
+    this->readAttr(SPAttr::GUIDECOLOR);
+    this->readAttr(SPAttr::GUIDEOPACITY);
+    this->readAttr(SPAttr::GUIDEHICOLOR);
+    this->readAttr(SPAttr::GUIDEHIOPACITY);
+    this->readAttr(SPAttr::SHOWBORDER);
+    this->readAttr(SPAttr::SHOWPAGESHADOW);
+    this->readAttr(SPAttr::BORDERLAYER);
+    this->readAttr(SPAttr::BORDERCOLOR);
+    this->readAttr(SPAttr::BORDEROPACITY);
+    this->readAttr(SPAttr::PAGECOLOR);
+    this->readAttr(SPAttr::INKSCAPE_PAGEOPACITY);
+    this->readAttr(SPAttr::INKSCAPE_DESK_COLOR);
+    this->readAttr(SPAttr::INKSCAPE_DESK_CHECKERBOARD);
+    this->readAttr(SPAttr::INKSCAPE_PAGESHADOW);
+    this->readAttr(SPAttr::INKSCAPE_ZOOM);
+    this->readAttr(SPAttr::INKSCAPE_ROTATION);
+    this->readAttr(SPAttr::INKSCAPE_CX);
+    this->readAttr(SPAttr::INKSCAPE_CY);
+    this->readAttr(SPAttr::INKSCAPE_WINDOW_WIDTH);
+    this->readAttr(SPAttr::INKSCAPE_WINDOW_HEIGHT);
+    this->readAttr(SPAttr::INKSCAPE_WINDOW_X);
+    this->readAttr(SPAttr::INKSCAPE_WINDOW_Y);
+    this->readAttr(SPAttr::INKSCAPE_WINDOW_MAXIMIZED);
+    this->readAttr(SPAttr::INKSCAPE_CURRENT_LAYER);
+    this->readAttr(SPAttr::INKSCAPE_CONNECTOR_SPACING);
+    this->readAttr(SPAttr::INKSCAPE_LOCKGUIDES);
+
+    /* Construct guideline and pages list */
+    for (auto &child : children) {
+        if (auto guide = dynamic_cast<SPGuide *>(&child)) {
+            this->guides.push_back(guide);
+            //g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
+            guide->setColor(this->guidecolor);
+            guide->setHiColor(this->guidehicolor);
+            guide->readAttr(SPAttr::INKSCAPE_COLOR);
+        }
+        if (auto page = dynamic_cast<SPPage *>(&child)) {
+            document->getPageManager().addPage(page);
+        }
+    }
+
+    // backwards compatibility with grid settings (pre 0.46)
+    sp_namedview_generate_old_grid(this, document, repr);
+}
+
+void SPNamedView::release() {
+    this->guides.clear();
+
+    // delete grids:
+    for(auto grid : this->grids)
+        delete grid;
+    this->grids.clear();
+    SPObjectGroup::release();
+}
+
+void SPNamedView::set_desk_color(SPDesktop* desktop) {
+    if (desktop) {
+        if (desk_checkerboard) {
+            desktop->getCanvas()->set_background_checkerboard(desk_color);
+        } else {
+            desktop->getCanvas()->set_background_color(desk_color);
+        }
+    }
+}
+
+void SPNamedView::modified(unsigned int flags)
+{
+    // Copy the page style for the default viewport attributes
+    auto &page_manager = document->getPageManager();
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        page_manager.setDefaultAttributes(_viewport);
+        updateViewPort();
+        // Pass modifications to the page manager to update the page items.
+        for (auto &page : page_manager.getPages()) {
+            page->setDefaultAttributes();
+        }
+        updateGuides();
+    }
+    // Add desk color, and chckerboard pattern to desk view
+    for (auto desktop : views) {
+        set_desk_color(desktop);
+    }
+
+    for (auto child : this->childList(false)) {
+        if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+            child->emitModified(flags & SP_OBJECT_MODIFIED_CASCADE);
+        }
+    }
+}
+
+/**
+ * Propergate the update to the child nodes so they can be updated correctly.
+ */
+void SPNamedView::update(SPCtx *ctx, guint flags)
+{
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+
+    flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+    for (auto child : this->childList(false)) {
+        if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+            child->updateDisplay(ctx, flags);
+        }
+    }
+}
+
+void SPNamedView::set(SPAttr key, const gchar* value) {
+    // Send page attributes to the page manager.
