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5526e819 | 1 | ///////////////////////////////////////////////////////////////////////////// |
c88293a4 | 2 | // Name: m_layout.cpp |
5526e819 VS |
3 | // Purpose: wxHtml module for basic paragraphs/layout handling |
4 | // Author: Vaclav Slavik | |
69941f05 | 5 | // RCS-ID: $Id$ |
5526e819 | 6 | // Copyright: (c) 1999 Vaclav Slavik |
65571936 | 7 | // Licence: wxWindows licence |
5526e819 | 8 | ///////////////////////////////////////////////////////////////////////////// |
14f355c2 | 9 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
3364ab79 RS |
10 | #pragma implementation |
11 | #endif | |
12 | ||
314260fb | 13 | #include "wx/wxprec.h" |
5526e819 | 14 | |
314260fb | 15 | #include "wx/defs.h" |
97e490f8 | 16 | |
f6bcfd97 | 17 | #if wxUSE_HTML && wxUSE_STREAMS |
97e490f8 | 18 | |
2b5f62a0 | 19 | #ifdef __BORLANDC__ |
97e490f8 | 20 | #pragma hdrstop |
3364ab79 RS |
21 | #endif |
22 | ||
23 | #ifndef WXPRECOMP | |
3364ab79 RS |
24 | #endif |
25 | ||
97e490f8 | 26 | #include "wx/image.h" |
5526e819 | 27 | |
69941f05 VS |
28 | #include "wx/html/forcelnk.h" |
29 | #include "wx/html/m_templ.h" | |
5526e819 | 30 | |
69941f05 | 31 | #include "wx/html/htmlwin.h" |
5526e819 | 32 | |
c88293a4 | 33 | FORCE_LINK_ME(m_layout) |
5526e819 | 34 | |
7127d129 RR |
35 | #ifdef __WXWINCE__ |
36 | #include "wx/msw/wince/missing.h" // for bsearch() | |
37 | #else | |
38 | #include <stdlib.h> // bsearch() | |
39 | #endif | |
f2034f1b VS |
40 | |
41 | //----------------------------------------------------------------------------- | |
42 | // wxHtmlPageBreakCell | |
43 | //----------------------------------------------------------------------------- | |
44 | ||
45 | // Since html isn't a page-layout language, it doesn't support page | |
46 | // page breaks directly--that requires CSS2 support. But a page-break | |
47 | // facility is handy, and has been requested more than once on the | |
48 | // mailing lists. This wxHtml tag handler implements just enough of | |
49 | // CSS2 to support a page break by recognizing only | |
50 | // <div style="page-break-before:always"> | |
51 | // | |
52 | // wxHtml maintains page breaks in wxHtmlPrintout::m_PageBreaks. The | |
53 | // tag handler below adds appropriate offsets to that array member. | |
54 | // wxHtmlDCRenderer::Render() accesses that array and makes a new page | |
55 | // begin after each page-break tag. | |
56 | ||
57 | // The page-break handler does all its work in AdjustPagebreak(). For | |
58 | // all tag handlers, that function adjusts the page-break position. | |
59 | // For other tags, it determines whether the html element can fit on | |
60 | // the remainder of the page; if it cannot fit, but must not be split, | |
61 | // then the function moves the page break provided in the argument up, | |
62 | // and returns 'true' to inform the caller that the argument was | |
63 | // modified. | |
64 | // | |
65 | // Due to its special purpose, the page-break facility differs from | |
66 | // other tags. It takes up no space, but it behaves as though there is | |
67 | // never enough room to fit it on the remainder of the page--it always | |
