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Diffstat (limited to 'accessible/atk/nsMaiInterfaceText.cpp')
| -rw-r--r-- | accessible/atk/nsMaiInterfaceText.cpp | 629 |
1 files changed, 629 insertions, 0 deletions
diff --git a/accessible/atk/nsMaiInterfaceText.cpp b/accessible/atk/nsMaiInterfaceText.cpp new file mode 100644 index 000000000..1982f3730 --- /dev/null +++ b/accessible/atk/nsMaiInterfaceText.cpp @@ -0,0 +1,629 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "InterfaceInitFuncs.h" +#include "mozilla/a11y/PDocAccessible.h" +#include "Accessible-inl.h" +#include "HyperTextAccessible-inl.h" +#include "nsMai.h" +#include "ProxyAccessible.h" + +#include "nsIAccessibleTypes.h" +#include "nsIPersistentProperties2.h" +#include "nsISimpleEnumerator.h" + +#include "mozilla/Likely.h" + +using namespace mozilla; +using namespace mozilla::a11y; + +static const char* sAtkTextAttrNames[ATK_TEXT_ATTR_LAST_DEFINED]; + +void +ConvertTextAttributeToAtkAttribute(const nsACString& aName, + const nsAString& aValue, + AtkAttributeSet** aAttributeSet) +{ + // Handle attributes where atk has its own name. + const char* atkName = nullptr; + nsAutoString atkValue; + if (aName.EqualsLiteral("color")) { + // The format of the atk attribute is r,g,b and the gecko one is + // rgb(r, g, b). + atkValue = Substring(aValue, 4, aValue.Length() - 5); + atkValue.StripWhitespace(); + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FG_COLOR]; + } else if (aName.EqualsLiteral("background-color")) { + // The format of the atk attribute is r,g,b and the gecko one is + // rgb(r, g, b). + atkValue = Substring(aValue, 4, aValue.Length() - 5); + atkValue.StripWhitespace(); + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_BG_COLOR]; + } else if (aName.EqualsLiteral("font-family")) { + atkValue = aValue; + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FAMILY_NAME]; + } else if (aName.EqualsLiteral("font-size")) { + // ATK wants the number of pixels without px at the end. + atkValue = StringHead(aValue, aValue.Length() - 2); + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_SIZE]; + } else if (aName.EqualsLiteral("font-weight")) { + atkValue = aValue; + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_WEIGHT]; + } else if (aName.EqualsLiteral("invalid")) { + atkValue = aValue; + atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_INVALID]; + } + + if (atkName) { + AtkAttribute* objAttr = + static_cast<AtkAttribute*>(g_malloc(sizeof(AtkAttribute))); + objAttr->name = g_strdup(atkName); + objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(atkValue).get()); + *aAttributeSet = g_slist_prepend(*aAttributeSet, objAttr); + } +} + +static AtkAttributeSet* +ConvertToAtkTextAttributeSet(nsTArray<Attribute>& aAttributes) +{ + AtkAttributeSet* objAttributeSet = nullptr; + for (size_t i = 0; i < aAttributes.Length(); ++i) { + AtkAttribute* objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute)); + objAttr->name = g_strdup(aAttributes[i].Name().get()); + objAttr->value = + g_strdup(NS_ConvertUTF16toUTF8(aAttributes[i].Value()).get()); + objAttributeSet = g_slist_prepend(objAttributeSet, objAttr); + ConvertTextAttributeToAtkAttribute(aAttributes[i].Name(), + aAttributes[i].Value(), + &objAttributeSet); + } + return objAttributeSet; +} + +static AtkAttributeSet* +ConvertToAtkTextAttributeSet(nsIPersistentProperties* aAttributes) +{ + if (!aAttributes) + return nullptr; + + AtkAttributeSet* objAttributeSet = nullptr; + nsCOMPtr<nsISimpleEnumerator> propEnum; + nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum)); + NS_ENSURE_SUCCESS(rv, nullptr); + + bool hasMore = false; + while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) { + nsCOMPtr<nsISupports> sup; + rv = propEnum->GetNext(getter_AddRefs(sup)); + NS_ENSURE_SUCCESS(rv, objAttributeSet); + + nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup)); + NS_ENSURE_TRUE(propElem, objAttributeSet); + + nsAutoCString name; + rv = propElem->GetKey(name); + NS_ENSURE_SUCCESS(rv, objAttributeSet); + + nsAutoString value; + rv = propElem->GetValue(value); + NS_ENSURE_SUCCESS(rv, objAttributeSet); + + AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute)); + objAttr->name = g_strdup(name.get()); + objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get()); + objAttributeSet = g_slist_prepend(objAttributeSet, objAttr); + + ConvertTextAttributeToAtkAttribute(name, value, &objAttributeSet); + } + + // libatk-adaptor will free it + return objAttributeSet; +} + +static void +ConvertTexttoAsterisks(AccessibleWrap* accWrap, nsAString& aString) +{ + // convert each char to "*" when it's "password text" + if (accWrap->NativeRole() == roles::PASSWORD_TEXT) { + for (uint32_t i = 0; i < aString.Length(); i++) + aString.Replace(i, 1, NS_LITERAL_STRING("*")); + } +} + +extern "C" { + +static gchar* +getTextCB(AtkText *aText, gint aStartOffset, gint aEndOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + nsAutoString autoStr; + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) + return nullptr; + + text->TextSubstring(aStartOffset, aEndOffset, autoStr); + + ConvertTexttoAsterisks(accWrap, autoStr); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + proxy->TextSubstring(aStartOffset, aEndOffset, autoStr); + } + + NS_ConvertUTF16toUTF8 cautoStr(autoStr); + + //copy and return, libspi will free