+    if (document->getPageManager().subset(key, value)) {
+        this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+        return;
+    }
+
+    switch (key) {
+    case SPAttr::VIEWONLY:
+        this->editable = (!value);
+        break;
+    case SPAttr::SHOWGUIDES:
+        this->showguides.readOrUnset(value);
+        break;
+    case SPAttr::INKSCAPE_LOCKGUIDES:
+        this->lockguides.readOrUnset(value);
+        break;
+    case SPAttr::SHOWGRIDS:
+        this->grids_visible.readOrUnset(value);
+        break;
+    case SPAttr::GRIDTOLERANCE:
+        this->snap_manager.snapprefs.setGridTolerance(value ? g_ascii_strtod(value, nullptr) : 10000);
+        break;
+    case SPAttr::GUIDETOLERANCE:
+        this->snap_manager.snapprefs.setGuideTolerance(value ? g_ascii_strtod(value, nullptr) : 20);
+        break;
+    case SPAttr::OBJECTTOLERANCE:
+        this->snap_manager.snapprefs.setObjectTolerance(value ? g_ascii_strtod(value, nullptr) : 20);
+        break;
+    case SPAttr::ALIGNMENTTOLERANCE:
+        this->snap_manager.snapprefs.setAlignementTolerance(value ? g_ascii_strtod(value, nullptr) : 5);
+        break;
+    case SPAttr::DISTRIBUTIONTOLERANCE:
+        this->snap_manager.snapprefs.setDistributionTolerance(value ? g_ascii_strtod(value, nullptr) : 5);
+        break;
+    case SPAttr::GUIDECOLOR:
+        this->guidecolor = (this->guidecolor & 0xff) | (DEFAULTGUIDECOLOR & 0xffffff00);
+        if (value) {
+            this->guidecolor = (this->guidecolor & 0xff) | sp_svg_read_color(value, this->guidecolor);
+        }
+        for(auto guide : this->guides) {
+            guide->setColor(this->guidecolor);
+            guide->readAttr(SPAttr::INKSCAPE_COLOR);
+        }
+        break;
+    case SPAttr::GUIDEOPACITY:
+        sp_ink_read_opacity(value, &this->guidecolor, DEFAULTGUIDECOLOR);
+        for (auto guide : this->guides) {
+            guide->setColor(this->guidecolor);
+            guide->readAttr(SPAttr::INKSCAPE_COLOR);
+        }
+        break;
+    case SPAttr::GUIDEHICOLOR:
+        this->guidehicolor = (this->guidehicolor & 0xff) | (DEFAULTGUIDEHICOLOR & 0xffffff00);
+        if (value) {
+            this->guidehicolor = (this->guidehicolor & 0xff) | sp_svg_read_color(value, this->guidehicolor);
+        }
+        for(auto guide : this->guides) {
+            guide->setHiColor(this->guidehicolor);
+        }
+        break;
+    case SPAttr::GUIDEHIOPACITY:
+        sp_ink_read_opacity(value, &this->guidehicolor, DEFAULTGUIDEHICOLOR);
+        for (auto guide : this->guides) {
+            guide->setHiColor(this->guidehicolor);
+        }
+        break;
+    case SPAttr::PAGECOLOR:
+        break;
+    case SPAttr::INKSCAPE_DESK_COLOR:
+        if (value) {
+            desk_color = sp_svg_read_color(value, desk_color);
+        }
+        break;
+    case SPAttr::INKSCAPE_DESK_CHECKERBOARD:
+        this->desk_checkerboard.readOrUnset(value);
+        break;
+    case SPAttr::INKSCAPE_ZOOM:
+        this->zoom = value ? g_ascii_strtod(value, nullptr) : 0; // zero means not set
+        break;
+    case SPAttr::INKSCAPE_ROTATION:
+        this->rotation = value ? g_ascii_strtod(value, nullptr) : 0; // zero means not set
+        break;
+    case SPAttr::INKSCAPE_CX:
+        this->cx = value ? g_ascii_strtod(value, nullptr) : HUGE_VAL; // HUGE_VAL means not set
+        break;
+    case SPAttr::INKSCAPE_CY:
+        this->cy = value ? g_ascii_strtod(value, nullptr) : HUGE_VAL; // HUGE_VAL means not set
+        break;
+    case SPAttr::INKSCAPE_WINDOW_WIDTH:
+        this->window_width = value? atoi(value) : -1; // -1 means not set
+        break;
+    case SPAttr::INKSCAPE_WINDOW_HEIGHT:
+        this->window_height = value ? atoi(value) : -1; // -1 means not set
+        break;
+    case SPAttr::INKSCAPE_WINDOW_X:
+        this->window_x = value ? atoi(value) : 0;
+        break;
+    case SPAttr::INKSCAPE_WINDOW_Y:
+        this->window_y = value ? atoi(value) : 0;
+        break;
+    case SPAttr::INKSCAPE_WINDOW_MAXIMIZED:
+        this->window_maximized = value ? atoi(value) : 0;
+        break;
+    case SPAttr::INKSCAPE_CURRENT_LAYER:
+        this->default_layer_id = value ? g_quark_from_string(value) : 0;
+        break;
+    case SPAttr::INKSCAPE_CONNECTOR_SPACING:
+        this->connector_spacing = value ? g_ascii_strtod(value, nullptr) : defaultConnSpacing;
+        break;
+    case SPAttr::INKSCAPE_DOCUMENT_UNITS: {
+        /* The default display unit if the document doesn't override this: e.g. for files saved as
+            * `plain SVG', or non-inkscape files, or files created by an inkscape 0.40 &
+            * earlier.
