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twtw-editing.c
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twtw-editing.c
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/*
* twtw-editing.c
* TwentyTwenty
*
* Created by Pauli Ojala on 29.11.2008.
* Copyright 2008 Pauli Olavi Ojala. All rights reserved.
*
*/
/*
This file is part of TwentyTwenty.
TwentyTwenty is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TwentyTwenty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TwentyTwenty. If not, see <http://www.gnu.org/licenses/>.
*/
#include "twtw-editing.h"
#include "twtw-units.h"
#include "twtw-document.h"
#include "twtw-filesystem.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
extern void twtw_notify_about_doc_change (const gint notifID);
// state during editing
typedef struct _TwtwCurveEditData {
gint smoothedCount;
} TwtwCurveEditData;
TwtwCurveList *twtw_editing_curvelist_create_with_start_cursor_point (TwtwPoint point)
{
TwtwCurveList *curvelist = twtw_curvelist_create ();
twtw_curvelist_set_implicit_start_point (curvelist, point);
TwtwCurveEditData *editData = g_malloc0(sizeof(TwtwCurveEditData));
twtw_curvelist_attach_edit_data (curvelist, editData);
return curvelist;
}
#if defined(MAEMO)
// these look nice for Maemo's hires screen and pen action
#define MAX_SMOOTHCOUNT 32
#define MAX_SMOOTHPOINTDIST TWTW_UNITS_FROM_INT(8)
#else
// these values seem to work better for mouse interaction
#define MAX_SMOOTHCOUNT 20
#define MAX_SMOOTHPOINTDIST TWTW_UNITS_FROM_INT(3)
#endif
#define START_STROKE_WEIGHT (4 * FIXD_TENTH) //TWTW_UNITS_FROM_FLOAT(0.4)
void twtw_editing_curvelist_add_cursor_point (TwtwCurveList *curvelist, TwtwPoint p)
{
g_return_if_fail (curvelist);
TwtwCurveEditData *editData = twtw_curvelist_get_edit_data (curvelist);
g_return_if_fail (editData);
gint segCount = twtw_curvelist_get_segment_count (curvelist);
// previous point
TwtwCurveSegment *prevSeg = (segCount > 0) ? twtw_curvelist_get_last_segment_ptr(curvelist) : NULL;
TwtwPoint pp = (prevSeg) ? prevSeg->endPoint
: twtw_curvelist_get_implicit_start_point(curvelist);
TwtwUnit dist = twtw_point_distance (pp, p);
TwtwUnit startWeight = (prevSeg) ? prevSeg->endWeight : START_STROKE_WEIGHT;
TwtwUnit endWeight;
{
float d = TWTW_UNITS_TO_FLOAT(dist);
float w;
/*
if (d > 2.0) {
w = 1.0 + log10f((d-2.0)) * 0.5;
} else {
w = 0.5 + 0.5 * (d / 2.0);
}*/
const float lim = 5.0; // was 2
if (d > lim) {
w = 1.0 + log2f(d-lim) * 0.3;
} else {
w = 0.5 + 0.5 * (d / lim);
}
endWeight = TWTW_UNITS_FROM_FLOAT(w);
//printf("..weight is %.4f (%.4f)\n", w, d);
}
gboolean addSeg = TRUE;
if (editData->smoothedCount < MAX_SMOOTHCOUNT && dist < MAX_SMOOTHPOINTDIST && segCount > 0) {
// for short segments, modify the previous segment for smoothing
//TwtwCurveSegment prevSeg = twtw_curvelist_get_last_segment (curvelist);
TwtwPoint v1 = TwtwMakePoint(prevSeg->endPoint.x - prevSeg->startPoint.x, prevSeg->endPoint.y - prevSeg->startPoint.y);
TwtwPoint v2 = TwtwMakePoint(p.x - pp.x, p.y - pp.y);
v1 = twtw_point_vec_normalize (v1);
v2 = twtw_point_vec_normalize (v2);
//TwtwUnit len1 = twtw_point_distance(TwtwMakePoint(0, 0), v1);
//TwtwUnit len2 = twtw_point_distance(TwtwMakePoint(0, 0), v2);
TwtwUnit dotprod = FIXD_QMUL(v1.x, v2.x) + FIXD_QMUL(v1.y, v2.y);
// no fixed-point acos implementation handy
float dotprod_f = fabsf(TWTW_UNITS_TO_FLOAT(dotprod));
float angle = acosf(MIN(1.0, MAX(0.0, dotprod_f))); // clamp to account for fixed-point inaccuracy
if (angle < 1.4f) {
TwtwCurveSegment modSeg = *prevSeg;
TwtwUnit prevLen = twtw_point_distance(modSeg.endPoint, modSeg.startPoint);
TwtwUnit thisLen = FIXD_MUL(dist, TWTW_UNITS_FROM_INT(2));
TwtwUnit totalLen = prevLen + thisLen;
TwtwUnit weight1 = FIXD_DIV(prevLen, totalLen);
TwtwUnit weight2 = FIXD_DIV(thisLen, totalLen);
TwtwPoint newVec = TwtwMakePoint( FIXD_QMUL(weight1, v1.x) + FIXD_QMUL(weight2, v2.x),
FIXD_QMUL(weight1, v1.y) + FIXD_QMUL(weight2, v2.y) );
TwtwPoint newEndPoint = TwtwMakePoint( pp.x + newVec.x, pp.y + newVec.y );
modSeg.endPoint = newEndPoint;
TwtwUnit newLen = twtw_point_distance(modSeg.endPoint, modSeg.startPoint);
twtw_curvelist_replace_segment (curvelist, segCount-1, &modSeg);
addSeg = FALSE;
editData->smoothedCount++;
if (segCount > 2) {
modSeg = twtw_curvelist_get_segment (curvelist, segCount-2);
prevLen = twtw_point_distance(modSeg.endPoint, modSeg.startPoint);
if (prevLen < FIXD_MUL(newLen, FIXD_HALF) && prevLen < TWTW_UNITS_FROM_FLOAT(5.8)) {
twtw_curvelist_delete_segment (curvelist, segCount-2);
segCount = twtw_curvelist_get_segment_count (curvelist);
if (segCount > 2) {
modSeg = twtw_curvelist_get_segment (curvelist, segCount-2);
prevLen = twtw_point_distance(modSeg.endPoint, modSeg.startPoint);
if (prevLen < FIXD_MUL(newLen, 4*FIXD_TENTH)) {
twtw_curvelist_delete_segment (curvelist, segCount-2);
segCount = twtw_curvelist_get_segment_count (curvelist);
if (segCount > 2) {
modSeg = twtw_curvelist_get_segment (curvelist, segCount-2);
prevLen = twtw_point_distance(modSeg.endPoint, modSeg.startPoint);
if (prevLen < FIXD_MUL(newLen, 3*FIXD_TENTH)) {
twtw_curvelist_delete_segment (curvelist, segCount-2);
segCount = twtw_curvelist_get_segment_count (curvelist);
}
}
}
}
twtw_curvelist_ensure_continuous_in_range (curvelist, 0, segCount);
}
}
}
}
if (addSeg) {
TwtwCurveSegment twseg;
twseg.segmentType = TWTW_SEG_CATMULLROM;
twseg.startPoint = pp;
twseg.endPoint = p;
twseg.controlPoint1 = TwtwMakePoint(TWTW_UNIT_NAN, TWTW_UNIT_NAN);
twseg.controlPoint2 = TwtwMakePoint(TWTW_UNIT_NAN, TWTW_UNIT_NAN);
twseg.startWeight = startWeight;
twseg.endWeight = endWeight;
twtw_curvelist_append_segment (curvelist, &twseg);
editData->smoothedCount = 0;
}
}
void twtw_editing_curvelist_finish_at_cursor_point (TwtwCurveList *curvelist, TwtwPoint point)
{
g_return_if_fail (curvelist);
twtw_curvelist_set_implicit_end_point (curvelist, point);
TwtwCurveEditData *editData = twtw_curvelist_get_edit_data (curvelist);
g_free(editData);
twtw_curvelist_attach_edit_data (curvelist, NULL);
}
// ---- undo ----
static TwtwAction *g_undoStack = NULL;
static size_t g_undoStackCount = 0;
static size_t g_undoStackCapacity = 0;
static const size_t
#if defined(__MACOSX__) || defined(__WIN32__)
g_undoStackMax = 25;
#elif defined(__APPLE__) || defined(__MAEMO__)
g_undoStackMax = 7;
#else
g_undoStackMax = 4;
#endif
static inline void destroyActionData(TwtwAction *action)
{
if (action->data) {
if (action->destructorFunc)
action->destructorFunc(action->data);
else
g_free(action->data);
}
if (action->targetSpecifier)
g_free(action->targetSpecifier);
}
void twtw_undo_push_action (TwtwAction *action)
{
g_return_if_fail(action);
g_return_if_fail(action->type > 0);
if (g_undoStackCount >= g_undoStackMax) {
TwtwAction oldestAction = g_undoStack[0];
memmove(g_undoStack, g_undoStack + 1, (g_undoStackCount - 1) * sizeof(TwtwAction));
destroyActionData(&oldestAction);
}
else {
g_undoStackCount++;
if (g_undoStackCount > g_undoStackCapacity) {
g_undoStackCapacity = g_undoStackCount + 7;
g_undoStack = (g_undoStack) ? g_realloc(g_undoStack, g_undoStackCapacity * sizeof(TwtwAction))
: g_malloc(g_undoStackCapacity * sizeof(TwtwAction));
}
}
g_undoStack[g_undoStackCount - 1] = *action;
}
// private function for notifying page about new audio recording
extern void twtw_page_ui_did_record_pcm_with_file_size (TwtwPage *page, gint fileSize);
static const TwtwAction nullTwtwAction = { 0, 0, NULL, NULL, NULL };
gboolean twtw_undo_pop_and_perform ()
{
if (g_undoStackCount < 1)
return TWTW_NO_ACTION;
TwtwAction action = g_undoStack[g_undoStackCount - 1];
g_undoStack[g_undoStackCount - 1] = nullTwtwAction;
g_undoStackCount--;
// perform the action
TwtwBook *doc = twtw_active_document ();
TwtwPage *page = (action.targetPageIndex > -1) ? twtw_book_get_page (doc, action.targetPageIndex) : NULL;
gint notifType = 0;
switch (action.type) {
case TWTW_ACTION_DELETE_LAST_CURVE: {
gint curveCount = twtw_page_get_curves_count (page);
if (curveCount > 0) {
twtw_page_delete_curve_at_index (page, curveCount - 1);
twtw_page_invalidate_thumb (page);
notifType = TWTW_NOTIF_DOCUMENT_PAGE_MODIFIED;
}
break;
}
case TWTW_ACTION_SET_CURVES: {
TwtwCurveListArray *arr = (TwtwCurveListArray *)action.data;
if ( !arr) {
printf("**** undo action 'set curves' requires a curvelistarray object\n");
} else {
twtw_page_replace_curves_copy (page, arr->count, arr->array);
twtw_page_invalidate_thumb (page);
notifType = TWTW_NOTIF_DOCUMENT_PAGE_MODIFIED;
}
break;
}
case TWTW_ACTION_SET_PCM_SOUND: {
char *pcmPath = (char *)action.data;
if ( !pcmPath) {
printf("**** undo action 'set pcm sound' requires an associated path object\n");
} else {
const char *pagePath = twtw_page_get_temp_path_for_pcm_sound_utf8 (page);
if (twtw_filesys_copy_file (pcmPath, strlen(pcmPath), pagePath, strlen(pagePath), TRUE)) {
// notify the page that its sound file has been replaced
twtw_page_ui_did_record_pcm_with_file_size (page, twtw_filesys_get_file_size_utf8 (pagePath, strlen(pagePath), NULL));
notifType = TWTW_NOTIF_DOCUMENT_PAGE_MODIFIED;
}
}
break;
}
case TWTW_ACTION_SET_BG_PHOTO: {
twtw_page_set_yuv_photo_copy (page, (TwtwYUVImage *)action.data);
twtw_page_invalidate_thumb (page);
notifType = TWTW_NOTIF_DOCUMENT_PAGE_MODIFIED;
break;
}
case TWTW_ACTION_SET_TITLE:
case TWTW_ACTION_SET_AUTHOR: {
char *str = (action.data) ? (char *)action.data : "";
if (action.type == TWTW_ACTION_SET_TITLE)
twtw_book_set_title (doc, str);
else
twtw_book_set_author (doc, str);
notifType = TWTW_NOTIF_DOCUMENT_MODIFIED;
break;
}
case TWTW_ACTION_SET_DOCFLAGS: {
if (action.data) {
gint32 *flags = (gint32 *)action.data;
twtw_book_set_flags (doc, *flags);
notifType = TWTW_NOTIF_DOCUMENT_MODIFIED;
}
break;
}
}
destroyActionData(&action);
if (notifType > 0)
twtw_notify_about_doc_change (notifType);
return action.type;
}
gint twtw_undo_get_topmost_action_type ()
{
if (g_undoStackCount < 1)
return TWTW_NO_ACTION;
else
return g_undoStack[g_undoStackCount - 1].type;
}
gint twtw_undo_get_stack_count ()
{
return g_undoStackCount;
}
void twtw_undo_clear_stack ()
{
memset(g_undoStack, 0, g_undoStackCapacity * sizeof(TwtwAction));
g_undoStackCount = 0;
}