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Diffstat (limited to 'src/ui/drag-and-drop.cpp')
| -rw-r--r-- | src/ui/drag-and-drop.cpp | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/src/ui/drag-and-drop.cpp b/src/ui/drag-and-drop.cpp new file mode 100644 index 0000000..21ec2c3 --- /dev/null +++ b/src/ui/drag-and-drop.cpp @@ -0,0 +1,429 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/** + * @file + * Drag and drop of drawings onto canvas. + */ + +/* Authors: + * + * Copyright (C) Tavmjong Bah 2019 + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "drag-and-drop.h" + +#include <array> +#include <glibmm/i18n.h> // Internationalization + +#include "desktop-style.h" +#include "document.h" +#include "document-undo.h" +#include "gradient-drag.h" +#include "file.h" +#include "selection.h" +#include "style.h" +#include "layer-manager.h" + +#include "extension/db.h" +#include "extension/find_extension_by_mime.h" + +#include "object/sp-shape.h" +#include "object/sp-text.h" +#include "object/sp-flowtext.h" + +#include "path/path-util.h" + +#include "svg/svg-color.h" // write color + +#include "ui/clipboard.h" +#include "ui/interface.h" +#include "ui/tools/tool-base.h" +#include "ui/widget/canvas.h" // Target, canvas to world transform. + +#include "widgets/desktop-widget.h" +#include "widgets/paintdef.h" + +using Inkscape::DocumentUndo; + +/* Drag and Drop */ +enum ui_drop_target_info { + URI_LIST, + SVG_XML_DATA, + SVG_DATA, + PNG_DATA, + JPEG_DATA, + IMAGE_DATA, + APP_X_INKY_COLOR, + APP_X_COLOR, + APP_OSWB_COLOR, + APP_X_INK_PASTE +}; + +static const std::array<Gtk::TargetEntry, 8> ui_drop_target_entries = { + Gtk::TargetEntry("text/uri-list", Gtk::TargetFlags(0), URI_LIST ), + Gtk::TargetEntry("image/svg+xml", Gtk::TargetFlags(0), SVG_XML_DATA ), + Gtk::TargetEntry("image/svg", Gtk::TargetFlags(0), SVG_DATA ), + Gtk::TargetEntry("image/png", Gtk::TargetFlags(0), PNG_DATA ), + Gtk::TargetEntry("image/jpeg", Gtk::TargetFlags(0), JPEG_DATA ), + Gtk::TargetEntry("application/x-oswb-color", Gtk::TargetFlags(0), APP_OSWB_COLOR ), + Gtk::TargetEntry("application/x-color", Gtk::TargetFlags(0), APP_X_COLOR ), + Gtk::TargetEntry("application/x-inkscape-paste", Gtk::TargetFlags(0), APP_X_INK_PASTE) +}; + +static std::vector<Gtk::TargetEntry> completeDropTargets; + +/** Convert screen (x, y) coordinates to desktop coordinates. */ +inline Geom::Point world2desktop(SPDesktop *desktop, int x, int y) +{ + g_assert(desktop); + return (Geom::Point(x, y) + desktop->canvas->get_area_world().min()) * desktop->w2d(); +} + +// Drag and Drop +static void ink_drag_data_received(GtkWidget *widget, + GdkDragContext *drag_context, + gint x, gint y, + GtkSelectionData *data, + guint info, + guint /*event_time*/, + gpointer user_data) +{ + auto dtw = static_cast<SPDesktopWidget *>(user_data); + SPDesktop *desktop = dtw->desktop; + SPDocument *doc = desktop->doc(); + + switch (info) { + case APP_X_COLOR: + { + int destX = 0; + int destY = 0; + auto canvas = dtw->get_canvas(); + gtk_widget_translate_coordinates( widget, GTK_WIDGET(canvas->gobj()), x, y, &destX, &destY ); + Geom::Point where( canvas->canvas_to_world(Geom::Point(destX, destY))); + Geom::Point const button_dt(desktop->w2d(where)); + Geom::Point const button_doc(desktop->dt2doc(button_dt)); + + if ( gtk_selection_data_get_length (data) == 8 ) { + gchar colorspec[64] = {0}; + // Careful about endian issues. + guint16* dataVals = (guint16*)gtk_selection_data_get_data (data); + sp_svg_write_color( colorspec, sizeof(colorspec), + SP_RGBA32_U_COMPOSE( + 0x0ff & (dataVals[0] >> 8), + 0x0ff & (dataVals[1] >> 8), + 0x0ff & (dataVals[2] >> 8), + 0xff // can't have transparency in the color itself + //0x0ff & (data->data[3] >> 8), + )); + + SPItem *item = desktop->getItemAtPoint( where, true ); + + bool consumed = false; + if (desktop->event_context && desktop->event_context->get_drag()) { + consumed = desktop->event_context->get_drag()->dropColor(item, colorspec, button_dt); + if (consumed) { + DocumentUndo::done( doc , _("Drop color on gradient"), "" ); + desktop->event_context->get_drag()->updateDraggers(); + } + } + + //if (!consumed && tools_active(desktop, TOOLS_TEXT)) { + // consumed = sp_text_context_drop_color(c, button_doc); + // if (consumed) { + // SPDocumentUndo::done( doc , _("Drop color on gradient stop"), ""); + // } + //} + + if (!consumed && item) { + bool fillnotstroke = (gdk_drag_context_get_actions (drag_context) != GDK_ACTION_MOVE); + if (fillnotstroke && + (is<SPShape>(item) || is<SPText>(item) || is<SPFlowtext>(item))) { + Path *livarot_path = Path_for_item(item, true, true); + livarot_path->ConvertWithBackData(0.04); + + std::optional<Path::cut_position> position = get_nearest_position_on_Path(livarot_path, button_doc); + if (position) { + Geom::Point nearest = get_point_on_Path(livarot_path, position->piece, position->t); + Geom::Point delta = nearest - button_doc; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + delta = desktop->d2w(delta); + double stroke_tolerance = + ( !item->style->stroke.isNone() ? + desktop->current_zoom() * + item->style->stroke_width.computed * + item->i2dt_affine().descrim() * 0.5 + : 0.0) + + prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); + + if (Geom::L2 (delta) < stroke_tolerance) { + fillnotstroke = false; + } + } + delete livarot_path; + } + + SPCSSAttr *css = sp_repr_css_attr_new(); + sp_repr_css_set_property( css, fillnotstroke ? "fill":"stroke", colorspec ); + + sp_desktop_apply_css_recursive( item, css, true ); + item->updateRepr(); + + DocumentUndo::done( doc , _("Drop color"), "" ); + } + } + } + break; + + case APP_OSWB_COLOR: + { + bool worked = false; + Glib::ustring colorspec; + if ( gtk_selection_data_get_format (data) == 8 ) { + PaintDef color; + worked = color.fromMIMEData("application/x-oswb-color", + reinterpret_cast<char const*>(gtk_selection_data_get_data(data)), + gtk_selection_data_get_length(data)); + if ( worked ) { + if ( color.get_type() == PaintDef::NONE ) { + colorspec = "none"; + } else { + auto [r, g, b] = color.get_rgb(); + + SPGradient* matches = nullptr; + std::vector<SPObject *> gradients = doc->getResourceList("gradient"); + for (auto gradient : gradients) { + auto grad = cast<SPGradient>(gradient); + if (color.get_description() == grad->getId()) { + if (grad->hasStops()) { + matches = grad; + break; + } + } + } + if (matches) { + colorspec = "url(#"; + colorspec += matches->getId(); + colorspec += ")"; + } else { + gchar* tmp = g_strdup_printf("#%02x%02x%02x", r, g, b); + colorspec = tmp; + g_free(tmp); + } + } + } + } + if ( worked ) { + int destX = 0; + int destY = 0; + auto canvas = dtw->get_canvas(); + gtk_widget_translate_coordinates( widget, GTK_WIDGET(canvas->gobj()), x, y, &destX, &destY ); + Geom::Point where( canvas->canvas_to_world(Geom::Point(destX, destY))); + Geom::Point const button_dt(desktop->w2d(where)); + Geom::Point const button_doc(desktop->dt2doc(button_dt)); + + SPItem *item = desktop->getItemAtPoint( where, true ); + + bool consumed = false; + if (desktop->event_context && desktop->event_context->get_drag()) { + consumed = desktop->event_context->get_drag()->dropColor(item, colorspec.c_str(), button_dt); + if (consumed) { + DocumentUndo::done( doc, _("Drop color on gradient"), "" ); + desktop->event_context->get_drag()->updateDraggers(); + } + } + + if (!consumed && item) { + bool fillnotstroke = (gdk_drag_context_get_actions (drag_context) != GDK_ACTION_MOVE); + if (fillnotstroke && + (is<SPShape>(item) || is<SPText>(item) || is<SPFlowtext>(item))) { + Path *livarot_path = Path_for_item(item, true, true); + livarot_path->ConvertWithBackData(0.04); + + std::optional<Path::cut_position> position = get_nearest_position_on_Path(livarot_path, button_doc); + if (position) { + Geom::Point nearest = get_point_on_Path(livarot_path, position->piece, position->t); + Geom::Point delta = nearest - button_doc; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + delta = desktop->d2w(delta); + double stroke_tolerance = + ( !item->style->stroke.isNone() ? + desktop->current_zoom() * + item->style->stroke_width.computed * + item->i2dt_affine().descrim() * 0.5 + : 0.0) + + prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); + + if (Geom::L2 (delta) < stroke_tolerance) { + fillnotstroke = false; + } + } + delete livarot_path; + } + + SPCSSAttr *css = sp_repr_css_attr_new(); + sp_repr_css_set_property( css, fillnotstroke ? "fill":"stroke", colorspec.c_str() ); + + sp_desktop_apply_css_recursive( item, css, true ); + item->updateRepr(); + + DocumentUndo::done( doc, _("Drop