+            *
+            * Note that these units are not the same as the units used for the values in SVG!
+            *
+            * We default to `px'.
+            */
+        static Inkscape::Util::Unit const *px = unit_table.getUnit("px");
+        Inkscape::Util::Unit const *new_unit = px;
+
+        if (value) {
+            Inkscape::Util::Unit const *const req_unit = unit_table.getUnit(value);
+            if ( !unit_table.hasUnit(value) ) {
+                g_warning("Unrecognized unit `%s'", value);
+                /* fixme: Document errors should be reported in the status bar or
+                    * the like (e.g. as per
+                    * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing); g_log
+                    * should be only for programmer errors. */
+            } else if ( req_unit->isAbsolute() ) {
+                new_unit = req_unit;
+            } else {
+                g_warning("Document units must be absolute like `mm', `pt' or `px', but found `%s'", value);
+                /* fixme: Don't use g_log (see above). */
+            }
+        }
+        this->display_units = new_unit;
+        break;
+    }
+    /*
+    case SPAttr::UNITS: {
+        // Only used in "Custom size" section of Document Properties dialog
+            Inkscape::Util::Unit const *new_unit = nullptr;
+
+            if (value) {
+                Inkscape::Util::Unit const *const req_unit = unit_table.getUnit(value);
+                if ( !unit_table.hasUnit(value) ) {
+                    g_warning("Unrecognized unit `%s'", value);
+                    / * fixme: Document errors should be reported in the status bar or
+                     * the like (e.g. as per
+                     * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing); g_log
+                     * should be only for programmer errors. * /
+                } else if ( req_unit->isAbsolute() ) {
+                    new_unit = req_unit;
+                } else {
+                    g_warning("Document units must be absolute like `mm', `pt' or `px', but found `%s'",
+                              value);
+                    / * fixme: Don't use g_log (see above). * /
+                }
+            }
+            this->page_size_units = new_unit;
+            break;
+    } */
+    default:
+        SPObjectGroup::set(key, value);
+        return;
+    }
+
+    this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+}
+
+/**
+* add a grid item from SVG-repr. Check if this namedview already has a gridobject for this one! If desktop=null, add grid-canvasitem to all desktops of this namedview,
+* otherwise only add it to the specified desktop.
+*/
+static Inkscape::CanvasGrid*
+sp_namedview_add_grid(SPNamedView *nv, Inkscape::XML::Node *repr, SPDesktop *desktop) {
+    Inkscape::CanvasGrid* grid = nullptr;
+    //check if namedview already has an object for this grid
+    for(auto it : nv->grids) {
+        if (repr == it->repr) {
+            grid = it;
+            break;
+        }
+    }
+
+    if (!grid) {
+        //create grid object
+        Inkscape::GridType gridtype = Inkscape::CanvasGrid::getGridTypeFromSVGName(repr->attribute("type"));
+        if (!nv->document) {
+            g_warning("sp_namedview_add_grid - how come doc is null here?!");
+            return nullptr;
+        }
+        grid = Inkscape::CanvasGrid::NewGrid(nv, repr, nv->document, gridtype);
+        nv->grids.push_back(grid);
+    }
+
+    if (!desktop) {
+        //add canvasitem to all desktops
+        for(auto view : nv->views) {
+            grid->createCanvasItem(view);
+        }
+    } else {
+        //add canvasitem only for specified desktop
+        grid->createCanvasItem(desktop);
+    }
+
+    return grid;
+}
+
+/**
+ * Update the visibility of the viewport space. This can look like a page
+ * if there's no multi-pages, or invisible if it shadows the first page.
