Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 402 insertions, 0 deletions

diff --git a/src/ui/tools/dropper-tool.cpp b/src/ui/tools/dropper-tool.cpp
new file mode 100644
index 0000000..e7ff4fb
--- /dev/null
+++ b/src/ui/tools/dropper-tool.cpp
@@ -0,0 +1,402 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Tool for picking colors from drawing
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2005 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glibmm/i18n.h>
+#include <gdk/gdk.h>
+#include <gdk/gdkkeysyms.h>
+
+#include <2geom/transforms.h>
+#include <2geom/circle.h>
+
+#include "desktop-style.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "message-context.h"
+#include "preferences.h"
+#include "selection.h"
+#include "style.h"
+#include "page-manager.h"
+
+#include "display/curve.h"
+#include "display/drawing.h"
+#include "display/control/canvas-item-bpath.h"
+#include "display/control/canvas-item-drawing.h"
+
+#include "include/macros.h"
+
+#include "object/sp-namedview.h"
+
+#include "svg/svg-color.h"
+
+#include "ui/cursor-utils.h"
+#include "ui/icon-names.h"
+#include "ui/tools/dropper-tool.h"
+#include "ui/widget/canvas.h"
+
+using Inkscape::DocumentUndo;
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+DropperTool::DropperTool(SPDesktop *desktop)
+    : ToolBase(desktop, "/tools/dropper", "dropper-pick-fill.svg")
+{
+    area = new Inkscape::CanvasItemBpath(desktop->getCanvasControls());
+    area->set_stroke(0x0000007f);
+    area->set_fill(0x0, SP_WIND_RULE_EVENODD);
+    area->hide();
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    
+    if (prefs->getBool("/tools/dropper/selcue")) {
+        this->enableSelectionCue();
+    }
+
+    if (prefs->getBool("/tools/dropper/gradientdrag")) {
+        this->enableGrDrag();
+    }
+}
+
+DropperTool::~DropperTool()
+{
+    this->enableGrDrag(false);
+
+    ungrabCanvasEvents();
+
+    if (this->area) {
+        delete this->area;
+        this->area = nullptr;
+    }
+}
+
+/**
+ * Returns the current dropper context color.
+ *
+ * - If in dropping mode, returns color from selected objects.
+ * Ignored if non_dropping set to true.
+ * - If in dragging mode, returns average color on canvas, depending on radius
+ * - If in pick mode, alpha is not premultiplied. Alpha is only set if in pick mode
+ * and setalpha is true. Both values are taken from preferences.
+ *
+ * @param invert If true, invert the rgb value
+ * @param non_dropping If true, use color from canvas, even in dropping mode.
+ */
+guint32 DropperTool::get_color(bool invert, bool non_dropping) {
+    Inkscape::Preferences   *prefs = Inkscape::Preferences::get();
+
+    int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE);
+    bool setalpha = prefs->getBool("/tools/dropper/setalpha", true);
+
+    // non_dropping ignores dropping mode and always uses color from canvas.
+    // Used by the clipboard
+    double r = non_dropping ? this->non_dropping_R : this->R;
+    double g = non_dropping ? this->non_dropping_G : this->G;
+    double b = non_dropping ? this->non_dropping_B : this->B;
+    double a = non_dropping ? this->non_dropping_A : this->alpha;
+
+    return SP_RGBA32_F_COMPOSE(
+        fabs(invert - r),
+        fabs(invert - g),
+        fabs(invert - b),
+       (pick == SP_DROPPER_PICK_ACTUAL && setalpha) ? a : 1.0);
+}
+
+bool DropperTool::root_handler(GdkEvent* event) {
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    int ret = FALSE;
+    int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE);
+
+    // Decide first what kind of 'mode' we're in.
+    if (event->type == GDK_KEY_PRESS || event->type == GDK_KEY_RELEASE) {
+        switch (event->key.keyval) {
+            case GDK_KEY_Shift_L:
+            case GDK_KEY_Shift_R:
+                this->stroke = event->type == GDK_KEY_PRESS;
+                break;
+            case GDK_KEY_Control_L:
+            case GDK_KEY_Control_R:
+                this->dropping = event->type == GDK_KEY_PRESS;
+                break;
+            case GDK_KEY_Alt_L:
+            case GDK_KEY_Alt_R:
+                this->invert = event->type == GDK_KEY_PRESS;
+                break;
+        }
+    }
+
+    // Get color from selected object
+    // Only if dropping mode enabled and object's color is set.
+    // Otherwise dropping mode disabled.