color"), "" ); + } + } + } + break; + + case SVG_DATA: + case SVG_XML_DATA: { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + prefs->setBool("/options/onimport", true); + gchar *svgdata = (gchar *)gtk_selection_data_get_data (data); + + Inkscape::XML::Document *rnewdoc = sp_repr_read_mem(svgdata, gtk_selection_data_get_length (data), SP_SVG_NS_URI); + + if (rnewdoc == nullptr) { + sp_ui_error_dialog(_("Could not parse SVG data")); + return; + } + + Inkscape::XML::Node *repr = rnewdoc->root(); + gchar const *style = repr->attribute("style"); + + + Inkscape::XML::Document * xml_doc = doc->getReprDoc(); + Inkscape::XML::Node *newgroup = xml_doc->createElement("svg:g"); + newgroup->setAttribute("style", style); + for (Inkscape::XML::Node *child = repr->firstChild(); child != nullptr; child = child->next()) { + Inkscape::XML::Node *newchild = child->duplicate(xml_doc); + newgroup->appendChild(newchild); + } + + Inkscape::GC::release(rnewdoc); + + // Add it to the current layer + + // Greg's edits to add intelligent positioning of svg drops + SPObject *new_obj = nullptr; + new_obj = desktop->layerManager().currentLayer()->appendChildRepr(newgroup); + + Inkscape::Selection *selection = desktop->getSelection(); + selection->set(cast<SPItem>(new_obj)); + + // move to mouse pointer + { + desktop->getDocument()->ensureUpToDate(); + Geom::OptRect sel_bbox = selection->visualBounds(); + if (sel_bbox) { + Geom::Point m( desktop->point() - sel_bbox->midpoint() ); + selection->moveRelative(m, false); + } + } + + Inkscape::GC::release(newgroup); + DocumentUndo::done( doc, _("Drop SVG"), "" ); + prefs->setBool("/options/onimport", false); + break; + } + + case URI_LIST: { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + prefs->setBool("/options/onimport", true); + gchar *uri = (gchar *)gtk_selection_data_get_data (data); + sp_ui_import_files(uri); + prefs->setBool("/options/onimport", false); + break; + } + + case APP_X_INK_PASTE: { + auto *cm = Inkscape::UI::ClipboardManager::get(); + cm->insertSymbol(desktop, world2desktop(desktop, x, y)); + DocumentUndo::done(doc, _("Drop Symbol"), ""); + break; + } + + case PNG_DATA: + case JPEG_DATA: + case IMAGE_DATA: { + Inkscape::Extension::Extension *ext = Inkscape::Extension::find_by_mime((info == JPEG_DATA ? "image/jpeg" : "image/png")); + bool save = (strcmp(ext->get_param_optiongroup("link"), "embed") == 0); + ext->set_param_optiongroup("link", "embed"); + ext->set_gui(false); + + gchar *filename = g_build_filename( g_get_tmp_dir(), "inkscape-dnd-import", nullptr ); + g_file_set_contents(filename, + reinterpret_cast<gchar const *>(gtk_selection_data_get_data (data)), + gtk_selection_data_get_length (data), + nullptr); + file_import(doc, filename, ext); + g_free(filename); + + ext->set_param_optiongroup("link", save ? "embed" : "link"); + ext->set_gui(true); + DocumentUndo::done( doc, _("Drop bitmap image"), "" ); + break; + } + } +} + +#if 0 +static +void ink_drag_motion( GtkWidget */*widget*/, + GdkDragContext */*drag_context*/, + gint /*x*/, gint /*y*/, + GtkSelectionData */*data*/, + guint /*info*/, + guint /*event_time*/, + gpointer /*user_data*/) +{ +// SPDocument *doc = SP_ACTIVE_DOCUMENT; +// SPDesktop *desktop = SP_ACTIVE_DESKTOP; + + +// g_message("drag-n-drop motion (%4d, %4d) at %d", x, y, event_time); +} + +static void ink_drag_leave( GtkWidget */*widget*/, + GdkDragContext */*drag_context*/, + guint /*event_time*/, + gpointer /*user_data*/ ) +{ +// g_message("drag-n-drop leave at %d", event_time); +} +#endif + +void ink_drag_setup(SPDesktopWidget *dtw) +{ + if (completeDropTargets.empty()) { + for (auto const &entry : ui_drop_target_entries) { + completeDropTargets.emplace_back(entry); + } + for (auto const &fmt : Gdk::Pixbuf::get_formats()) { + for (auto &type : fmt.get_mime_types()) { + completeDropTargets.emplace_back(std::move(type), Gtk::TargetFlags(0), IMAGE_DATA); + } + } + } + + auto canvas = dtw->get_canvas(); + + canvas->drag_dest_set(completeDropTargets, + Gtk::DestDefaults::DEST_DEFAULT_ALL, + Gdk::DragAction::ACTION_COPY | Gdk::DragAction::ACTION_MOVE); + + g_signal_connect(G_OBJECT(canvas->gobj()), + "drag_data_received", + G_CALLBACK(ink_drag_data_received), + dtw); +} + +/* + 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 : |