+ */
+void SPNamedView::updateViewPort()
+{
+    auto box = document->preferredBounds();
+    if (auto page = document->getPageManager().getPageAt(box->corner(0))) {
+        // An existing page is set as the main page, so hide th viewport canvas item.
+        _viewport->hide();
+        page->setDesktopRect(*box);
+    } else {
+        // Otherwise we are showing the viewport item.
+        _viewport->show();
+        _viewport->update(*box, nullptr, document->getPageManager().hasPages());
+    }
+}
+
+void SPNamedView::child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref) {
+    SPObjectGroup::child_added(child, ref);
+
+    SPObject *no = this->document->getObjectByRepr(child);
+    if (!no)
+        return;
+
+    if (!strcmp(child->name(), "inkscape:grid")) {
+        sp_namedview_add_grid(this, child, nullptr);
+    } else if (!strcmp(child->name(), "inkscape:page")) {
+        if (auto page = dynamic_cast<SPPage *>(no)) {
+            document->getPageManager().addPage(page);
+            for (auto view : this->views) {
+                page->showPage(view->getCanvasPagesBg(), view->getCanvasPagesFg());
+            }
+        }
+    } else {
+        if (auto g = dynamic_cast<SPGuide *>(no)) {
+            this->guides.push_back(g);
+
+            //g_object_set(G_OBJECT(g), "color", this->guidecolor, "hicolor", this->guidehicolor, NULL);
+            g->setColor(this->guidecolor);
+            g->setHiColor(this->guidehicolor);
+            g->readAttr(SPAttr::INKSCAPE_COLOR);
+
+            if (this->editable) {
+                for(auto view : this->views) {
+                    g->SPGuide::showSPGuide(view->getCanvasGuides());
+
+                    if (view->guides_active) {
+                        g->sensitize(view->getCanvas(), TRUE);
+                    }
+
+                    this->setShowGuideSingle(g);
+                }
+            }
+        }
+    }
+}
+
+void SPNamedView::remove_child(Inkscape::XML::Node *child) {
+    if (!strcmp(child->name(), "inkscape:grid")) {
+        for(std::vector<Inkscape::CanvasGrid *>::iterator it=this->grids.begin();it!=this->grids.end();++it ) {
+            if ( (*it)->repr == child ) {
+                delete (*it);
+                this->grids.erase(it);
+                break;
+            }
+        }
+    } else if (!strcmp(child->name(), "inkscape:page")) {
+        document->getPageManager().removePage(child);
+    } else {
+        for(std::vector<SPGuide *>::iterator it=this->guides.begin();it!=this->guides.end();++it ) {
+            if ( (*it)->getRepr() == child ) {
+                this->guides.erase(it);
+                break;
+            }
+        }
+    }
+
+    SPObjectGroup::remove_child(child);
+}
+
+void SPNamedView::order_changed(Inkscape::XML::Node *child, Inkscape::XML::Node *old_repr,
+                                Inkscape::XML::Node *new_repr)
+{
+    SPObjectGroup::order_changed(child, old_repr, new_repr);
+    if (!strcmp(child->name(), "inkscape:page")) {
+        document->getPageManager().reorderPage(child);
+    }
+}
+
+Inkscape::XML::Node* SPNamedView::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if ( ( flags & SP_OBJECT_WRITE_EXT ) &&
+         repr != this->getRepr() )
+    {
+        if (repr) {
+            repr->mergeFrom(this->getRepr(), "id");
+        } else {
+            repr = this->getRepr()->duplicate(xml_doc);
+        }
+    }
+
+    return repr;
+}
+
+void SPNamedView::show(SPDesktop *desktop)
+{
+
+    for(auto guide : this->guides) {
+        guide->showSPGuide( desktop->getCanvasGuides() );
+
+        if (desktop->guides_active) {
+            guide->sensitize(desktop->getCanvas(), TRUE);
+        }
+        this->setShowGuideSingle(guide);
+    }
+
+    auto box = document->preferredBounds();
+    _viewport->add(*box, desktop->getCanvasPagesBg(), desktop->getCanvasPagesFg());
+    document->getPageManager().setDefaultAttributes(_viewport);
+    updateViewPort();
+
+    for (auto page : document->getPageManager().getPages()) {
+        page->showPage(desktop->getCanvasPagesBg(), desktop->getCanvasPagesFg());
+    }
+
+    views.push_back(desktop);
+
+    // generate grids specified in SVG:
+    Inkscape::XML::Node *repr = this->getRepr();
+    if (repr) {