it. + return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr; +} + +static gchar* +getTextAfterOffsetCB(AtkText *aText, gint aOffset, + AtkTextBoundary aBoundaryType, + gint *aStartOffset, gint *aEndOffset) +{ + nsAutoString autoStr; + int32_t startOffset = 0, endOffset = 0; + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) + return nullptr; + + text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr); + ConvertTexttoAsterisks(accWrap, autoStr); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + proxy->GetTextAfterOffset(aOffset, aBoundaryType, autoStr, &startOffset, + &endOffset); + } + + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + NS_ConvertUTF16toUTF8 cautoStr(autoStr); + return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr; +} + +static gchar* +getTextAtOffsetCB(AtkText *aText, gint aOffset, + AtkTextBoundary aBoundaryType, + gint *aStartOffset, gint *aEndOffset) +{ + nsAutoString autoStr; + int32_t startOffset = 0, endOffset = 0; + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) + return nullptr; + + text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr); + ConvertTexttoAsterisks(accWrap, autoStr); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + proxy->GetTextAtOffset(aOffset, aBoundaryType, autoStr, &startOffset, + &endOffset); + } + + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + NS_ConvertUTF16toUTF8 cautoStr(autoStr); + return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr; +} + +static gunichar +getCharacterAtOffsetCB(AtkText* aText, gint aOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return 0; + } + + // char16_t is unsigned short in Mozilla, gnuichar is guint32 in glib. + return static_cast<gunichar>(text->CharAt(aOffset)); + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return static_cast<gunichar>(proxy->CharAt(aOffset)); + } + + return 0; +} + +static gchar* +getTextBeforeOffsetCB(AtkText *aText, gint aOffset, + AtkTextBoundary aBoundaryType, + gint *aStartOffset, gint *aEndOffset) +{ + nsAutoString autoStr; + int32_t startOffset = 0, endOffset = 0; + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) + return nullptr; + + text->TextBeforeOffset(aOffset, aBoundaryType, + &startOffset, &endOffset, autoStr); + ConvertTexttoAsterisks(accWrap, autoStr); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + proxy->GetTextBeforeOffset(aOffset, aBoundaryType, autoStr, &startOffset, + &endOffset); + } + + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + NS_ConvertUTF16toUTF8 cautoStr(autoStr); + return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr; +} + +static gint +getCaretOffsetCB(AtkText *aText) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return 0; + } + + return static_cast<gint>(text->CaretOffset()); + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return static_cast<gint>(proxy->CaretOffset()); + } + + return 0; +} + +static AtkAttributeSet* +getRunAttributesCB(AtkText *aText, gint aOffset, + gint *aStartOffset, + gint *aEndOffset) +{ + *aStartOffset = -1; + *aEndOffset = -1; + int32_t startOffset = 0, endOffset = 0; + + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return nullptr; + } + + nsCOMPtr<nsIPersistentProperties> attributes = + text->TextAttributes(false, aOffset, &startOffset, &endOffset); + + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + return ConvertToAtkTextAttributeSet(attributes); + } + + ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText)); + if (!proxy) { + return nullptr; + } + + AutoTArray<Attribute, 10> attrs; + proxy->TextAttributes(false, aOffset, &attrs, &startOffset, &endOffset); + *aStartOffset = startOffset; + *aEndOffset = endOffset; + return ConvertToAtkTextAttributeSet(attrs); +} + +static AtkAttributeSet* +getDefaultAttributesCB(AtkText *aText) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return nullptr; + } + + nsCOMPtr<nsIPersistentProperties> attributes = text->DefaultTextAttributes(); + return ConvertToAtkTextAttributeSet(attributes); + } + + ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText)); + if (!proxy) { + return nullptr; + } + + AutoTArray<Attribute, 10> attrs; + proxy->DefaultTextAttributes(&attrs); + return ConvertToAtkTextAttributeSet(attrs); +} + +static void +getCharacterExtentsCB(AtkText *aText, gint aOffset, + gint *aX, gint *aY, + gint *aWidth, gint *aHeight, + AtkCoordType aCoords) +{ + if(!aX || !aY || !aWidth || !aHeight) { + return; + } + + nsIntRect rect; + uint32_t geckoCoordType; + if (aCoords == ATK_XY_SCREEN) { + geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE; + } else { + geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE; + } + + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return; + } + + rect = text->CharBounds(aOffset, geckoCoordType); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + rect = proxy->CharBounds(aOffset, geckoCoordType); + } else { + return; + } + + *aX = rect.x; + *aY = rect.y; + *aWidth = rect.width; + *aHeight = rect.height; +} + +static void +getRangeExtentsCB(AtkText *aText, gint aStartOffset, gint aEndOffset, + AtkCoordType aCoords, AtkTextRectangle *aRect) +{ + if (!aRect) { + return; + } + + nsIntRect rect; + uint32_t geckoCoordType; + if (aCoords == ATK_XY_SCREEN) { + geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE; + } else { + geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE; + } + + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if(accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return; + } + + rect = text->TextBounds(aStartOffset, aEndOffset, geckoCoordType); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + rect = proxy->TextBounds(aStartOffset, aEndOffset, geckoCoordType); + } else { + return; + } + + aRect->x = rect.x; + aRect->y = rect.y; + aRect->width = rect.width; + aRect->height = rect.height; +} + +static gint +getCharacterCountCB(AtkText *aText) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* textAcc = accWrap->AsHyperText(); + return + textAcc->IsDefunct() ? 