+    if(this->dropping) {
+        Inkscape::Selection *selection = _desktop->getSelection();
+        g_assert(selection);
+        guint32 apply_color;
+        bool apply_set = false;
+        for (auto& obj: selection->objects()) {
+            if(obj->style) {
+                double opacity = 1.0;
+                if(!this->stroke && obj->style->fill.set) {
+                    if(obj->style->fill_opacity.set) {
+                        opacity = SP_SCALE24_TO_FLOAT(obj->style->fill_opacity.value);
+                    }
+                    apply_color = obj->style->fill.value.color.toRGBA32(opacity);
+                    apply_set = true;
+                } else if(this->stroke && obj->style->stroke.set) {
+                    if(obj->style->stroke_opacity.set) {
+                        opacity = SP_SCALE24_TO_FLOAT(obj->style->stroke_opacity.value);
+                    }
+                    apply_color = obj->style->stroke.value.color.toRGBA32(opacity);
+                    apply_set = true;
+                }
+            }
+        }
+        if(apply_set) {
+            this->R = SP_RGBA32_R_F(apply_color);
+            this->G = SP_RGBA32_G_F(apply_color);
+            this->B = SP_RGBA32_B_F(apply_color);
+            this->alpha = SP_RGBA32_A_F(apply_color);
+        } else {
+            // This means that having no selection or some other error
+            // we will default back to normal dropper mode.
+            this->dropping = false;
+        }
+    }
+
+    switch (event->type) {
+	case GDK_BUTTON_PRESS:
+            if (event->button.button == 1) {
+                this->centre = Geom::Point(event->button.x, event->button.y);
+                this->dragging = true;
+                ret = TRUE;
+            }
+
+            grabCanvasEvents(Gdk::KEY_PRESS_MASK      |
+                             Gdk::KEY_RELEASE_MASK    |
+                             Gdk::BUTTON_RELEASE_MASK |
+                             Gdk::POINTER_MOTION_MASK |
+                             Gdk::BUTTON_PRESS_MASK   );
+            break;
+
+	case GDK_MOTION_NOTIFY:
+            if (event->motion.state & GDK_BUTTON2_MASK || event->motion.state & GDK_BUTTON3_MASK) {
+                // pass on middle and right drag
+                ret = FALSE;
+                break;
+            } else {
+                // otherwise, constantly calculate color no matter if any button pressed or not
+
+                Geom::IntRect pick_area;
+                if (this->dragging) {
+                    // calculate average
+
+                    // radius
+                    double rw = std::min(Geom::L2(Geom::Point(event->button.x, event->button.y) - this->centre), 400.0);
+                    if (rw == 0) { // happens sometimes, little idea why...
+                        break;
+                    }
+                    this->radius = rw;
+
+                    Geom::Point const cd = _desktop->w2d(this->centre);
+                    Geom::Affine const w2dt = _desktop->w2d();
+                    const double scale = rw * w2dt.descrim();
+                    Geom::Affine const sm( Geom::Scale(scale, scale) * Geom::Translate(cd) );
+
+                    // Show circle on canvas
+                    Geom::PathVector path = Geom::Path(Geom::Circle(0, 0, 1)); // Unit circle centered at origin.
+                    path *= sm;
+                    this->area->set_bpath(path);
+                    this->area->show();
+
+                    /* Get buffer */
+                    Geom::Rect r(this->centre, this->centre);
+                    r.expandBy(rw);
+                    if (!r.hasZeroArea()) {
+                        pick_area = r.roundOutwards();
+
+                    }
+                } else {
+                    // pick single pixel
+                    pick_area = Geom::IntRect::from_xywh(floor(event->button.x), floor(event->button.y), 1, 1);
+                }
+
+                Inkscape::CanvasItemDrawing *canvas_item_drawing = _desktop->getCanvasDrawing();
+                Inkscape::Drawing *drawing = canvas_item_drawing->get_drawing();
+
+                // Ensure drawing up-to-date. (Is this really necessary?)
+                drawing->update();
+
+                // Get average color.