+        for (Inkscape::XML::Node * child = repr->firstChild() ; child != nullptr; child = child->next() ) {
+            if (!strcmp(child->name(), "inkscape:grid")) {
+                sp_namedview_add_grid(this, child, desktop);
+            }
+        }
+    }
+
+    desktop->showGrids(grids_visible, false);
+}
+
+/*
+ * Restores window geometry from the document settings or defaults in prefs
+ */
+void sp_namedview_window_from_document(SPDesktop *desktop)
+{
+    SPNamedView *nv = desktop->namedview;
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int window_geometry = prefs->getInt("/options/savewindowgeometry/value", PREFS_WINDOW_GEOMETRY_NONE);
+    int default_size = prefs->getInt("/options/defaultwindowsize/value", PREFS_WINDOW_SIZE_NATURAL);
+    bool new_document = (nv->window_width <= 0) || (nv->window_height <= 0);
+
+    // restore window size and position stored with the document
+    Gtk::Window *win = desktop->getToplevel();
+    g_assert(win);
+
+    if (window_geometry == PREFS_WINDOW_GEOMETRY_LAST) {
+        gint pw = prefs->getInt("/desktop/geometry/width", -1);
+        gint ph = prefs->getInt("/desktop/geometry/height", -1);
+        gint px = prefs->getInt("/desktop/geometry/x", -1);
+        gint py = prefs->getInt("/desktop/geometry/y", -1);
+        gint full = prefs->getBool("/desktop/geometry/fullscreen");
+        gint maxed = prefs->getBool("/desktop/geometry/maximized");
+        if (pw>0 && ph>0) {
+
+            Gdk::Rectangle monitor_geometry = Inkscape::UI::get_monitor_geometry_at_point(px, py);
+            pw = std::min(pw, monitor_geometry.get_width());
+            ph = std::min(ph, monitor_geometry.get_height());
+            desktop->setWindowSize(pw, ph);
+            desktop->setWindowPosition(Geom::Point(px, py));
+        }
+        if (maxed) {
+            win->maximize();
+        }
+        if (full) {
+            win->fullscreen();
+        }
+    } else if ((window_geometry == PREFS_WINDOW_GEOMETRY_FILE && nv->window_maximized) ||
+               (new_document && (default_size == PREFS_WINDOW_SIZE_MAXIMIZED))) {
+        win->maximize();
+    } else {
+        const int MIN_WINDOW_SIZE = 600;
+
+        int w = prefs->getInt("/template/base/inkscape:window-width", 0);
+        int h = prefs->getInt("/template/base/inkscape:window-height", 0);
+        bool move_to_screen = false;
+        if (window_geometry == PREFS_WINDOW_GEOMETRY_FILE && !new_document) {
+            Gdk::Rectangle monitor_geometry = Inkscape::UI::get_monitor_geometry_at_point(nv->window_x, nv->window_y);
+            w = MIN(monitor_geometry.get_width(), nv->window_width);
+            h = MIN(monitor_geometry.get_height(), nv->window_height);
+            move_to_screen = true;
+        } else if (default_size == PREFS_WINDOW_SIZE_LARGE) {
+            Gdk::Rectangle monitor_geometry = Inkscape::UI::get_monitor_geometry_at_window(win->get_window());
+            w = MAX(0.75 * monitor_geometry.get_width(), MIN_WINDOW_SIZE);
+            h = MAX(0.75 * monitor_geometry.get_height(), MIN_WINDOW_SIZE);
+        } else if (default_size == PREFS_WINDOW_SIZE_SMALL) {
+            w = h = MIN_WINDOW_SIZE;
+        } else if (default_size == PREFS_WINDOW_SIZE_NATURAL) {
+            // don't set size (i.e. keep the gtk+ default, which will be the natural size)
+            // unless gtk+ decided it would be a good idea to show a window that is larger than the screen
+            Gdk::Rectangle monitor_geometry = Inkscape::UI::get_monitor_geometry_at_window(win->get_window());
+            int monitor_width =  monitor_geometry.get_width();
+            int monitor_height = monitor_geometry.get_height();
+            int window_width, window_height;
+            win->get_size(window_width, window_height);
+            if (window_width > monitor_width || window_height > monitor_height) {
+                w = std::min(monitor_width, window_width);
+                h = std::min(monitor_height, window_height);
+            }
+        }
+        if ((w > 0) && (h > 0)) {
+            desktop->setWindowSize(w, h);
+            if (move_to_screen) {
+                desktop->setWindowPosition(Geom::Point(nv->window_x, nv->window_y));
+            }
+        }
+    }
+
+    // Cancel any history of transforms up to this point (must be before call to zoom).