0 : static_cast<gint>(textAcc->CharacterCount()); + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return proxy->CharacterCount(); + } + + return 0; +} + +static gint +getOffsetAtPointCB(AtkText *aText, + gint aX, gint aY, + AtkCoordType aCoords) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return -1; + } + + return static_cast<gint>( + text->OffsetAtPoint(aX, aY, + (aCoords == ATK_XY_SCREEN ? + nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE : + nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE))); + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return static_cast<gint>( + proxy->OffsetAtPoint(aX, aY, + (aCoords == ATK_XY_SCREEN ? + nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE : + nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE))); + } + + return -1; +} + +static gint +getTextSelectionCountCB(AtkText *aText) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return 0; + } + + return text->SelectionCount(); + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return proxy->SelectionCount(); + } + + return 0; +} + +static gchar* +getTextSelectionCB(AtkText *aText, gint aSelectionNum, + gint *aStartOffset, gint *aEndOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + int32_t startOffset = 0, endOffset = 0; + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return nullptr; + } + + text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset); + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + return getTextCB(aText, *aStartOffset, *aEndOffset); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + nsString data; + proxy->SelectionBoundsAt(aSelectionNum, data, &startOffset, &endOffset); + *aStartOffset = startOffset; + *aEndOffset = endOffset; + + NS_ConvertUTF16toUTF8 dataAsUTF8(data); + return (dataAsUTF8.get()) ? g_strdup(dataAsUTF8.get()) : nullptr; + } + return nullptr; +} + +// set methods +static gboolean +addTextSelectionCB(AtkText *aText, + gint aStartOffset, + gint aEndOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return FALSE; + } + + return text->AddToSelection(aStartOffset, aEndOffset); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return proxy->AddToSelection(aStartOffset, aEndOffset); + } + + return FALSE; +} + +static gboolean +removeTextSelectionCB(AtkText *aText, + gint aSelectionNum) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return FALSE; + } + + return text->RemoveFromSelection(aSelectionNum); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return proxy->RemoveFromSelection(aSelectionNum); + } + + return FALSE; +} + +static gboolean +setTextSelectionCB(AtkText *aText, gint aSelectionNum, + gint aStartOffset, gint aEndOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole()) { + return FALSE; + } + + return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset); + } else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + return proxy->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset); + } + + return FALSE; +} + +static gboolean +setCaretOffsetCB(AtkText *aText, gint aOffset) +{ + AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText)); + if (accWrap) { + HyperTextAccessible* text = accWrap->AsHyperText(); + if (!text || !text->IsTextRole() || !text->IsValidOffset(aOffset)) { + return FALSE; + } + + text->SetCaretOffset(aOffset); + return TRUE; + } + + if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) { + proxy->SetCaretOffset(aOffset); + return TRUE; + } + + return FALSE; +} +} + +void +textInterfaceInitCB(AtkTextIface* aIface) +{ + NS_ASSERTION(aIface, "Invalid aIface"); + if (MOZ_UNLIKELY(!aIface)) + return; + + aIface->get_text = getTextCB; + aIface->get_text_after_offset = getTextAfterOffsetCB; + aIface->get_text_at_offset = getTextAtOffsetCB; + aIface->get_character_at_offset = getCharacterAtOffsetCB; + aIface->get_text_before_offset = getTextBeforeOffsetCB; + aIface->get_caret_offset = getCaretOffsetCB; + aIface->get_run_attributes = getRunAttributesCB; + aIface->get_default_attributes = getDefaultAttributesCB; + aIface->get_character_extents = getCharacterExtentsCB; + aIface->get_range_extents = getRangeExtentsCB; + aIface->get_character_count = getCharacterCountCB; + aIface->get_offset_at_point = getOffsetAtPointCB; + aIface->get_n_selections = getTextSelectionCountCB; + aIface->get_selection = getTextSelectionCB; + + // set methods + aIface->add_selection = addTextSelectionCB; + aIface->remove_selection = removeTextSelectionCB; + aIface->set_selection = setTextSelectionCB; + aIface->set_caret_offset = setCaretOffsetCB; + + // Cache the string values of the atk text attribute names. + for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++) + sAtkTextAttrNames[i] = + atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i)); +} |