68 | // forces a page break. Therefore, unlike other elements that trigger | |
69 | // a page break, it would never 'fit' on the following page either. | |
70 | // Therefore it's necessary to compare each pagebreak candidate to the | |
71 | // array wxHtmlPrintout::m_PageBreaks of pagebreaks already set, and | |
72 | // set a new one only if it's not in that array. | |
73 | ||
4460b6c4 | 74 | class wxHtmlPageBreakCell : public wxHtmlCell |
f2034f1b | 75 | { |
36c4ff4d | 76 | public: |
f2034f1b VS |
77 | wxHtmlPageBreakCell() {} |
78 | ||
36c4ff4d VS |
79 | bool AdjustPagebreak(int* pagebreak, |
80 | int* known_pagebreaks = NULL, | |
81 | int number_of_pages = 0) const; | |
82 | void Draw(wxDC& WXUNUSED(dc), | |
83 | int WXUNUSED(x), int WXUNUSED(y), | |
84 | int WXUNUSED(view_y1), int WXUNUSED(view_y2), | |
e3ac6ee1 | 85 | wxHtmlRenderingInfo& WXUNUSED(info)) {} |
f2034f1b | 86 | |
36c4ff4d | 87 | private: |
f2034f1b VS |
88 | DECLARE_NO_COPY_CLASS(wxHtmlPageBreakCell) |
89 | }; | |
90 | ||
91 | // Comparison routine for bsearch into an int* array of pagebreaks. | |
f9ba645e | 92 | extern "C" int wxCMPFUNC_CONV wxInteger_compare(void const* i0, void const* i1) |
f2034f1b VS |
93 | { |
94 | return *(int*)i0 - *(int*)i1; | |
95 | } | |
96 | ||
97 | bool wxHtmlPageBreakCell::AdjustPagebreak(int* pagebreak, int* known_pagebreaks, int number_of_pages) const | |
98 | { | |
99 | // When we are counting pages, 'known_pagebreaks' is non-NULL. | |
100 | // That's the only time we change 'pagebreak'. Otherwise, pages | |
101 | // were already counted, 'known_pagebreaks' is NULL, and we don't | |
d1da8872 | 102 | // do anything except return false. |
f2034f1b | 103 | // |
d1da8872 | 104 | // We also simply return false if the 'pagebreak' argument is |
f2034f1b VS |
105 | // less than (vertically above) or the same as the current |
106 | // vertical position. Otherwise we'd be setting a pagebreak above | |
107 | // the current cell, which is incorrect, or duplicating a | |
108 | // pagebreak that has already been set. | |
109 | if(NULL == known_pagebreaks || *pagebreak <= m_PosY) | |
110 | { | |
d1da8872 | 111 | return false; |
f2034f1b VS |
112 | } |
113 | ||
114 | // m_PosY is only the vertical offset from the parent. The pagebreak | |
115 | // required here is the total page offset, so m_PosY must be added | |
116 | // to the parent's offset and height. | |
117 | int total_height = m_PosY + GetParent()->GetPosY() + GetParent()->GetHeight(); | |
118 | ||
119 | // Search the array of pagebreaks to see whether we've already set | |
120 | // a pagebreak here. The standard bsearch() function is appropriate | |
121 | // because the array of pagebreaks through known_pagebreaks[number_of_pages] | |
122 | // is known to be sorted in strictly increasing order. '1 + number_of_pages' | |
123 | // is used as a bsearch() argument because the array contains a leading | |
124 | // zero plus one element for each page. | |
125 | int* where = (int*) bsearch(&total_height, known_pagebreaks, | |
126 | 1 + number_of_pages, sizeof(int), | |
f9ba645e | 127 | wxInteger_compare); |
f2034f1b VS |