+    desktop->clear_transform_history();
+}
+
+/*
+ * Restores zoom and view from the document settings
+ */
+void sp_namedview_zoom_and_view_from_document(SPDesktop *desktop)
+{
+    SPNamedView *nv = desktop->namedview;
+    if (nv->zoom != 0 && nv->zoom != HUGE_VAL && !std::isnan(nv->zoom)
+        && nv->cx != HUGE_VAL && !std::isnan(nv->cx)
+        && nv->cy != HUGE_VAL && !std::isnan(nv->cy)) {
+        desktop->zoom_absolute( Geom::Point(nv->cx, nv->cy), nv->zoom, false );
+    } else if (auto document = desktop->getDocument()) {
+        // document without saved zoom, zoom to its page
+        document->getPageManager().zoomToSelectedPage(desktop);
+    }
+    if (nv->rotation != 0 && nv->rotation != HUGE_VAL && !std::isnan(nv->rotation)) {
+        Geom::Point p;
+        if (nv->cx != HUGE_VAL && !std::isnan(nv->cx) && nv->cy != HUGE_VAL && !std::isnan(nv->cy)) {
+            p = Geom::Point(nv->cx, nv->cy);
+        }else{
+            p = desktop->current_center();
+        }
+        desktop->rotate_absolute_keep_point(p, nv->rotation * M_PI / 180.0);
+    }
+}
+
+void SPNamedView::writeNewGrid(SPDocument *document,int gridtype)
+{
+    g_assert(this->getRepr() != nullptr);
+    Inkscape::CanvasGrid::writeNewGridToRepr(this->getRepr(),document,static_cast<Inkscape::GridType>(gridtype));
+}
+
+void sp_namedview_update_layers_from_document (SPDesktop *desktop)
+{
+    SPObject *layer = nullptr;
+    SPDocument *document = desktop->doc();
+    SPNamedView *nv = desktop->namedview;
+    if ( nv->default_layer_id != 0 ) {
+        layer = document->getObjectById(g_quark_to_string(nv->default_layer_id));
+    }
+    // don't use that object if it's not at least group
+    if ( !layer || !SP_IS_GROUP(layer) ) {
+        layer = nullptr;
+    }
+    // if that didn't work out, look for the topmost layer
+    if (!layer) {
+        for (auto& iter: document->getRoot()->children) {
+            if (desktop->layerManager().isLayer(&iter)) {
+                layer = &iter;
+            }
+        }
+    }
+    if (layer) {
+        desktop->layerManager().setCurrentLayer(layer);
+    }
+
+    // FIXME: find a better place to do this
+    document->get_event_log()->updateUndoVerbs();
+}
+
+void sp_namedview_document_from_window(SPDesktop *desktop)
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int window_geometry = prefs->getInt("/options/savewindowgeometry/value", PREFS_WINDOW_GEOMETRY_NONE);
+    bool save_geometry_in_file = window_geometry == PREFS_WINDOW_GEOMETRY_FILE;
+    bool save_viewport_in_file = prefs->getBool("/options/savedocviewport/value", true);
+    Inkscape::XML::Node *view = desktop->namedview->getRepr();
+
+    // saving window geometry is not undoable
+    bool saved = DocumentUndo::getUndoSensitive(desktop->getDocument());
+    DocumentUndo::setUndoSensitive(desktop->getDocument(), false);
+
+    if (save_viewport_in_file) {
+        view->setAttributeSvgDouble("inkscape:zoom", desktop->current_zoom());
+        double rotation = ::round(desktop->current_rotation() * 180.0 / M_PI);
+        view->setAttributeSvgNonDefaultDouble("inkscape:rotation", rotation, 0.0);
+        Geom::Point center = desktop->current_center();
+        view->setAttributeSvgDouble("inkscape:cx", center.x());
+        view->setAttributeSvgDouble("inkscape:cy", center.y());
+    }
+
+    if (save_geometry_in_file) {
+        gint w, h, x, y;
+        desktop->getWindowGeometry(x, y, w, h);
+        view->setAttributeInt("inkscape:window-width", w);
+        view->setAttributeInt("inkscape:window-height", h);
+        view->setAttributeInt("inkscape:window-x", x);
+        view->setAttributeInt("inkscape:window-y", y);
+        view->setAttributeInt("inkscape:window-maximized", desktop->is_maximized());
+    }
+
+    view->setAttribute("inkscape:current-layer", desktop->layerManager().currentLayer()->getId());
+
+    // restore undoability
+    DocumentUndo::setUndoSensitive(desktop->getDocument(), saved);
+}
+
+void SPNamedView::hide(SPDesktop const *desktop)
+{
+    g_assert(desktop != nullptr);
+    g_assert(std::find(views.begin(),views.end(),desktop)!=views.end());
+    for(auto & guide : this->guides) {
+        guide->hideSPGuide(desktop->getCanvas());
+    }
+    _viewport->remove(desktop->getCanvas());
+    for (auto &page : document->getPageManager().getPages()) {
+        page->hidePage(desktop->getCanvas());
+    }
+    views.erase(std::remove(views.begin(),views.end(),desktop),views.end());
+}
+
+/**
+ * Set an attribute in the named view to the value in this preference, or use the fallback.