+                double R, G, B, A;
+                drawing->average_color(pick_area, R, G, B, A);
+
+                if (pick == SP_DROPPER_PICK_VISIBLE) {
+                    // compose with page color
+                    auto bg = _desktop->getDocument()->getPageManager().getDefaultBackgroundColor();
+                    R = R + bg[0] * (1 - A);
+                    G = G + bg[1] * (1 - A);
+                    B = B + bg[2] * (1 - A);
+                    A = 1.0;
+                } else {
+                    // un-premultiply color channels
+                    if (A > 0) {
+                        R /= A;
+                        G /= A;
+                        B /= A;
+                    }
+                }
+
+                if (fabs(A) < 1e-4) {
+                    A = 0; // suppress exponentials, CSS does not allow that
+                }
+
+                // remember color
+                if (!this->dropping) {
+                    this->R = R;
+                    this->G = G;
+                    this->B = B;
+                    this->alpha = A;
+                }
+                // remember color from canvas, even in dropping mode
+                // These values are used by the clipboard
+                this->non_dropping_R = R;
+                this->non_dropping_G = G;
+                this->non_dropping_B = B;
+                this->non_dropping_A = A;
+
+                ret = TRUE;
+            }
+            break;
+
+	case GDK_BUTTON_RELEASE:
+            if (event->button.button == 1) {
+                this->area->hide();
+		this->dragging = false;
+
+                ungrabCanvasEvents();
+
+                Inkscape::Selection *selection = _desktop->getSelection();
+                g_assert(selection);
+                std::vector<SPItem *> old_selection(selection->items().begin(), selection->items().end());
+                if(this->dropping) {
+		    Geom::Point const button_w(event->button.x, event->button.y);
+		    // remember clicked item, disregarding groups, honoring Alt
+		    this->item_to_select = sp_event_context_find_item (_desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
+
+                    // Change selected object to object under cursor
+                    if (this->item_to_select) {
+                        std::vector<SPItem *> vec(selection->items().begin(), selection->items().end());
+                        selection->set(this->item_to_select);
+                    }
+                }
+
+                auto picked_color = ColorRGBA(this->get_color(this->invert));
+
+                // One time pick has active signal, call them all and clear.
+                if (!onetimepick_signal.empty())
+                {
+                    onetimepick_signal.emit(&picked_color);
+                    onetimepick_signal.clear();
+                    // Do this last as it destroys the picker tool.
+                    sp_toggle_dropper(_desktop);
+                    return true;
+                }
+
+                // do the actual color setting
+                sp_desktop_set_color(_desktop, picked_color, false, !this->stroke);
+
+                // REJON: set aux. toolbar input to hex color!
+                if (!(_desktop->getSelection()->isEmpty())) {
+                    DocumentUndo::done(_desktop->getDocument(), _("Set picked color"), INKSCAPE_ICON("color-picker"));
+                }
+                if(this->dropping) {
+                    selection->setList(old_selection);
+                }
+
+
+                ret = TRUE;
+            }
+            break;
+
+    case GDK_KEY_PRESS:
+        switch (get_latin_keyval(&event->key)) {
+          case GDK_KEY_Up:
+          case GDK_KEY_Down:
+          case GDK_KEY_KP_Up:
+          case GDK_KEY_KP_Down:
+            // prevent the zoom field from activation
+            if (!MOD__CTRL_ONLY(event)) {
+                ret = TRUE;
+            }
+            break;
+          case GDK_KEY_Escape:
+              _desktop->getSelection()->clear();
+              break;
+        }
+        break;
+    }
+
+    // set the status message to the right text.
+    gchar c[64];
+    sp_svg_write_color(c, sizeof(c), this->get_color(this->invert));
+
+    // alpha of color under cursor, to show in the statusbar
+    // locale-sensitive printf is OK, since this goes to the UI, not into SVG
+    gchar *alpha = g_strdup_printf(_(" alpha %.3g"), this->alpha);
+    // where the color is picked, to show in the statusbar
+    gchar *where = this->dragging ? g_strdup_printf(_(", averaged with radius %d"), (int) this->radius) : g_strdup_printf("%s", _(" under cursor"));
+    // message, to show in the statusbar
+    const gchar *message = this->dragging ? _("<b>Release mouse</b> to set color.") : _("<b>Click</b> to set fill, <b>Shift+click</b> to set stroke; <b>drag</b> to average color in area; with <b>Alt</b> to pick inverse color; <b>Ctrl+C</b> to copy the color under mouse to clipboard");
+
+    this->defaultMessageContext()->setF(
+        Inkscape::NORMAL_MESSAGE,
+        "<b>%s%s</b>%s. %s", c,
+        (pick == SP_DROPPER_PICK_VISIBLE) ? "" : alpha, where, message);
+
+    g_free(where);
+    g_free(alpha);
+
+    // Set the right cursor for the mode and apply the special Fill color
+    _cursor_filename = (this->dropping ? (this->stroke ? "dropper-drop-stroke.svg" : "dropper-drop-fill.svg") :
+                                        (this->stroke ? "dropper-pick-stroke.svg" : "dropper-pick-fill.svg") );
+
+    // We do this ourselves to get color correct.
+    auto display = _desktop->getCanvas()->get_display();
+    auto window = _desktop->getCanvas()->get_window();
+    auto cursor = load_svg_cursor(display, window, _cursor_filename, get_color(invert));
+    window->set_cursor(cursor);
+
+    if (!ret) {
+    	ret = ToolBase::root_handler(event);
+    }
+
+    return ret;
+}
+
+}
+}
+}
+
+
+/*
+  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 :