128 | // Add a pagebreak only if there isn't one already set here. |
129 | if(NULL != where) | |
130 | { | |
d1da8872 | 131 | return false; |
f2034f1b VS |
132 | } |
133 | else | |
134 | { | |
135 | *pagebreak = m_PosY; | |
d1da8872 | 136 | return true; |
f2034f1b VS |
137 | } |
138 | } | |
139 | ||
5526e819 | 140 | TAG_HANDLER_BEGIN(P, "P") |
fc7a2a60 | 141 | TAG_HANDLER_CONSTR(P) { } |
5526e819 VS |
142 | |
143 | TAG_HANDLER_PROC(tag) | |
144 | { | |
e3774124 | 145 | if (m_WParser->GetContainer()->GetFirstChild() != NULL) |
04dbb646 | 146 | { |
4f9297b0 VS |
147 | m_WParser->CloseContainer(); |
148 | m_WParser->OpenContainer(); | |
8c651ab7 | 149 | } |
4f9297b0 VS |
150 | m_WParser->GetContainer()->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); |
151 | m_WParser->GetContainer()->SetAlign(tag); | |
d1da8872 | 152 | return false; |
5526e819 VS |
153 | } |
154 | ||
155 | TAG_HANDLER_END(P) | |
156 | ||
157 | ||
158 | ||
159 | TAG_HANDLER_BEGIN(BR, "BR") | |
fc7a2a60 | 160 | TAG_HANDLER_CONSTR(BR) { } |
5526e819 VS |
161 | |
162 | TAG_HANDLER_PROC(tag) | |
163 | { | |
4f9297b0 | 164 | int al = m_WParser->GetContainer()->GetAlignHor(); |
5526e819 | 165 | wxHtmlContainerCell *c; |
33ac7e6f | 166 | |
4f9297b0 VS |
167 | m_WParser->CloseContainer(); |
168 | c = m_WParser->OpenContainer(); | |
169 | c->SetAlignHor(al); | |
170 | c->SetAlign(tag); | |
171 | c->SetMinHeight(m_WParser->GetCharHeight()); | |
d1da8872 | 172 | return false; |
5526e819 VS |
173 | } |
174 | ||
175 | TAG_HANDLER_END(BR) | |
176 | ||
177 | ||
178 | ||
179 | TAG_HANDLER_BEGIN(CENTER, "CENTER") | |
fc7a2a60 | 180 | TAG_HANDLER_CONSTR(CENTER) { } |
5526e819 VS |
181 | |
182 | TAG_HANDLER_PROC(tag) | |
183 | { | |
4f9297b0 VS |
184 | int old = m_WParser->GetAlign(); |
185 | wxHtmlContainerCell *c = m_WParser->GetContainer(); | |
186 | ||
187 | m_WParser->SetAlign(wxHTML_ALIGN_CENTER); | |
e3774124 | 188 | if (c->GetFirstChild() != NULL) |
04dbb646 | 189 | { |
4f9297b0 VS |
190 | m_WParser->CloseContainer(); |
191 | m_WParser->OpenContainer(); | |
5526e819 VS |
192 | } |
193 | else | |
4f9297b0 | 194 | c->SetAlignHor(wxHTML_ALIGN_CENTER); |
5526e819 | 195 | |
33ac7e6f | 196 | if (tag.HasEnding()) |
04dbb646 | 197 | { |
5526e819 VS |
198 | ParseInner(tag); |
199 | ||
4f9297b0 | 200 | m_WParser->SetAlign(old); |
e3774124 | 201 | if (c->GetFirstChild() != NULL) |
04dbb646 | 202 | { |
4f9297b0 VS |
203 | m_WParser->CloseContainer(); |
204 | m_WParser->OpenContainer(); | |
5526e819 VS |
205 | } |
206 | else | |
4f9297b0 | 207 | c->SetAlignHor(old); |
5526e819 | 208 | |
d1da8872 | 209 | return true; |
5526e819 | 210 | } |
d1da8872 | 211 | else return false; |
5526e819 VS |
212 | } |
213 | ||
214 | TAG_HANDLER_END(CENTER) | |
215 | ||
216 | ||
217 | ||
218 | TAG_HANDLER_BEGIN(DIV, "DIV") | |
fc7a2a60 | 219 | TAG_HANDLER_CONSTR(DIV) { } |
5526e819 VS |
220 | |
221 | TAG_HANDLER_PROC(tag) | |
222 | { | |
92337e39 | 223 | if(tag.HasParam(wxT("STYLE"))) |
04dbb646 | 224 | { |
d1da8872 | 225 | if(tag.GetParam(wxT("STYLE")).IsSameAs(wxT("PAGE-BREAK-BEFORE:ALWAYS"), false)) |
f2034f1b VS |
226 | { |
227 | m_WParser->CloseContainer(); | |
228 | m_WParser->OpenContainer()->InsertCell(new wxHtmlPageBreakCell); | |
229 | m_WParser->CloseContainer(); | |
230 | m_WParser->OpenContainer(); | |
d1da8872 | 231 | return false; |
f2034f1b VS |
232 | } |
233 | else | |
234 | { | |
235 | // Treat other STYLE parameters here when they're supported. | |
d1da8872 | 236 | return false; |
f2034f1b | 237 | } |
5526e819 | 238 | } |
92337e39 | 239 | else if(tag.HasParam(wxT("ALIGN"))) |
04dbb646 | 240 | { |
f2034f1b VS |
241 | int old = m_WParser->GetAlign(); |
242 | wxHtmlContainerCell *c = m_WParser->GetContainer(); | |
e3774124 | 243 | if (c->GetFirstChild() != NULL) |
f2034f1b VS |
244 | { |
245 | m_WParser->CloseContainer(); | |
246 | m_WParser->OpenContainer(); | |
247 | c = m_WParser->GetContainer(); | |
248 | c->SetAlign(tag); | |
249 | m_WParser->SetAlign(c->GetAlignHor()); | |
250 | } | |
251 | else | |
252 | { | |
253 | c->SetAlign(tag); | |
254 | m_WParser->SetAlign(c->GetAlignHor()); | |
255 | } | |
5526e819 | 256 | |
f2034f1b | 257 | ParseInner(tag); |
5526e819 | 258 | |
f2034f1b | 259 | m_WParser->SetAlign(old); |
e3774124 | 260 | if (c->GetFirstChild() != NULL) |
f2034f1b VS |
261 | { |
262 | m_WParser->CloseContainer(); | |
263 | m_WParser->OpenContainer(); | |
264 | } | |
265 | else | |
266 | c->SetAlignHor(old); | |
267 | ||
c5448f38 | 268 | return true; |
5526e819 VS |
269 | } |
270 | else | |
f2034f1b | 271 | { |
c5448f38 VS |
272 | // Same as BR |
273 | int al = m_WParser->GetContainer()->GetAlignHor(); | |
274 | wxHtmlContainerCell *c; | |
275 | ||
276 | m_WParser->CloseContainer(); | |
277 | c = m_WParser->OpenContainer(); | |
278 | c->SetAlignHor(al); | |
279 | c->SetAlign(tag); | |
280 | c->SetMinHeight(m_WParser->GetCharHeight()); | |
281 | return false; | |
f2034f1b | 282 | } |
5526e819 VS |
283 | } |
284 | ||
285 | TAG_HANDLER_END(DIV) | |
286 | ||
287 | ||
288 | ||
289 | ||
290 | TAG_HANDLER_BEGIN(TITLE, "TITLE") | |
fc7a2a60 | 291 | TAG_HANDLER_CONSTR(TITLE) { } |
5526e819 VS |
292 | |
293 | TAG_HANDLER_PROC(tag) | |
294 | { | |
33ac7e6f | 295 | if (m_WParser->GetWindow()) |
04dbb646 | 296 | { |
4f9297b0 | 297 | wxHtmlWindow *wfr = (wxHtmlWindow*)(m_WParser->GetWindow()); |
33ac7e6f | 298 | if (wfr) |
04dbb646 | 299 | { |
4d5881b1 | 300 | wxString title = m_WParser->GetSource()->Mid( |
d1da8872 | 301 | tag.GetBeginPos(), |
4d5881b1 | 302 | tag.GetEndPos1()-tag.GetBeginPos()); |
140ba067 VS |
303 | #if !wxUSE_UNICODE |
304 | wxCSConv conv(m_WParser->GetInputEncoding()); | |
140ba067 | 305 | title = wxString(title.wc_str(conv), wxConvLocal); |
140ba067 | 306 | #endif |
4d5881b1 VS |
307 | title = m_WParser->GetEntitiesParser()->Parse(title); |
308 | wfr->OnSetTitle(title); | |
5526e819 VS |
309 | } |
310 | } | |
d1da8872 | 311 | return true; |
5526e819 VS |
312 | } |
313 | ||
314 | TAG_HANDLER_END(TITLE) | |
315 | ||
316 | ||
317 | ||
318 | ||
319 | TAG_HANDLER_BEGIN(BODY, "BODY") | |
fc7a2a60 | 320 | TAG_HANDLER_CONSTR(BODY) { } |
5526e819 VS |
321 | |
322 | TAG_HANDLER_PROC(tag) | |
323 | { | |
5526e819 VS |
324 | wxColour clr; |
325 | ||
8bd72d90 | 326 | if (tag.GetParamAsColour(wxT("TEXT"), &clr)) |
04dbb646 | 327 | { |
8bd72d90 VS |
328 | m_WParser->SetActualColor(clr); |
329 | m_WParser->GetContainer()->InsertCell(new wxHtmlColourCell(clr)); | |
5526e819 VS |
330 | } |
331 | ||
8bd72d90 VS |
332 | if (tag.GetParamAsColour(wxT("LINK"), &clr)) |
333 | m_WParser->SetLinkColor(clr); | |
334 | ||
97e490f8 VZ |
335 | if (tag.HasParam(wxT("BACKGROUND"))) |
336 | { | |
337 | wxFSFile *fileBgImage = m_WParser->OpenURL | |
338 | ( | |
339 | wxHTML_URL_IMAGE, | |
340 | tag.GetParam(wxT("BACKGROUND")) | |
341 | ); | |
342 | if ( fileBgImage ) | |
343 | { | |
344 | wxInputStream *is = fileBgImage->GetStream(); | |
345 | if ( is ) | |
346 | { | |
347 | wxImage image(*is); | |
348 | if ( image.Ok() ) | |
349 | m_WParser->GetWindow()->SetBackgroundImage(image); | |
350 | } | |
351 | } | |
352 | } | |
353 | ||
8bd72d90 | 354 | if (tag.GetParamAsColour(wxT("BGCOLOR"), &clr)) |
04dbb646 | 355 | { |
8bd72d90 VS |
356 | m_WParser->GetContainer()->InsertCell( |
357 | new wxHtmlColourCell(clr, wxHTML_CLR_BACKGROUND)); | |
358 | if (m_WParser->GetWindow() != NULL) | |
359 | m_WParser->GetWindow()->SetBackgroundColour(clr); | |
5526e819 | 360 | } |
97e490f8 | 361 | |
d1da8872 | 362 | return false; |
5526e819 VS |
363 | } |
364 | ||
365 | TAG_HANDLER_END(BODY) | |
366 | ||
367 | ||
368 | ||
369 | TAG_HANDLER_BEGIN(BLOCKQUOTE, "BLOCKQUOTE") | |
fc7a2a60 | 370 | TAG_HANDLER_CONSTR(BLOCKQUOTE) { } |
5526e819 VS |
371 | |
372 | TAG_HANDLER_PROC(tag) | |
373 | { | |
374 | wxHtmlContainerCell *c; | |
33ac7e6f | 375 | |
4f9297b0 VS |
376 | m_WParser->CloseContainer(); |
377 | c = m_WParser->OpenContainer(); | |
33ac7e6f | 378 | |
04dbb646 | 379 | if (c->GetAlignHor() == wxHTML_ALIGN_RIGHT) |
4f9297b0 | 380 | c->SetIndent(5 * m_WParser->GetCharWidth(), wxHTML_INDENT_RIGHT); |
5526e819 | 381 | else |
4f9297b0 | 382 | c->SetIndent(5 * m_WParser->GetCharWidth(), wxHTML_INDENT_LEFT); |
33ac7e6f | 383 | |
04dbb646 | 384 | c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_TOP); |
4f9297b0 | 385 | m_WParser->OpenContainer(); |
5526e819 | 386 | ParseInner(tag); |
4f9297b0 VS |
387 | c = m_WParser->CloseContainer(); |
388 | c->SetIndent(m_WParser->GetCharHeight(), wxHTML_INDENT_BOTTOM); | |
389 | m_WParser->CloseContainer(); | |
390 | m_WParser->OpenContainer(); | |
d1da8872 | 391 | return true; |
5526e819 VS |
392 | } |
393 | ||
394 | TAG_HANDLER_END(BLOCKQUOTE) | |
395 | ||
396 | ||
397 | ||
8829fa82 VS |
398 | // Tag handler for tags that we have to ignore, otherwise non-text data |
399 | // would show up as text: | |
400 | TAG_HANDLER_BEGIN(DoNothing, "SCRIPT") | |
fc7a2a60 VZ |
401 | TAG_HANDLER_CONSTR(DoNothing) { } |
402 | ||
403 | TAG_HANDLER_PROC(WXUNUSED(tag)) | |
8829fa82 VS |
404 | { |
405 | return true; | |
406 | } | |
407 | TAG_HANDLER_END(DoNothing) | |
5526e819 VS |
408 | |
409 | ||
410 | ||
411 | TAGS_MODULE_BEGIN(Layout) | |
412 | ||
413 | TAGS_MODULE_ADD(P) | |
414 | TAGS_MODULE_ADD(BR) | |
415 | TAGS_MODULE_ADD(CENTER) | |
416 | TAGS_MODULE_ADD(DIV) | |
417 | TAGS_MODULE_ADD(TITLE) | |
418 | TAGS_MODULE_ADD(BODY) | |
419 | TAGS_MODULE_ADD(BLOCKQUOTE) | |
8829fa82 | 420 | TAGS_MODULE_ADD(DoNothing) |
5526e819 VS |
421 | |
422 | TAGS_MODULE_END(Layout) | |
423 | ||
424 | #endif |