+ *
+ * @param attribute - The svg namedview attribute to set.
+ * @param preference - The preference to find the value from (optional)
+ * @param fallback - The fallback to use if preference not set or not found. (optional)
+ */
+void SPNamedView::setDefaultAttribute(std::string attribute, std::string preference, std::string fallback)
+{
+    if (!getAttribute(attribute.c_str())) {
+        std::string value = "";
+        if (!preference.empty()) {
+            Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+            value = prefs->getString(preference);
+        }
+        if (value.empty() && !fallback.empty()) {
+            value = fallback;
+        }
+        if (!value.empty()) {
+            setAttribute(attribute, value);
+        }
+    }
+}
+
+void SPNamedView::activateGuides(void* desktop, bool active)
+{
+    g_assert(desktop != nullptr);
+    g_assert(std::find(views.begin(),views.end(),desktop)!=views.end());
+
+    SPDesktop *dt = static_cast<SPDesktop*>(desktop);
+    for(auto & guide : this->guides) {
+        guide->sensitize(dt->getCanvas(), active);
+    }
+}
+
+void sp_namedview_show_grids(SPNamedView * namedview, bool show, bool dirty_document)
+{
+    namedview->grids_visible = show;
+
+    SPDocument *doc = namedview->document;
+    Inkscape::XML::Node *repr = namedview->getRepr();
+
+    bool saved = DocumentUndo::getUndoSensitive(doc);
+    DocumentUndo::setUndoSensitive(doc, false);
+    repr->setAttributeBoolean("showgrid", namedview->grids_visible);
+    DocumentUndo::setUndoSensitive(doc, saved);
+
+    /* we don't want the document to get dirty on startup; that's when
+       we call this function with dirty_document = false */
+    if (dirty_document) {
+        doc->setModifiedSinceSave();
+    }
+}
+
+gchar const *SPNamedView::getName() const
+{
+    return this->getAttribute("id");
+}
+
+std::vector<SPDesktop *> const SPNamedView::getViewList() const
+{
+    return views;
+}
+
+void SPNamedView::toggleShowGuides()
+{
+    setShowGuides(!getShowGuides());
+}
+
+void SPNamedView::toggleLockGuides()
+{
+    setLockGuides(!getLockGuides());
+}
+
+void SPNamedView::setShowGuides(bool v)
+{
+    if (auto repr = getRepr()) {
+        bool saved = DocumentUndo::getUndoSensitive(document);
+        DocumentUndo::setUndoSensitive(document, false);
+
+        repr->setAttributeBoolean("showguides", v);
+
+        DocumentUndo::setUndoSensitive(document, saved);
+        requestModified(SP_OBJECT_MODIFIED_FLAG);
+    }
+}
+
+void SPNamedView::setLockGuides(bool v)
+{
+    if (auto repr = getRepr()) {
+        bool saved = DocumentUndo::getUndoSensitive(document);
+        DocumentUndo::setUndoSensitive(document, false);
+
+        repr->setAttributeBoolean("inkscape:lockguides", v);
+
+        DocumentUndo::setUndoSensitive(document, saved);
+        requestModified(SP_OBJECT_MODIFIED_FLAG);
+    }
+}
+
+void SPNamedView::setShowGuideSingle(SPGuide *guide)
+{
+    if (getShowGuides())
+        guide->showSPGuide();
+    else
+        guide->hideSPGuide();
+}
+
+bool SPNamedView::getShowGuides()
+{
+    if (auto repr = getRepr()) {
+        // show guides if not specified, for backwards compatibility
+        return repr->getAttributeBoolean("showguides", true);
+    }
+
+    return false;
+}
+
+bool SPNamedView::getLockGuides()
+{
+    if (auto repr = getRepr()) {
+        return repr->getAttributeBoolean("inkscape:lockguides");
+    }
+
+    return false;
+}
+
+void SPNamedView::updateGuides()
+{
+    if (auto saction = Glib::RefPtr<Gio::SimpleAction>::cast_dynamic(
+                document->getActionGroup()->lookup_action("show-all-guides"))) {
+
+        saction->change_state(getShowGuides());
+    }
+
+    if (auto saction = Glib::RefPtr<Gio::SimpleAction>::cast_dynamic(
+                document->getActionGroup()->lookup_action("lock-all-guides"))) {
+
+        saction->change_state(getLockGuides());
+    }
+
+    for (SPGuide *guide : guides) {
+        setShowGuideSingle(guide);
+        guide->set_locked(this->getLockGuides(), true);
+    }
+}
+
+/**
+ * Gets page fitting margin information from the namedview node in the XML.
+ * \param nv_repr reference to this document's namedview
+ * \param key
+ * \param margin_units units for the margin
+ * \param return_units units to return the result in
+ * \param width width in px (for percentage margins)
+ * \param height height in px (for percentage margins)
+ * \param use_width true if the this key is left or right margins, false
+ *        otherwise.  Used for percentage margins.
+ * \return the margin size in px, else 0.0 if anything is invalid.
+ */
+double SPNamedView::getMarginLength(gchar const * const key,
+                             Inkscape::Util::Unit const * const margin_units,
+                             Inkscape::Util::Unit const * const return_units,
+                             double const width,
+                             double const height,
+                             bool const use_width)
+{
+    double value;
+    static Inkscape::Util::Unit const *percent = unit_table.getUnit("%");
+    if(!this->storeAsDouble(key,&value)) {
+        return 0.0;
+    }
+    if (*margin_units == *percent) {
+        return (use_width)? width * value : height * value;
+    }
+    if (!margin_units->compatibleWith(return_units)) {
+        return 0.0;
+    }
+    return value;
+}
+
+/**
+ * Returns namedview's default unit.
+ * If no default unit is set, "px" is returned
+ */
+Inkscape::Util::Unit const * SPNamedView::getDisplayUnit() const
+{
+    return display_units ? display_units : unit_table.getUnit("px");
+}
+
+/**
+ * Set the display unit to the given value.
+ */
+void SPNamedView::setDisplayUnit(std::string unit)
+{
+    setDisplayUnit(unit_table.getUnit(unit));
+}
+
+void SPNamedView::setDisplayUnit(Inkscape::Util::Unit const *unit)
+{
+    // If this is unset, it will be returned as px by getDisplayUnit
+    display_units = unit;
+    getRepr()->setAttributeOrRemoveIfEmpty("inkscape:document-units",
+                                           unit ? unit->abbr.c_str() : nullptr);
+}
+
+/**
+ * Returns the first grid it could find that isEnabled(). Returns NULL, if none is enabled
+ */
+Inkscape::CanvasGrid * sp_namedview_get_first_enabled_grid(SPNamedView *namedview)
+{
+    for(auto grid : namedview->grids) {
+        if (grid->isEnabled())
+            return grid;
+    }
+
+    return nullptr;
+}
+
+void SPNamedView::translateGuides(Geom::Translate const &tr) {
+    for(auto & it : this->guides) {
+        SPGuide &guide = *it;
+        Geom::Point point_on_line = guide.getPoint();
+        point_on_line *= tr;
+        guide.moveto(point_on_line, true);
+    }
+}
+
+void SPNamedView::translateGrids(Geom::Translate const &tr) {
+    for(auto & grid : this->grids) {
+        grid->setOrigin(grid->origin * tr);
+    }
+}
+
+void SPNamedView::scrollAllDesktops(double dx, double dy, bool is_scrolling) {
+    for(auto & view : this->views) {
+        view->scroll_relative_in_svg_coords(dx, dy, is_scrolling);
+    }
+}
+
+void SPNamedView::change_color(unsigned int rgba, SPAttr color_key, SPAttr opacity_key /*= SPAttr::INVALID*/) {
+    gchar buf[32];
+    sp_svg_write_color(buf, sizeof(buf), rgba);
+    getRepr()->setAttribute(sp_attribute_name(color_key), buf);
+
+    if (opacity_key != SPAttr::INVALID) {
+        getRepr()->setAttributeCssDouble(sp_attribute_name(opacity_key), (rgba & 0xff) / 255.0);
+    }
+}
+
+void SPNamedView::change_bool_setting(SPAttr key, bool value) {
+    const char* str_value = nullptr;
+    if (key == SPAttr::SHAPE_RENDERING) {
+        str_value = value ? "auto" : "crispEdges";
+    }
+    else {
+        str_value = value ? "true" : "false";
+    }
+    getRepr()->setAttribute(sp_attribute_name(key), str_value);
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :